Heroes and Anti Heroes
- Affably Evil
- Annoying Younger Siblings: But one could also say they're just plain awesome.
- Anti-Hero: From the second book onwards. A Type IV in the second book, developing into III or II in the third and being cemented as such in the fifth.
- Blue Eyes: A bright, piercing blue that he shares with his father.
- The Chessmaster: He's quite the schemer and planner, coldly moving people like chess pieces.
- Child Prodigy / Teen Genius: A preteen genius in the first book.
- Cool Shades: A Justified Trope, given they can dispel the mesmer.
- Creepy Child
- Noble Demon: Spelled out by Holly: "Deep beneath the layers of deviousness you have a spark of decency. Perhaps you could blow on that spark once in a while". Artemis says he might consider that.
- Eerie Pale-Skinned Brunette: It's one of the reasons he's described as 'a vampire' when he smiles.
- Enemy Mine: In the second book, where he teams up with the fairies in order to track down the source of the goblin batteries, and the third book, where he requests their assistance after Butler is shot.
- Enfante Terrible: He's 12 in the first book but it's implied that he was like that for years before the start of the book.
- Even Bad Men Love Their Mamas: His mother is a Morality Pet in the first book as he genuinely cares for her and takes care of her. He even parts with half his hard earned gold to cure her insanity.
- Even Evil Has Standards: Even when a Villain Protagonist, Artemis would not stand for mistreatment of the environment. He also abandons kidnapping schemes at Butler's request after their first tangle with the fairies, when they discover how human they are.
- Evil Plan: In the first book, it's extorting gold from fairies to rebuild his father's criminal empire. Starting with the second book, his plans become less evil.
- Friendless Background: Butler is more like a father that takes orders than a real friend. There's a real Tear Jerker in The Artemis Fowl Files, where it is revealed that he used to keep sweets in his limo in case he ever made friends.
- Geek Physique: The only muscle he cares about is his brain. The rest of him is scrawny.
- Gender Blender Name: Artemis is the Ancient Greek goddess of archery, the moon, and hunting (though he claims the name itself is a genderless noun in Greek). There's an awesome moment in EC where Artemis uses this to deliver a code phrase, as he's explaining to Spiro about his name.
- Meaningful Name: His last name may be a reference to Guinea Fowl, one of the animals associated with his namesake—the goddess Artemis, and is said to be her favorite animal.
- Guile Hero / Magnificent Bastard: He is as triumphant an example of both tropes in his time as a Villain Protagonist and Anti-Hero as to rival Kane himself.
- Intelligence Equals Isolation
- Lonely Rich Kid
- Mismatched Eyes: After he and Holly accidentally trade eyes during the Time Travel sequence in book five.
- Nerves of Steel: In The Lost Colony, after Holly was fatally stabbed, he was able to keep himself together enough to maintain the bomb's erratic countdown in his head and figure out the exact moment to act to retroactively prevent her death -- all while they were under assault by a horde of demons.
- Overlord, Jr.: Albeit one whose overlord is missing in Russia.
- Pet the Dog: His treatment of the endangered lemur in book six is probably the most prominent example. Also, in book three, his (begrudging) decision to donate Spiro's billion dollar fortune to Amnesty International, with 10% going to the Fowl Estate as a finders fee, and his request for Holly to heal his mother in book one.
- Pragmatic Villainy: Fairies speculate that Artemis only healed his mother because he didn't want social services interfering in his plans.
- Ship Tease: With Holly starting in book 2. He thinks of her as being 'pretty in a dangerous way. Black widow pretty.'
- Shoot the Dog: In the Time Paradox, with the lemur. Subverted in that he actually saved it, but didn't remember doing so.
- Smart People Play Chess
- The Southpaw: Ambidextrous, but favors his left hand. Orion favors his right.
- Split Personality: Orion.
- Villainous Breakdown: Starts in the first book, around the time he says "I don't like lollipops".
- Villain Protagonist: In the first book.
- Wicked Cultured: A villain with taste in fine arts and architecture.
- "Well Done, Son" Guy: A major motivation for his villainy.
- We Want Our Jerk Back: In the seventh book.
- What The Hell, Villain?: At the end of the first book, Butler calls him out on kidnapping the very human-like fairies and using his mother as an unwitting test subject for an experimental escape mechanism from a fairy superweapon.
- Wise Beyond Their Years: At thirteen, he'd already done enough to earn an active file from Interpol.
- Ace Pilot
- Action Girl: Recon officer.
- Antagonist in Mourning
- Badass in Distress: When Artemis kidnaps her. Not completely helpless, but still a prisoner.
- Brainwashed and Crazy: For a short time in book 7.
- Cowboy Cop / Military Maverick
- Dark-Skinned Redhead
- Deadpan Snarker
- Deuteragonist: Just in the first book, her actions form half the narrative. In fact, one could chop off the first couple chapters and it would look like she was the main character.
- Fiery Redhead
- The Gunslinger: Handy with a ray gun. She can toss a coin fifty feet, at night, and shoot a hole in it.
- Good Is Not Nice: Heroic to the point of helping her enemies against trolls, but not exactly polite or kind.
- Hazel Eyes
- Hero Antagonist: In the first book, she's the honest cop doing her job, while Artemis is the criminal mastermind endangering her society for his own greed.
- Mismatched Eyes: See Artemis' entry.
- Older Than They Look: She's eighty years old in the first book.
- Redheaded Hero
- Aloof Big Brother: To Juliet, as well as Artemis.
- Anti-Villain / Punch Clock Villain: In the first book. He really wasn't kidnapping fairies For the Evulz; he was just doing his duty in serving Artemis, even calling him out on various occasions.
- Badass: Oh so very, very much. He can punch out a troll.
- Badass in a Nice Suit
- Bald of Awesome, Bald of Evil
- Battle Butler: Not only is he a perfect example, being an armed martial artist and personal attendant, the Butler family is the origin of the word "butler".
- Big Brother Instinct: Juilet's safety is his highest priority. It overrides his training and Artemis' orders.
- Big Brother Mentor: Oh yeah. Taught Juliet judo when she was six.
- Brother-Sister Team: With matching black designer suits.
- Did You Just Flip Off Cthulhu?: His response to being mesmered by a magically empowered Opal Koboi and ordered to kill Artemis? Go to Hell!
- The Dragon: To Artemis, in book one.
- Genius Bruiser: He's huge because of muscles and an expert in anything military (weapons, tactics, etc).
- Husky Russkie: In Name Only, mind you. He's technically Eurasian, and is very culturally neutral thanks to his training.
- Legacy of Service: His family's been with the Fowls since the Third Crusade, and every time a new baby is born they're assigned a Butler to care for them. Naturally, the Fowls are rather attached to them.
- Midnight Blue Eyes: In the first book, a man looks into them and notes that "they were a deep, dark blue, almost black. There was no mercy in those eyes."
- My Master, Right or Wrong: He doesn't really care what Artemis is doing because it's his duty to help him do it.
- Real Men Wear Pink: He apparently likes romantic comedies, his favorite film being Some Like It Hot. He reads romantic novels when nobody is around, though he would never admit it.
- Younger Than They Look: After being bought back to life by Holly Short, he was aged by 15 years, meaning that he was physically 55 at the age of about 40.
"By the time she was fourteen, Juliet was a third-dan blackbelt in seven disciplines, could dissemble and reassemble any weapon blindfolded, and could do her makeup in under four minutes."
- Badass in a Nice Suit: In book three.
- Battle Butler: Steps in for her big brother in book three.
- Braids of Action
- Brother-Sister Team: With matching black designer suits.
- Cute Bruiser: A particularly hilarious example is her playing dumb-blonde teenager for Pex and Chips in The Eternity Code and then knocking them both out.
- It Runs in The Family: As a Butler, she's just as kickass as her brother.
- Legacy of Service: She was able to step in for her brother.
- Morality Pet: She's the only one allowed to laugh at Butler and one of two people allowed to called Artemis 'Arty'.
- Never a Self-Made Woman: In the first three books, when all she wants to do is live up to the Butler legacy. Unfortunately, between her decision to make her own name coincides with a Retcon and she then runs off to join a lucha libre troupe.
- Professional Wrestling: Juliet's a big fan, and she runs off to join a lucha libre troupe after the third book.
- And then the sport itself appears in the seventh book when she and Butler fight off an attack during a show.
- Put on a Bus: After The Eternity Code, she goes off to become a pro-wrestler.
- The Bus Came Back: The Atlantis Complex.
- Took a Level in Badass: When she returns in book 3.
- Badass Moustache
- Da Chief: Of Recon and is always quick to reprimand his officers for breaking rules.
- Four-Star Badass
- Good Is Not Nice: He's a good guy but he has a temper like a volcano.
- Good Smoking, Evil Smoking
- Go Out with a Smile
- In-Series Nickname: He's known as 'Beet Root' as a pun on his name and temper.
- Jerk with a Heart of Gold
- Obi-Wan Moment
- Reasonable Authority Figure: Understands the need for procedure but also for adapting to the situation. Its stated he won't believe anything without evidence, thus implying he'll give anyone the benefit of the doubt if they have it.
- Retired Badass: Until the third act of book one.
- Smoking Is Cool: Played with. Iconic as his cigars are, they are described as "noxious fungal cigars" and annoy everyone else.
- They Call Me Mister Tibbs: He isn't very fond of people calling him "Julius".
- Vitriolic Best Buds: With Mulch apparently. He's testified against him "15 times" and calls him 'convict' but when Mulch fakes his death Root is immediately sad and called him "One of the constants of his life." Mulch for his part calls him by his first name and doesn't much of a grudge for the '15 times' thing.
- Big Damn Heroes: To Artemis and Holly in the Eleven Wonders Exhibition in book four.
- Big Eater: Party-size sherry trifle, a bottle of Moet champagne, a chicken, a t-bone steak, fruitcake, a Pavlova, a whole rack of lamb in one bite, two baguettes, a coctail of dairy products... and that's just the part of one meal actually described. Then there's the whole issue of super-fast tunneling via eating dirt and expelling it.
- Boxed Crook: In the first three books. He joins relatively of his own volition later.
- Deadpan Snarker
- Gasshole: He tunnels by eating dirt and his method of disposal and propulsion is this trope.
- Fartillery: He can uses his gas a method of attack. Its descriped as a 'mini-cylcone' and 'dozens of sledgehammers'.
- Genius Bruiser: While not on the same level as Artemis (duh), he is quite crafty and good at what he does. Even Artemis can't match him in geology. He is also fully capable of biting anyone's head off... or blowing it off with Fartillery.
- Kansas City Shuffle: By refusing to help Root in book 1 he tricks Da Chief into thinking he wants a lighter prison sentence, when in fact he plans to escape outright. Then extends the trick by faking his death and stealing the other half of the ransom gold.
- Lovable Rogue
- Never Live It Down: In-universe, for selling a Jules Remy trophy to the undercover LEP and later "laying low" in a Los Angeles penthouse whilst "collecting" Academy Awards. A prison warden was highly amused.
- Our Dwarves Are All the Same: Very, very averted, as they are the source of most of the series potty jokes.
- Plucky Comic Relief
- Bunny Ears Lawyer
- Crazy Prepared: While aware brain control waves have not been invented yet, he wears tinfoil hats in preparation for them nonetheless.
- Insufferable Genius: Irreplacable so he pushes Root's buttons all day; his favorite topics are his own work and the chief's smoking.
- Only One Name
- Our Centaurs Are Different
- Mission Control: He directs RECON missions from his computer room.
- The Smart Guy: Taking him out of his computer room is like taking the brain out of RECON.
- Ultimate Job Security: He deliberately angers his boss and decorates RECON's equipment however he wants but there are two reasons why he is never fired
- Voice with an Internet Connection: Perfectly summed up in this line "I'm right there with you, darling. Unless you trigger a land mine, in which case I'm in the Operation Room." Most of his 'field' time is this: talking through a headset to people in the field and supplying them with info.
- Chivalric Romance: Continually approaches the world as this.
- Chronic Hero Syndrome: Played for laughs.
- Crouching Moron, Hidden Badass: You know how Orion is Artemis's Cloudcuckoolander alter ego? Artemis can't shoot straight to save his life. Orion can.
- Honor Before Reason
- Hormone-Addled Teenager: Lampshaded
- Incorruptible Pure Pureness: Is thought to be a manifestation of this.
- Knight Errant: Sees himself as this.
- Knight in Shining Armor: Played for laughs.
- Let's Get Dangerous: In the book's own words, he "sped up, showing a nimbleness that anyone who knew the boy would not associate with him." And after that, he disarms Turnball, and uses his gun to accurately disable Holly.
- Split Personality: To Artemis.
- Wide-Eyed Idealist
Artemis Fowl Sr.
- Apron Matron: Seems to be becoming one of these in later books.
- Demonic Possession: Angeline's "illness" is actually this in book six, by Opal.
- Morality Chain: Has a hold on Artemis Sr's (and to a lesser extent Artemis Junior's) Morality Chain.
- Proper Lady: Hidden at first but once she recovers she's described as carrying herself with dignity and grace, as well as ordering the house hold, finances etc.
Trouble and Grub Kelp
- Annoying Younger Sibling: Grub.
- Awesome McCoolname: Trouble Kelp (see Meaningful Name), though with a bro named Grub, one has to wonder what it was before.
- Cowardly Sidekick: Grub to Trouble, especially in Book 2.
- Four-Star Badass: As of Book 5/6, Commander Trouble Kelp.
- Hero of Another Story: Trouble.
- Meaningful Name: Invoked Trope for Trouble, who chose to call himself that... and then there's Grub.
- Mistaken for Badass: Grub, after he manages to negotiate with Butler.
- Purple Eyes: Rare among the People, but Trouble has the royal purple version (Justified; he's a Fairy).
- The Complainer Is Always Wrong: Grub, especially as he complains too much. He files one over scuffed boots. Repeatedly.
- Too Dumb to Live: Grub.
- Animal Eyes: Her pupils narrow vertically like a cat's, which is uncommon but not unheard of among elves.
- Four-Star Badass
- Lady of War
- Killed Off for Real: In The Atlantis Complex.
- State Sec: A rare protagonistic version thereof, through Section 9.
- White-Haired Pretty Girl: She had been described as having "long silver hair".
- The Chessmaster
- Child Prodigy / Teen Genius: Preteen genius in book five.
- Chuck Cunningham Syndrome: Has been blatantly not mentioned after The Lost Colony.
- Word of God said that she ran away with a skier, and will appear in Book Eight.
- Distaff Counterpart: To Artemis.
- Insufferable Genius
- Replacement Flat Character: To Artemis in The Lost Colony. Her similarity to a younger Artemis serves to highlight his character development.
- Well-Intentioned Extremist: She wishes to kidnap Nº1 in order to aid human science.
- All of the Other Reindeer
- Deadpan Snarker: In his head, at least. He's rarely confrontational outside of his own private thoughts.
- Last of His Kind: Not quite, as it turns out.
- Our Demons Are Different: An in-universe example, seeing as he is a warlock.
- Spell My Name with an "S": His name is spelled with notation, but pronounced simply "Number One."
- You Are Number Six: Demons aren't given names until warping.
- Ax Crazy: most promiently when she attacks Cudgeon for treachery.
- Big Bad: In books four and six.
- Big Bad Duumvirate: With Briar Cudgeon, in book two. She ends up killing him for plotting to betray her.
- Brought Down to Normal: She implants a human pituitary gland into her brain in the fourth book. This ends up draining her magic reserves.
- Does Not Understand Sarcasm
- Enfante Terrible: When she's posing as a human in The Opal Deception.
- Evil Gloating
- Fur and Loathing: She has the seats of her private shuttle lined with animal fur, symbolizing of her rejection of fairies in favor of humans.
- Insufferable Genius: Just like Foaly she loves to show off how smarter she is than anyone she happens to be in the room with.
- It's All About Me
- Kick the Dog: Not only did she kill Root, she tricked Holly into speeding up his demise by shooting the bomb wrapped around his waist, claiming there was a weak spot.
- The Man Behind the Man: While the B'wa Kell has not always worked for her, she and Cudgeon helped orchestrate it's largest historical campaign against the LEP. She is also this to the Extinctionists in book six.
- The Man Behind the Monsters
- Manipulative Bastard
- Psychopathic Womanchild: In the graphic novel of the second book, Opal is depicted as wearing what looks like a thick sweater and "footy pajamas".
- Smug Snake: Though to be fair, it's very hard to be a Magnificent Bastard against the likes of Artemis.
- Tempting Fate: In the fourth book, she arrogantly proclaims that magic is of no use to her, and she will rely on science instead. When she needs to use her mesmer powers on a human at the end of the book, it backfires on her.
- Trademark Favorite Food: Chocolate. Especially truffles.
- Villainous Breakdown: Experiences this after Artemis tricks her into detonating the charges needed to complete her plan on her own shuttle, ensuring that her Evil Plan will fail and leaving enough evidence to show that she was behind everything.
- Ambition Is Evil: His 'favorite daydream' of a Council seat leads him to one questionable act after another, leading to the following tropes.
- Big Bad Duumvirate: With Opal Koboi in book two.
- Combat Pragmatist: On his first arrival at the Fowl Mannor, he wanted to blue rinsed the whole place immediately. Quick, unexpected, clean, and completely against the rules.
- Engineered Public Confession: Foaly sends a conversation of him admitting his plans to betray Opal to Artemis' mobile phone near the end of book two.
- Fallen Hero: One of the few on a First-Name Basis with Root because of their long friendship and the former's respect for his integrity and sense of duty. Then he lets ambition get the best of him.
- Lady and Knight: Has this Dynamic Opal Koboi The Artic Incident. Opal is the Ojou who does her techo-wizardy from a safe distance and Cudgeon is the Fallen Hero in the thick of things. "I shall be the hero of the resistance and you shall be my princess."
- The Man Behind the Man
- The Man Behind the Monsters: In this case, goblins. The B'wa Kell goblin triade were just a public nussiance until he organized and armed them.
- Smug Snake: Pride outstreching his ability is the reason for his fall.
- What the Hell, Hero?: Julius calls him out on using a troll in the Fowl siege.
The B'wa Kell
- Big Bad Duumvirate: They are lead by a triumvirate of goblins consisting of Scalene, Sputa and Phlebum.
- Kill It with Fire: Their favorite method of dealing with things.
- Playing with Fire: It comes out their nostrils.
- Our Goblins Are Wickeder
- Stupid Evil: Colfer will not let you forget that goblins are dumb.
- Too Dumb to Live: A general, their best and brightest, was caught using a forged credit card because he used his real name.
The Russian Mafia
- Karma Houdini, The Unfought, What Happened to the Mouse?: Britva, the leader of the group.
- The Mafiya
- Oddly Small Organization: Their total presence in the books is two henchmen and a mob boss.
- Though there were a hundred guards mentioned at some point and it's heavily implied that the two henchmen are doing one small task out of a big organization.
- Only One Name: Britva and Kamar.
- Bald of Evil
- Big Bad: Of book three.
- Corrupt Corporate Executive
- Does This Remind You of Anything?, No Celebrities Were Harmed: His relationship with Phonetix seems very reminscient of that between Microsoft and Apple.
- Evil Tower of Ominousness: The Spiro Needle, a very tall and thin Chicago office building that serves as his company's headquarters.
- Faux Affably Evil
- It's All About Me
- Just for Pun: The name of his company, Fission Chip.
- Man in White: Even all his furniture is white.
- Man of Wealth and Taste
- Screw the Rules, I Have Connections: To The Mafia, no less.
- Screw the Rules, I Have Money
- Smug Snake
- Villainous Breakdown: After realising he has been the victim of an elaborate Batman Gambit in book three.
- Blond Guys Are Evil: May be a subversion, as his hair is bleached blonde and he pulls a Heel Face Turn after a hoax ghostly visit from Butler.
- The Dragon: To Jon Spiro.
- Fangs Are Evil: One of his sets of false teeth is pointed, like a shark's.
- Heel Face Turn: A forced one at that.
- Ineffectual Sympathetic Villain: After losing his teeth.
- Tattooed Crook: Though not to the same extent as Loafers.
Pex and Chips
- Affably Evil
- Anti-Villain: Somewhat. His motivations in The Atlantis Complex are sympathetic, but it's made clear that he has been anything but an Anti-Villain throughout his career. Artemis states at the end that he finds it hard to really see Turnball as a villain.
- Better to Die Than Be Killed: In LEPrecon (in the Artemis Fowl Files), he swallows a lethal spider rather than let his brother take him back to prison. Julius manages to save him, though.
- Big Bad: Book seven.
- Cain and Abel: With his brother Julius.
- Corrupt Cop: He tried to flood a section of Haven in an attempt to wipe out a competitor who was muscling in on his illegal mining operation.
- Interspecies Romance
- Smug Snake
- They Call Me Mister Tibbs: Insists on being adressed as captain despite obviously no longer holding that rank in the LEP..
Mervall and Descant Brill
- Big Bad: Of book five.
- Demonic Possession: By Qwan's apprentice Qweffor, in an exceedingly rare protagonistic example.
- Evil Overlord
- Fake Ultimate Hero
- Humiliation Conga: He ends up being possessed by Qweffor, then is transferred into the body of a guinea pig.
- Large and In Charge
- Our Demons Are Different: Another in-universe example: He possesses magic abilities through the demise of the warlocks.
- Smug Snake
- Anime Hair: His spiky, multicolored hair, which the narration refers to as "manga hair".
- Ax Crazy
- The Dragon: To Minerva.
- Dragon with an Agenda: To kill all demons. He ends up betraying Minerva and holding Nº1 hostage because of it.
- Freudian Excuse: His brother made up stories about him fighting shapeshifting demons to cover up his nightly gang escapades. When murdered in a gang war, his brother was driven to kill the demons that supposedly took his brothers life.
- Knife Nut
- Multicolored Hair: It's dyed.
- Psycho for Hire: A shining example of this trope.