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This is the character sheet for the Animorphs series.


My name is...


Jake is one of those people who are natural leaders. If you were ever trapped in a burning building, you would turn to Jake and ask "What do we do?" And he would have an answer, too.

"Big Jake, Fearless Leader" of the Animorphs; not because he wanted to be, but because his friends look to him for guidance. While saving the world is nice, what he really wants most is to save his brother Tom, a Controller. Known as an open and friendly guy at the beginning of the series, the constant pressures of having to act as leader and manipulate his friends for strategic ends gradually cause him to become more ruthless.


I should have never suggested to Rachel that she's weak or helpless. Rachel may look like Little Miss Teen Model or whatever, but she thinks she's Storm from the X-Men.

The beautiful and bold cousin of Jake. She looks like a teen fashion model, but is no ditz. Don't make the mistake of calling her one, either. She would love an excuse to send you flying through a wall. Unlike the others, Rachel loves the thrill and adrenaline surge of combat, and she becomes more and more unstable as the series progresses. Not helping is the fact that her friends, particularly Jake, implicitly encourage this by using her for her "unique talents".


He was a sweet, poetic kind of guy. The kind bullies love to pick on. He used to have messy, out-of-control hair and dreamy eyes that always seemed to be looking at something no one else could see. Used to... Now he has fierce, angry eyes that look through you like laser beams.

The quiet and thoughtful loner. Neglected at home and bullied at school, the morphing ability provided him with an escape. Finding freedom as a red-tailed hawk, he soon broke the two hour limit and trapped himself in the bird body for keeps (he later regains his morphing ability, but with the hawk as his normal form). As you'd expect, flying aside, living as a hawk is not always fun, and the harsh realities of living as a part of nature (such as starving when hunting is bad and having to fight for territory) are piled on top of Tobias' increasing inability to function as a human and the fact that he's a major component of Earth's defense.

  • Airborne Aircraft Carrier: Interestingly, he serves as a living version of this on more than one occasion, carrying the rest of the team to and from missions when they're in bug morph.
  • Animorphism
  • Badass Bookworm: It's mentioned that he spends some of his time reading books over people's shoulders.
  • Big Badass Bird of Prey: Red-tailed hawk, the morph he is stuck in.
  • Big Creepy-Crawlies: Taxxons. Invoked because Tobias has dubious honor of morphing one in The Test
  • Body Double: In The Illusion Tobias acquires and morphs Ax to convince the Yeerks he's an Andalite.
  • Bully Hunter: Seen most notably in The Android, where he's more than happy to give a few bullies chasing Erek a talon haircut.
  • Butterfly of Doom: Tobias killed the dinosaurs. No, really.
  • Changeling Fantasy
  • The Chick: A lot of debate on this one.
  • Daddy Had a Good Reason For Abandoning You
  • Death From Above: To small mammals and Yeerks.
  • Drives Like Crazy: He's an even worse driver than Marco. This is to be expected, though.
  • Dog Walks You: Unintentionally evoked by Tobias in his last book, The Diversion. He has to morph Champ, his mother's seeing-eye dog, to rescue her.
  • Double Consciousness
  • Fan Nickname: Emohawk
  • First-Name Basis: Lampshaded in The Pretender. His last name might be Fangor, but that's never confirmed.
  • Flowers for Algernon Syndrome: Subverted in that he kept his new ability, but still chose to remain a hawk most of the time.
  • Friendless Background
  • Future Badass: In The Familiar, Tobias has trapped himself in Ax's morph permanently and is ten years older, giving him the appearance of the second coming of Elfangor. He is also the hidden mastermind behind the EF.
  • Genocide Dilemma: In the climax of Megamorphs #02.
  • Go for the Eye: Seeing as how he fights most battles in his hawk form, this is one of his favored tactics.
  • Hair-Raising Hare: Tobias morphs a rabbit in The Pretender to experience what it feels like to be prey.
  • Half-Human Hybrid: In more ways than one.
  • Herald: In two senses. He's the one who pushes Jake into accepting what they saw was real, and he's also the Ellimist's favored Animorph.
  • Heroic Safe Mode: He resorts to this in The Illusion to keep from going insane from being tortured.
  • Human Mom, Nonhuman Dad
  • I Did What I Had to Do: He hauls this one out in the second Megamorphs book after arranging the extinction of the dinosaurs.
  • I Just Want to Be Normal: Complicated by the fact that there is much evidence that Tobias prefers being a hawk. This doesn't stop the angst though. In The Change, after spending an extended time trapped as a hawk, he finds himself wishing to be human again. Yet when he gets his morphing ability back, he chooses to remain a hawk rather than to become human and lose the ability to morph.
  • Jumped At the Call: Even more so than Rachel. He was the first of the Animorphs to try morphing, and pretty much dragooned Jake into admitting it was real.
  • Karma Houdini: He never really faces any consequences or guilt as a result of his decision to genocide the Mercora, and the whole sordid affair is forgotten about for the rest of the series.
  • Luke, I Am Your Father: He is Elfangor's son.
  • The Messiah: The free Hork-Bajir see him as one.
  • My Future Self and Me: Exploited by the Ellimist to allow Tobias to acquire his human self as a morph.
  • Non-Human Sidekick: Sort of. He ended up playing this role in the games straight, though.
  • Non Sequitur Thud: In The Discovery Tobias accidentally knocks himself silly against David's window and starts rambling about Clue.
  • Number Two: Jake appoints him leader of the Marco/Tobias/Ax sub-team, which ended up carrying the end of the war.
  • Out-of-Character Moment: Infamously done in Megamorphs #02, to the point of most fans treating that book as Fanon Discontinuity.
  • Not Quite Back to Normal
  • Parental Abandonment
  • Predators Are Mean: Subverted - Tobias regularly kills and eats small animals to survive, but he's actually one of the kinder, gentler members of the team.
  • Red Pill, Blue Pill: In The Change, the Ellimist gives Tobias the chance to turn back into a human, but only if he gives up his morphing power and abandons the fight against the Yeerks.
  • Shapeshifter Default Form: The red-tailed hawk became his natural form after he regained the morphing ability.
  • Shapeshifter Mode Lock
  • The Smart Guy: Jake's "go-to" guy, as his "personal Air Force," who acts as the team scout before they go out on a mission will know what they can expect.
  • The Stoic: Not really, but in his human form he comes across as such. He's been a hawk so long he forgets to make facial expressions, you see.
  • Stockholm Syndrome: Courtesy of Taylor. See below for more on her.
  • Super Senses: As a hawk he has amazing sight and hearing.
  • The Chosen One: The Ellimist flat-out tells him as such in The Change. Strangely, it never really seems to go anywhere.
  • Unable to Cry: And it ends up saving his life. Definitely a case of Blessed with Suck.
  • Why Did It Have To Be Water?: He hates water missions. It's a bird thing.
  • Yank the Dog's Chain: In The Pretender, the woman who was going to be Tobias's new family turns out to be Visser Three in a morph.


If you want to picture Cassie, think of a short, cute girl with very short black hair, wearing overalls and big muddy boots and looking totally capable of giving a tetanus shot to an angry bear.

The kind and compassionate member of the group, a young animal lover who helps her parents at their Wildlife Rehabilitation Clinic. She often serves as the group's "moral compass". Initially a moral absolutist, the things she's forced to do cause her to re-evaluate her ethics.


Marco thinks the whole world is just a setup for a joke. Marco will tell a joke while he's bleeding and terrified and in pain. But there are times when his eyes lose their skeptical expression and grow glittery and dangerous.

Jake's best bud since infancy, the comedian of the group, as well as most cynical, ruthless and practical. He was against fighting the Yeerks at the beginning, but soon changed his resolve when it became personal. Described as a "paranoid nutcase" with a "Hamlet complex", Marco's knack for strategic and critical thinking was instrumental when it came to missions and the security for the group, but his tendency to hold efficiency and pragmatism above all else would cause him to have personal conflicts.

Jake: Do you hate trash cans? Is that it? Do you just HATE TRASH CANS?

Rachel: Kinda the perfect morph for Marco, when you thought about it.

Aximili-Esgarrouth-Isthill (Ax)

You are now the eldest child. Do you, Aximili, take on the burden of avenging your brother's death?

Elfangor's younger brother, Aximili joined the group when he was rescued by the kids from the wreckage of Elfangor's Dome ship, which fell into the Pacific Ocean. Initially considering himself an outsider, Aximili, or "Ax" as he came to be known, retained many of the traits and values of his people (which ranged from loyalty and discipline to outright ruthlessness and xenophobia), and the distinctions led to both comedic and insightful critiques on Earth customs. As the series progressed, it became apparent that he and the kids were more alike than different, and as he adapted to life on Earth Ax was forced, like his Earth counterparts, to question the principles that he had hitherto taken for granted.

Ax: We have seventeen minutes left.
Marco: (after a pause) Seventeen *minutes*?
Ax: (correcting himself) Seventeen of your Earth minutes.

  • Verbal Tic: As an Andalite, he has no mouth and communicates with thought-speak. Whenever he holds a conversation while morphed into a human, he can never go very long without repeating individual parts of words, often but not always drawing out their component sounds. SOU-nds. Sauw-nnnn-dss.
  • You Can't Go Home Again


Smirking, pouting, easily offended David. David, who half the time seemed to be reckless, but other times had been cowardly and quickly panicked. David, the new Animorph.

After finding the Morphing Cube and subsequently revealing its location, David became target number one for Yeerk forces who were searching to gain the morphing power. After a battle that destroyed his house, David's parents were taken by Yeerk forces. Frightened, alone and unable to trust anyone, David was given the morphing power by the others as part of an attempt to recruit him, but his growing resentment for them strained relationships within the group. Feeling that his life was threatened not only by the enemies that took his parents but also by the new strangers that now surrounded him, he revealed a sociopathic side and turned against the Animorphs attempting to eliminate them one by one.

  • Ambition Is Evil: David's self-serving nature is played in stark contrast to his heroic and selfless teammates. He progresses from wanting to use his powers to become a millionaire to plotting to create a new group of Animorphs.
  • Animorphism
  • Better Living Through Evil: He proposes using the morphing power to get rich. Later he plots to put this plan into action.
  • Big Badass Bird of Prey: His first morph is a golden eagle, by far the largest raptor any of the Animorphs have morphed thus far.
  • Blond Guys Are Evil
  • Choose Your Own Adventure: In Alternamorphs #02, the reader is cast as a thinly veiled Expy of David, to the point of paragraphs in the first three chapters being lifted verbatim from The Discovery. It's the closest thing David gets to a narrated book.
  • Cowardly Lion: Both figuratively in #20 and literally in #21. He largely gets over this after his Face Heel Turn.
  • Create Your Own Villain: Arguably pushed over the edge into villainy by Jake's threat on his life and being forced to sleep in a barn, unable to go out in public as himself. He even justifies his actions with an Ironic Echo of Tobias's own words.
  • Dangerous Deserter
  • Deal with the Devil: He makes one with Crayak to get off the hellish island the Animorphs left him on.
  • Dead Person Impersonation: Disposes of Jake and Rachel's mortally wounded cousin and takes his place.
  • Death Seeker: By the end, he's given up on revenge and begs Rachel to kill him, preferring death to going on trapped as a rat.
  • Divide and Conquer: His midnight plan to kill the Animorphs one by one. It almost works.
  • Even Evil Has Loved Ones: For all his faults, David seems to have genuinely loved his parents, going so far as planning to ransom the blue box in exchange for their safe return. He only abandons this plan when Cassie makes it clear it won't work.
  • Even Evil Has Standards: Despite bluffing the Animorphs with the threat of it, David never attempts to go over to the Yeerks, and by all accounts hates them as much as the Anis do.
  • Fate Worse Than Death: Trapped in rat morph for the rest of his life.
  • First-Name Basis
  • Flaw Exploitation: He rivals Marco in how good he is at this. When he turns on the Animorphs, he exploits Ax's ignorance of alarm clocks and Rachel's preconceptions about him to split them up and attack Rachel. He get a taste of his own medicine when the Animorphs subsequently exploit his ego and need to psychologically dominate Rachel to bring him down.
  • Grail in the Garbage: He was about to sell the morphing cube online before the Animorphs caught wind of it. Worse, he was about to unwittingly sell it to Visser Three.
  • Hallucinations: Blink and you'll miss it: Jake hallucinates a terrified rat-David in the Bad Future of The Familiar.
  • He Knows Too Much
  • Humiliation Conga
  • Identity Impersonator: In The Threat he acquires and morphs a Controller briefly. One book later, he's also acquired Marco and Saddler.
  • Karmic Punishment: They trapped the Sixth Ranger Traitor in rat morph. There's no way that wasn't deliberate.
  • Kick the Dog: Killing a random bird the instant he gets his golden eagle morph. He tries to pass it off as being taken over by the morph. Some of the Animorphs buy it, Marco does not.
  • King of Beasts: His lion morph. He defeats Jake's tiger in a one-on-one battle at the climax of The Threat.
  • Lightning Bruiser: Definitely favors these. His battle morphs for land, sea, and air - lion, orca and golden eagle respectively - all count.
  • Manipulative Bastard
  • Military Brat: His father was an NSA agent and he had to move around frequently throughout his life.
  • Mistreatment-Induced Betrayal: One gets the feeling that if the Animorphs had just sent David to live with the Chee instead of making him sleep in Cassie's barn that things might have worked out. Leaving him out of the biggest mission they've ever done up to this point and not, you know, threatening to kill him also would have helped.
  • New Transfer Student
  • Nobody Calls Me Coward: One of his main character flaws. He does stupid things to show off and look good, and totally loses his cool when Rachel calls him a coward.
  • Panthera Awesome: His main battle morph is a lion.
  • Plug N Play Friends: A deconstruction.
  • Recurring Character: He was built up to the Villain of the Week for his trilogy and later returned for one last hurrah near the end of the series.
  • Rule of Pool: His house has a pool and Marco is envious of his good fortune. The pool comes into play again a book later, when Ax tricks a trio of Hork-Bajir into throwing themselves into it.
  • Screw This, I'm Outta Here: When he sees Jake morph a dragonfly in The Threat he says this, though he doesn't go anywhere.
  • Scaled Up: He morphs a rattlesnake in The Solution.
  • Screw the Rules, I Have Supernatural Powers: David's unique among the Animorphs in that he sees nothing wrong with using his powers for selfish ends. Ironically, he gets this idea from them in the first place.
  • Shapeshifter Mode Lock
  • Sixth Ranger Traitor
  • Sixth Ranger
  • Smug Snake: Like Marco, he can be interpreted as this.
  • Spot the Impostor: David morphs Jake's cousin, who is badly injured after being hit by a car and expected to die in surgery, and takes his place. Jake figures it out almost instantly, when "Saddler's" injuries are miraculously healed. Everyone else not in on The Masquerade fails miserably.
  • Surrounded by Idiots: In The Return. He manages to recruit two henchmen, but they're both bumbling idiots who ultimately end up turning on him.
  • Take a Third Option: Caught between the Animorphs and the Yeerks, neither of whom he trusts. He eventually turns on them both.
  • Took a Level in Badass
  • Tricking the Shapeshifter
  • Ungrateful Bastard: He's not too thankful to the Animorphs for saving his life. Whether this is just straight-out ingratitude or bitterness that they left his parents behind is never made clear.
  • The Unchosen One: Both literally and figuratively. He eventually decides to fight on his own terms, declaring both the Animorphs and the Yeerks his enemies. In The Return he is literally the unchosen one, as Crayak sets him up to be his weapon only to reveal he's just a tool being used to persuade Rachel to join him.
  • Unnamed Parents
  • Verbal Tic: David has a tendency to say the name of the person he's talking to several times in a single conversation, usually when he's trying to be threatening. In one occasion in The Solution, he says Rachel's name six times in one page.
  • What Happened to the Mouse?: A rare literal example.
  • With Great Power Comes Great Insanity: He goes from a relatively normal kid to an unflinching killer after gaining the morphing power.
  • Xanatos Speed Chess: David plays a pretty mean game of it until he starts carrying the Villain Ball, unless it's an Indy Ploy - we never know for sure if he's had it all planned out or just making it up as he goes along.
  • You Dirty Rat

The Auxiliary Animorphs

We trusted them and they did us proud.

When the Animorphs are finally uncovered and forced to go on the run, they decide to recruit some fresh blood in case they are killed. Rationalizing that the Yeerks would have no use for handicapped hosts, they do their recruiting at a children's hospital. Enter the Auxiliary Animorphs.

  • Action Girl: Collete, Kelly and Erica.
  • Animorphism
  • Cool Cat: Timmy's battle morph is a bobcat.
  • Continuity Drift: One of them, Timmy, is referred to as Tuan in a later book.
  • Cute Bruiser: Collete
  • Disability Superpower: They master morphing a lot faster than the kids originally did. Cassie theorizes this is because, while their bodies are weaker, their minds are stronger.
  • First-Name Basis: All of them.
  • Fragile Speedster: James, like Jake, has a peregrine falcon flight morph.
  • Handicapped Badass
  • Killed Off for Real: All of them.
  • The Leader: James, like Jake, is a Type II personality with a Type IV style of leadership.
  • Mauve Shirt
  • Never Smile At a Crocodile: Collete's battle morph is a crocodile.
  • Opt Out - Right before the final battle, a lot of the Auxiliary Animorphs decide that they want to sit it out, due to the fact that their friend Ray was recently killed. Jake doesn't really care and makes them go anyway. ("We didn't give them morphing power so they could have fun flying around. This is when we need them. All of them. You're their leader, James, so lead.") They then all get killed.
  • Panthera Awesome: James's battle morph is a lion.
  • Recurring Character: They appear in The Ultimate, The Absolute, The Sacrifice and The Answer.
  • Sacrificial Lion
  • Suicide Mission: Jake sends them on one to buy the Animorphs time to take over the Pool ship.
  • Supporting Leader: James, the leader of the Auxiliary Animorphs, is this to Jake.
  • Throwing Off the Disability: James was injured in an accident, so he is healed by the morphing power. Most of the other auxiliaries aren't so lucky.

Yeerk Empire

Visser Three (Esplin 9466 the primary), later, Visser One

He looked so much like Ax. So much like Prince Elfangor. And yet, so totally different. The difference wasn't something you saw. It was something you felt. A shadow on your soul. A darkness that blotted out the light of the sun. Evil. Destruction. His body was an Andalite. He was the only Andalite-Controller in existence. The only Yeerk ever to infest an Andalite body. The only Yeerk with the Andalite power to morph. Visser Three.

The only Yeerk to ever infest an Andalite, Esplin 9466 Primary, in his time as Visser Three, was put in charge of operations on Earth. Though he carried out the orders of his superiors and employed the strategy of infiltration and subversion suggested by his rival Visser One, his violent and impulsive personality lent itself more brutal tactics. A long-time proponent of a strategy of open war, his efforts to be promoted to Visser One were stymied by his inability to capture or kill what he believed to be "Andalite bandits", and his growing obsession with the Animorphs paved the way for his descent into insanity and paranoia.

  • 0% Approval Rating: He is universally hated and feared among his fellow Yeerks. Not that he needs their approval.
  • Aliens Are Bastards: Boy is he ever!
  • Animorphism
  • Asskicking Equals Authority
  • Authority Equals Asskicking: One of the reasons he's still in power.
  • Ax Crazy
  • Bad Boss: He could well be the Trope Namer. Not only does he sarcastically mock his subordinates, but he kills them for little-to-no reason. Didn't kill the Animorphs? Decapitated. Made a mistake? Decapitated. Interrupted the Visser? Decapitated. Closed a door too slowly? De-fucking-capitated. You can't win with this guy, to the point where Yeerks pass over promotions because it means having to work with Visser Three, and therefore probably being decapi-SLASH- *thud*. Lampshaded: Jake points out that Visser Three's tendencies to kill his subordinates make them hate and fear him, making him (and them) less effective. He also says that that gives the Animorphs an advantage over him.
  • Big Bad: Played with in that, while he is the primary antagonist of the series and is quite high up in the Yeerk hierarchy, there are still two Vissers and the Council of Thirteen above him. However, he is ultimately promoted to Visser One. And in one Bad Future, he works his way up to Emperor.
  • Big Damn Villains: In The Mutation.
  • Bigger Is Better: A philosophy he subscribes to wholeheartedly. Subverted in The Arrival, when he finally realizes bigger is not always better and morphs a small creature to avoid being assassinated.
  • Blob Monster: One of his morphs in The Return. Rachel aptly describes it as 'Killer Jell-O'.
  • Bond One-Liner: He gets a few good ones.
  • Breath Weapon: His most powerful and only recurring morph, the eight-everythinged creature seen in The Invasion and The Resistance, breathes fireballs from each of its eight heads.
  • The Brute: He only knows one tactic—Hit the enemy with everything you've got until it's dead.
  • The Caligula
  • Card-Carrying Villain: He got this way when handled by the ghostwriters. See The Extreme and The Illusion for good examples.
  • Combat Tentacles: More than a few of his morphs feature them, most notably the Lerdethak from The Forgotten and the unnamed monster he morphs in The Ultimate.
  • Cruel Mercy: After he's finally beaten, he's robbed of his prized Andalite body and forced to live out the rest of his natural life in his natural Yeerk state, blind and helpless. For Visser Three, who was in love with the sense of sight, this is very fitting.
  • Curb Stomp Battle: Most of his fights with the Animorphs end up like this.
  • Cyclops: In The Sickness he morphs a creature that's basically a giant, tentacled eyeball.
  • Dishing Out Dirt: In The Visitor he morphs a three-legged, twenty-foot tall creature that's strong enough to rip up chunks of cement from the ground and throw them.
  • Enemy Mine: Teams up with the Animorphs to escape The Nartec in The Mutation.
    • Don't forget when he (however briefly) teams up with the Animorphs against the Aliens With Big Egos. I am, of course, referring to the Helmacrons.
  • Dragon-in-Chief: Sort of; he is subserviant to the Council of Thirteen, but is much more "hands-on" and thus threatening. He's also in charge of the invasion of Earth, so he is the main enemy.
  • Evil Gloating: He's a master of this. Read The Threat for the most triumphant example.
  • Evil Overlord
  • Evil Tastes Good: He has two morphs, the Anatarean Bogg and Vanarx, specifically devoted to this.
  • Fate Worse Than Death: His fate is being contained in a custom made prison without a body for the rest of his life, helpless and without sight. For a power hungry monster like Visser Three who was in love with the sense of sight, this is most certainly one of these.
  • Feathered Fiend: In The Decision he attacks Ax as a kafit bird, a Big Badass Bird of Prey from the Andalite home world.
  • Giant Enemy Crab: In The Reunion he morphs an alien chameleon crab.
  • Giant Flyer: He's got two known morphs that fall under this banner: the Bievilerd from The Revelation and an unnamed monster described as something like a giant winged porcupine pterodactyl in The Underground.
  • Giant Squid: The last morph he ever uses is one of these, seen in The Sacrifice. He may have used it before in The Mutation.
  • General Failure: When it comes to the "Andalite bandits", anyway. That said, don't attack him head on, as you will die a very painful and horrific death.
  • Graceful Loser: Very surprisingly done at the end. He surrenders to the Animorphs without a fight and leaves his host willingly.
  • Hollywood Acid: Two of his morphs have been known to use it: the Kaftid he morphs in The Pretender and an unnamed morph from The Return that's described as a giant alien alligator gorilla.
  • Humiliation Conga
  • The Juggernaut: In The Message he chases the kids as a giant, untiring Sea Monster called a Mardrut. They're only saved by the fortuitous arrival of magic talking whales.
  • Kill It with Fire: He's fond of this. In the first book he morphs a monstrous, unnamed eight-headed creature and in The Mutation he morphs the Luminar, a blazing creature that can flash-fry its enemies by pointing a finger. Hasbro must have caught on to it, because the first Visser Three toy transformed into a form never seen in the books dubbed the Inferno Beast.
  • Know When to Fold'Em: See Graceful Loser above.
  • Large Ham / Chewing the Scenery / No Indoor Voice: Something of a Running Gag; every time it is explained that thought-speak can be sent to one person or a few, that's when the Visser ANNOUNCES HIS PRESENCE TO EVERY PERSON IN RANGE!
  • The Leader: Type III.
  • Muck Monster: He's got two known morphs like this, one seen in The Weakness and the other in The Hidden.
  • Multi-Armed and Dangerous: The unnamed creature he morphs in The Threat. All we know about it is that it is 'dark and large and has more arms than it should'.
  • Names to Run Away From Really Fast: Among Andalites, he is known as 'The Abomination'.
  • No One Could Survive That: The actual Yeerk Esplin 9466 has made a shtick out of surviving against impossible odds. See The Andalite Chronicles, The Hork-Bajir Chronicles, and The Alien. He also survives the war, which is no mean feat when you consider how many people want him dead.
  • Off with His Head: His preferred method of execution.
  • One-Winged Angel: He has a menagerie of monstrous morphs he's acquired from across the galaxy.
  • Plant Aliens: His Lerdethak morph from The Forgotten.
  • Prehensile Hair: In The Suspicion he morphs a Medusa-like creature with scythe-tentacles for hair.
  • Puppeteer Parasite
  • Sea Monster: In The Escape he morphs a bright yellow alien sea serpent. His Lebtin Javelin Fish from The Reaction and and Mardrut from The Message also count.
  • Shoot the Messenger: All the goddamn time.
  • Spike Shooter: In The Reaction he morphs a Lebtin Javelin Fish, a kind of manta ray that fires spears from its mouth. His Dule Fansa also shoots spikes from its four arms.
  • The Starscream: To Visser One. He succeeds eventually
  • Start of Darkness: The Hork-Bajir Chronicles probably counts, since aside from Dak and Alrea's story, about a third of the novel is spent exploring his own back story.
  • Stronger Sibling: Labeled as such at birth, hence his 'primary' designation.
  • Stupid Evil: It's only most of the way through the series when he even begins to suspect that the Animorphs are human.
  • Torture Technician: In The Extreme it's revealed that he collects torture devices from around the universe.
  • Vertebrate with Extra Limbs: In The Discovery he morphs a purple four-armed beast called a Dule Fansa, variously described as an 'evil Barney' and 'Hitmonchan with traffic-cone arms'.
  • Villain Decay: Suffers from it, due to being the main villain for the entire series. Even more extreme if you read the Hork-Bajir or Andalite Chronicles, in which we see his beginnings as a very capable Manipulative Bastard, and long before his degeneration into the General Failure he is now. Despite this, fighting him head-on is still not a good idea.
  • Villainous Breakdown: His repeated defeats and humiliations at the hands of the Animorphs take their toll.
  • Villainous Rescue: Without him those kids would have been screwed by the Nartec.
  • With Great Power Comes Great Insanity: And how!
  • You Have Failed Me...: A lot. Visser One notes that he's executed subordinates "by the poolful," which basically means thousands or more. He does this so reliably that Marco's able to bluff his way out of a situation where three flunkies were expected by saying, "I think Visser Three killed them for doing something wrong". He chastises himself for this, calling it the worse lie he's ever told, only for it to be believed.
  • You Have Outlived Your Usefulness: He has a form devoted to this, a Vanarx, which can suck the Yeerk out of its host and eat it.

Visser One (Edriss-Five-Six-Two)

I took a human host and learned about the planet and humans, and because of that I was able to begin the invasion that you have now endangered with your criminal incompetence! ...You want to be Visser One? You want to take my title? We shall see.

Cold and calculating, it was Edriss 562 who suggested the strategy of infiltration that defined the war for the majority of the series, after years of living amongst her enemies (under the guise of Marco's mother Eva). Though she punished failure harshly, she also rewarded well for success, and her calm and collected tactical abilities made her a star in the eyes of the Council.

Hedrick Chapman (Iniss-Two-Two-Six)

Sorry I skipped class, Mr. Chapman, but I've been in this lizard body, watching you because I know you're a Controller and part of a giant alien conspiracy to take over the earth.

Assistant principal at the school attended by the Animorphs and a prominent Human-Controller, he and his wife became Controllers to protect his daughter Melissa from infestation. One of the more frequently-recurring antagonists, he has a prominent role in The Andalite Chronicles as a villain, contradicting everything about him learned up to that point.

Joe Bob Fenestre (Esplin 9466 the lesser)

My brother, my twin, is the prime. To him go the best assignments, the best hosts, the rank, the power, the glory. And to me, only what I can take. Well, that wasn't good enough. I wanted more. And if I couldn't have it as a Yeerk, I'd have it as a human.

The billionaire owner of Web Access America and mastermind behind a web site devoted to exposing Yeerks, the Animorphs seek him out to learn if he is friend or foe. It turns out he's a Controller, but no ordinary Controller - he is in fact the twin brother of Visser Three, a lowly Yeerk who amassed a personal empire by allying with his host.

Karen (Aftran-Nine-Four-Two)

You tell me what you think I should do. Andalites, humans, there's no difference: You're both smug, moralizing, superior races. You both live in beautiful worlds. You have hands and eyes and the freedom to move about wherever you like. And you hate us for wanting all those same things.

A low-ranking Yeerk assigned to the daughter of a billionaire banker. By chance she observes Cassie leaving a battle and begins to follow her, convinced she has some connection to the Andalite bandits. Due to a series of unfortunate circumstances, they get stranded together in the woods and Aftran learns Cassie's secret, forcing Cassie to face the other side of the war head on.

John Berryman Jr. (Visser Four)

One doesn't want mere baboons blundering about with Time Matrices, does one? Who knows what damage a fool with such power may do?

The commander of the Yeerk invasion of Leera, Visser Four is demoted and assigned lowly actor John Berryman as punishment after the Animorphs thwart his plans in The Decision. While on Earth he finds the Time Matrix and attempts to use it to alter history in his favor. He's the main villain of Megamorphs #03: Elfangor's Secret.

  • Big Bad Wannabe: After getting the Time Matrix, his goal is to rewrite all of history to favor the Yeerks. In practice, what he achieves is decidedly less impressive. He screws up history and makes an annoyance of himself, but never really accomplishes anything. Lampshaded by the Drode, who refers to him disparagingly as a 'mere baboon' with no idea what he's doing.
  • Butterfly of Doom
  • Conflict Killer: Visser Four is unique in being the only threat in the series that forces Crayak and the Ellimist to agree to a truce, however temporary.
  • Dirty Coward: He spends the whole book basically running from the heroes and flees his host after he's crippled.
  • Drunk on the Dark Side
  • Early-Bird Cameo: He's first mentioned (though not seen) in The Decision.
  • Evil Gloating: When Rachel's shot to pieces in front of him in the Battle of Trafalgar. It doesn't stick.
  • Godwin's Law of Time Travel
  • Hitler's Time Travel Exemption Act
  • Kill It with Fire: After the Yeerk crawls out of his crippled host, Marco grabs him and throws him into the wreckage of a burning tank, saying his only choices are to starve or burn.
  • Powder Trail: He uses this to blow a hole in HMS Victory.
  • The Power of Acting: Aside from the Psychic Static John Berryman uses it for, Visser Four uses his host's experience to more effectively disguise himself. He blends in well at Agincourt and Traflagar, but abandons disguise after that as the Animorphs already know what he looks like.
  • Psychic Static: John Berryman Jr. thinks Henry V at Visser Four so much so that the very first thing he does when he finds the Time Matrix is try to change the result of the Battle of Agincourt so that Shakespeare would never be inspired to write it.
  • Puppeteer Parasite: Visser Four.
  • Ret-Gone: John Berryman Jr's final fate.
  • Time Machine: The Time Matrix
  • Villain of the Week
  • Villainous Friendship: The Andalite traitor in The Decision says Visser Four and Visser Three are 'such good friends'. If that's true, Esplin's influence wasn't enough to keep him from being demoted after losing Leera.
  • What Happened to the Mouse?: When the Animorphs erase Berryman from history, Visser Four is spared - all that changes in his history is that Berryman never becomes his host and he never gets the Time Matrix. Despite this, he never appears again.

Taylor (Sub-Visser Fifty-one)

Join me in my madness, Andalite.

A sadistic Yeerk sub-visser responsible for capturing and torturing Tobias. Later gets the kids involved in a plot to murder Visser Three in revenge for her demotion. It turns out to be a trap meant to eliminate both the Animorphs and the Yeerk Peace Faction.

  • Alternate Character Interpretation: In-universe. Tobias sees her as a badly, badly Broken Bird, and feels a lot of pity for her, even empathising to a degree, despite being absolutely terrified of her. Rachel, on the other hand, sees the girl as a Complete Monster who made her choices and deserves to burn for them. The truth is somewhere in the middle.
  • Arch Enemy: To Tobias.
  • Agony Beam: Uses one on Tobias.
  • Ambition Is Evil: Even more than Visser Three.
  • Arm Cannon: Not quite, but her prosthetic arm does fire darts and emit gasses that are capable of paralysing the target. And she may have an actual cannon or grenade launcher in there; it's unclear whether she used a handheld Dracon beam or an integral weapon to destroy the natural gas pipeline.
  • Artificial Limbs: One of Taylor's arms is a prosthetic, as is one of her legs.
  • Axe Crazy: Makes Visser Three, Crayak, and a whole host of alien monsters look stable by comparison.
  • Blondes Are Evil: Are they ever!
  • Cold-Blooded Torture: Tortures Tobias.
  • Dark Action Girl: Taylor would rather manipulate than fight; she's nowhere near the Badass that Rachel can become, and maybe not even at Cassie's level. But the girl can still take and dish our far more damage than you would expect her to be able to, and seems to be one of the few Yeerks who didn't get her training at the Imperial Stormtrooper Marksmanship Academy. In Book 43 she's able to take out the entire team (minus Cassie and Tobias) when she catches them by surprise, and fights a Taxxon-morphed Tobias on a fairly even basis. Not bad for a (relatively) normal girl.
  • Deal with the Devil: Taylor the Girl made one with the Yeerks in order to be pretty again. It involved selling out herself and her mom. Taylor the Yeerk makes another one with Visser Three following her demotion from sub-visser, becoming part of his plot against the Animorphs and the Peace Faction in return for promotion. And the Animorphs make one with her in order to try and assassinate Visser Three.
  • Don't You Dare Pity Me!: Can verge on this, when she's not using her situation to her advantage.
  • Double Consciousness: Literally, sort of; see Humanity Is Infectious below.
  • The Dragon: To Visser Three, apparently.
  • Electronic Eyes: Her entire skull has been replaced, bone by bone with steel. I think we can safely assume her eyes have been as well.
  • Evil Counterpart:
    • Tobias sees her as his. Like him, she's a damaged person from a lousy background, who became involved in the war due to alien intervention in her life. Like him, she has a lot of insecurites that prevent her from dealing with life, and Tobias frequently compares her decision to become a Controller to his own entrapment in hawk morph. Tobias, of course, is still a hero, whereas Taylor...well just look at the list of tropes she's associated with.
    • Also somewhat to Rachel, since both are blonde, immaculate-looking valley girl types capable of violence and associated with Tobias.
  • Femme Fatale
  • First-Name Basis: Taylor's last name is never revealed.
  • Foe Yay: Largely averted. It is possible to read her obsession with capturing and breaking Tobias (and some of the lines she says to him) as rather Foe Yay-y, but it requires you to ignore her personality. She's described as so cold, nasty, and downright insane that most of it comes off exactly the way it's supposed to: as the behaviour of an insecure, sadistic bullying bitch who doesn't like letting her victims get away. Yandere she ain't.
  • Hollywood Cyborg: She was healed by advanced alien technology.
  • Heel Face Turn: Taylor the Yeerk fakes one in order to bring the kids in on her plot. Taylor the Human pulls one in Book 43, temporarily taking control of her body in order to warn Tobias out of trusting her master.
  • Humanity Is Infectious: Taylor's human and Yeerk personalities seem to be closer than in most Controllers, making Yeerk!Taylor somewhat unable to differentiate herself from her host. Whether this is the cause or effect of her insanity (or both) is hard to determine.
  • Magic Plastic Surgery: Yeerk cybernetics were used in reconstructing her arm and face.
  • Manipulative Bastard: Plays mindgames with Tobias, tricks the kids into helping her plot to attack the Yeerk pool, and generally manipulates everyone's emotions for kicks and profit. She's good at it too, to the point where Tobias cannot get her out of his head.
  • Not So Different: Claims she and Tobias aren't in order to screw with his mind. On some level, he seems to believe her.
    • Specifically Tobias thinks about this in her first appearance, when it becomes clear that her perception of the human-Yeerk relationship is similar to Tobias' Double Consciousness about being a hawk.
  • Psycho for Hire: Or whatever the "gainfully employed by a megalomaniacal alien empire" equivalent is.
  • Puppeteer Parasite - Sub-Visser Fifty-one, who's actual Yeerk name is never revealed.
  • The Quisling
  • Recurring Character: Appears in The Illusion and The Test.
  • Self-Made Orphan: Spiritually at least. Part of Taylor's deal with the Yeerks involved allowing not only her own infestation, but that of her mother as well.
  • Sociopathic Soldier: Even for a member of the Yeerk military she's a twisted bitch.
  • Stockholm Syndrome: Causes it in Tobias.
  • The Only One Allowed to Defeat You: In The Test, Tobias is obsessed with proving that he is stronger than she is, and refuses to allow anyone else to kill or restrain her.
  • The Revolution Will Not Be Civilised: Subverted. She pretends to be a member of a Yeerk resistance movement in order to gain the kids' assitance in Book 43.
  • Robotic Torture Device: To which the Agony Beam is attached.
  • Torture Technician: Mentally, physically and emotionally.
  • Villain of the Week: Twice.
  • We Can Rule Together: Offers Tobias this deal in The Test. He turns her down.
  • Why Did It Have to Be Snakes?: Tobias almost shuts down when he runs into her again in The Test.

The Inspector

That's where this thing belonged. In a cartoon. Where the impossible is possible.

A candidate member for The Council of Thirteen, sent to investigate Visser Three's progress on earth. Is hosted by a Garatron, one of the Yeerk's "Newest and most capable host species." A real problem in The Weakness.

Tom Berenson (and his Yeerks)

I had to rein in a powerful desire to go after him. It's hard to conceive of the impotent rage you feel watching someone you love be reduced to a mindless puppet.

The real Thomas Berenson was the eldest son of Jean and Steven Berenson, and Jake's brother. Although three years older, Tom is described as almost identical to Jake in looks, though different in temperament. Growing up, Jake and Tom were extremely close, but Tom became more distant due to his infestation (prior to Elfangor's crash). His status as a Controller caused Jake a great deal of emotional suffering, as the latter saw it as his duty to rescue him.

Though he may have been infested by several Yeerks, the reader only meets two. The first was an overly-ambitious low-level grunt (Temrash 114) who was starved to death by the group after managing to infest Jake. The second was a much more dangerous and capable enemy who rose to minor success by becoming one of Visser Three's most capable lieutenants. After Visser Three refused to promote him past the rank of chief of security (a position he achieved despite a stunning failure to notice what might be the single biggest security breach in the war for months) Tom's Yeerk became sick of taking orders from superiors he percieved to be incompetent failures, and began scheming for ways to amass greater power for himself.

Tom: Oh, you're a surly bunch, aren't you? No one talks to me. No one but Rachel, who told me to... well, you can guess what Rachel told me to do.
Jake: Whatever she said goes for all of us.
Tom: Surly and unpleasant. Oh well.


Prince Elfangor-Sirinial-Shamtul

An Andalite general, military genius and war hero, Elfangor was made a household name for his contributions to the Andalite-Yeerk war effort. Though this was not generally known amongst his own people, he spent a great deal of time on Earth permanently morphed as a human: a sort of self-imposed exile after a miscalculation led to the infestation of his superior officer, Alloran. His longstanding and well-known subsequent rivalry with Visser Three ended with his death at the hands of the latter after a battle in Earth's orbit, though not before he was able to give the morphing power to Jake and his friends.


'Aristh...I mean, Warrior Arbron is a casualty of war.

One of Elfangor's fellow cadets from his days with Alloran. Gets trapped in Taxxon morph partway through The Andalite Chronicles.

War-Prince Alloran-Semitur-Corass

I will forever be Alloran, Butcher of the Hork-Bajir. Alloran, the only Andalite to ever be taken alive by Yeerks. But disgraced, even despised, for whatever I am worth, I am yours to command.

Visser Three's host, and formerly Elfangor's commanding officer. Perhaps the best example of the ruthless mentality of the Andalite military, Alloran was infamous even before becoming the only Andalite to ever be taken by a Yeerk. Disgraced and despised by even his own people, he becomes more humble and pacifistic during his time as Visser Three's slave.


No, I won't help you to understand. But I will help you kill Yeerks. That, I will do. I will help you kill them. And kill them. And kill them! And kill them all!

The daughter of the infamous Prince Seerow and heroine of the Hork-Bajir Chronicles. She makes a guest reappearance in The Prophecy.


The people must be led by the few who are willing to make the very hard choices. The people are happy in their ignorance. But we in the Apex Level cannot allow ourselves to be sentimental.

An Apex Level Intelligence Advisor and the biological brother of Alloran-Semitur-Corass. Veteran of over twenty conflicts, Arbat is assigned to the Andalite task force Unit 0, ostensibly tasked with the assassination of Visser Three. The true mission of Unit 0, known only to Arbat himself, is to unleash a deadly new biological weapon against the Yeerks. He appears only in The Arrival.

The Higher Powers

The Ellimist

We watched the rise of other species throughout the galaxy. Helped at times, when we could. We wanted companions. We wanted to learn. We imagined a galaxy filled with millions of sentient species, each with its own science and art, its own beauty.

An All Powerful Bystander introduced in the seventh book, the Ellimist is a being so powerful he can directly manipulate the fabric of spacetime, rewrite history, travel through time, and cross between dimensions. He ultimately wants the Animorphs to prevail and save Earth, but he is bound by the rules of the nebulous Game, which prevents him from offering direct assistance unless it's in a Deal with the Devil.

  • All Powerful Bystander: Not technically all powerful, but so close as to make little difference from human perspectives.
  • Ascended Fanboy: In-universe, as a mortal he was of a race called Ketran, and enjoyed playing complex simulation games where he helped lesser races grow by indirect assistance. Now that he's powerful enough, he's doing the exact same thing for real.
  • Ascended to A Higher Plane of Existence: He became the Ellimist when his bio-mechanical body of a small fleet of spaceships was drawn into a black hole, thereby causing him to exist in multiple dimensions at once. Even he isn't sure how that took him from what he was to a nigh-omnipotent being.
  • Balance of Good and Evil
  • Big Good
  • The Chessmaster
  • Complete Immortality
  • Cosmic Entity
  • Eldritch Abomination
  • Everyone Calls Him "Barkeep": His real name is "Toomin;" "Ellimist" was basically his screen name when he was a Ketran gamer.
  • A Form You Are Comfortable With
  • I Am Legion: Throughout most of his appearances he refers to himself in the plural, making it unclear if he is a singular entity or part of a collective, or even a race of creatures like him. It is eventually revealed he is a singular individual who absorbed millions of minds in a freak incident, explaining his predilection for referring to himself in the plural
  • Last of His Kind: He is the last surviving member of the Ketran race.
  • Leave Your Quest Test: He gives one to the Animorphs in The Stranger.
  • Little Miss Almighty: One of the forms he appeared before the group in.
  • Living Ship: During his Third Life.
  • Loophole Abuse: He's forbidden to interfere directly except when he makes a deal with Crayak, but gets around it by sneakily arranging for them to realize things on their own that they wouldn't have without him. This is actually the defining trait of him in his first appearance, where he shows the Animorphs a vision of a Bad Future, and a background event clues them in to the location of the Yeerk Kandrona in the present.
  • Manipulative Bastard
  • Million-to-One Chance: His evolution from Ketran gamer to demigod is due to a series of freak accidents, each more improbable than the last.
  • Mysterious Backer: He tries to help the heroes, but he is either too roundabout in his methods to really gain their trust or too caught up in his game with Crayak to help at all.
    • The last Megamorphs heavily implies that the team basically exists because he arranged things from behind the scene, including the Contrived Coincidences of getting members who were already unknowingly connected to the conflict in some way.
  • Pointy Ears: In his favored form.
  • Reality Warper
  • Recurring Character: He appears in a handful of books, but his influence is felt in many more.
  • Sufficiently Advanced Aliens
  • Time Stands Still
  • What If God Was One of Us?: In the Ellimist Chronicles he places part of his essence into the body of an Andalite and lives among early Andalites in order to reconnect with his sense of mortality.
  • Wizard Beard
  • You Cannot Grasp the True Form


I will cleanse this galaxy of all life. Then, when no sentient thing is left alive, I will kill you, Ellimist. That's my game. Shall we play?

Foreshadowed early on, the Crayak remains a mystery until halfway through the series, when the Ellimist reveals his story. A being of power equal to the Ellimist but with very different goals, the Crayak is a malevolent being chased from his home galaxy by the one power in the universe that can defeat him. He seeks extinction on a galactic scale, and eventually the ability to control all of space-time as his own.

  • All Powerful Bystander: Like the Ellimist, he is not truly all powerful, but he is so close it makes little difference from a human perspective.
  • Bad Boss: Towards the Drode. Though he serves loyally, Crayak is fully prepared to let Rachel annihilate him if it means securing her loyalty.
  • Bigger Bad: The war against the Yeerks, it's just a move in his game.
  • The Chessmaster
  • Complete Immortality
  • The Corrupter: He plays this role to Rachel, tempting her with godlike power in exchange for murdering Jake.
  • Cosmic Entity
  • Create Your Own Villain: The Ellimist ascended into his godlike state before Crayak did and had a chance to destroy him before he also achieved semi-omnipotence. He didn't.
  • Cyclops: Even before ascending, Crayak's original form was a monstrous, one-eyed creature.
  • Early-Bird Cameo: Shows up with no explanation as the Yeerk dies in Jake's brain in The Capture.
  • Eldritch Abomination
  • Evil Counterpart: To the Ellimist.
  • Evil Is Petty: After The Attack he spends most of his time coming up with ways to punish Jake for what he did to the Howlers.
  • Faceless Eye
  • For the Evulz: He massacres entire species and enjoys the suffering and torment of others... because hey, it's something to do. When he and the Ellimist first acquire their near-omnipotent powers, the Ellimist suggests that since they're incapable of killing each other now and can just undo any damage the other does to the galaxy, they could call a truce and just watch the advance of evolution. Crayak refuses because he finds the idea boring.
  • Giant Eye of Doom
  • God of Evil: He comes across as this, especially since unlike the Ellimist his backstory is never revealed. Additionally, the author admitted to modeling him after personifications of 'pure evil' such as Sauron from The Lord of the Rings.
  • I Lied: To David. He promises him revenge against Rachel, but merely uses him as a tool against her.
  • Leave Your Quest Test: Playing up his role as the Ellimist's Evil Counterpart, Crayak extends Jake an offer to alter history so he never met Elfangor. Jake accepts this offer, and it's the basis for Megamorphs #04.
  • Living Ship: He first appears to the Ellimist as this.
  • No Indoor Voice: Similar to Visser Three, he communicates with a form of thought-speech. Jake describes it as sounding like he's screaming at the top of his lungs.
  • Omnicidal Maniac: "I play the game of genocide..."
  • Reality Warper
  • Recurring Character: Though his presence is often felt, the Crayak himself only personally appears in The Attack and The Return.
  • The Social Darwinist: His goal is to pit race against race, the winner growing stronger with each engagement, until only one species is left, which will then revere him as a god.
  • Someone Has to Die: He agrees to help the Animorphs follow Visser Four through time in Megamorphs #03. In return, he demands that one of their number must die. Jake ends up biting the bullet, but it doesn't stick.
  • Sore Loser
  • Sufficiently Advanced Aliens
  • Talking in Your Dreams: He appears to both Jake and Rachel in dreams.

The Drode

Yes, yes, oh yes. Mustn't upset the balance. Not directly, anyway. But! Create problems? Yes. Create opportunities? Yes. Play the wild card? Of course.

An alien being who resembles a humanoid dinosaur, he serves Crayak and acts as his representative. He has incredible powers, presumably a gift from his master.

The One

You have done well to come this far. You have come to find your friend. But the Andalite is part of me now. As you will soon be.

A Giant Space Flea From Nowhere that shows up in the epilogue of the final book. He gathers the remnants of the shattered Yeerk Empire under his aegis and plots to assimilate the Animorphs into his being. The book ends with the Animorphs ramming his ship and the outcome of the conflict is never revealed.

Everyone Else

Erek King

This will be a meeting of allies, Marco. You see, we, too, fight the Yeerks.

Erek King was a member of the Chee, a race of ancient androids that had been living in secret on Earth for thousands of years. He revealed the existence of his people to Marco after it became apparent that they were both secretly fighting for the same cause. Though he was at heart a pacifist and found physical violence abhorrent, he and other Chee helped Animorphs in their missions by gathering information and providing alibis.


She's a million light-years from her home, Arbron. Confronting species she never knew existed. Suddenly thrust into the middle of an intergalactic war. I think she is very brave.

The heroine of The Andalite Chronicles and Elfangor's love interest. She's Tobias's mother.

Toby Hamee

A fool is strong so that others will see. A wise person is strong for himself. The Hork-Bajir will be strong for the Hork-Bajir. That way, when the Yeerks are all gone, we will still be strong.

The daughter of the first two free Hork-Bajir in generations, Toby Hamee is a seer, a rare anomaly among Hork-Bajir born with genius-level intelligence. Her keen mind and charisma quickly elevate her to leader of the free Hork-Bajir.

Queen Soco

I will discover the truth, Surface-Dwellers. Have no doubt of that. But I am also a magnanimous queen. Feel free to further explore the Nartec world. We will meet again later. Perhaps.

Queen of the Nartec, a villainous group of merpeople encountered in The Mutation. She plots to take her people into a war with the surface world, but hasn't reckoned on the Animorphs... or Visser Three.

General Sam Doubleday

See the stars on my shoulder there, son? I'm a major general, U.S. Army. You're a kid who can turn into a bug. I take my orders from the chain of command, and that ain't you.

A three star-general and the leader of ATF-1 (Alien Task Force One), the U.S. Army's answer to the Yeerk invasion. He doesn't take kindly to Jake and the kids at first, but agrees to help them after he's been brought up to speed.

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