Heroic Willpower

""I should hope that the explanation is more interesting than some tedious issue of 'willpower'.""

- A Claymore villain after finding a hero withstanding a Grand Theft Me attempt

""This? This is just spirit. Anything is possible if you have the spirit for it.""

- Rakan, Mahou Sensei Negima

The worst has happened; The Hero has not only been infected by the Big Bad with the soul eating virus, but their determined resistance looks like it's about to finally peter out. Just as his friends, family, and significant other look on in growing horror as he becomes a monster and turns to eat them... he doesn't. Even though The Virus has their body and maybe even their mind, it doesn't have their heart or soul. Through sheer grit, or to protect a loved one, they manage to not only resist the lure of The Dark Side, but use Evil Is Cool against itself. They may become far stronger than a typical Virus-afflicted, especially if young vampires/werewolves/monsters of that kind are weaker than old ones like the Big Bad and under their control.

The hero who manages to reverse the Curse and uses their newfound powers to fight the Big Bad and their Dragon, and beat them at their own game is a Vampire Refugee. Usually, doing so manages to break whatever curse they're under thanks to No Ontological Inertia -- except when it doesn't. If so, or if they choose to stay infected to fight other monsters (as borderline Zombie Infectees) they end up Cursed with Awesome or become a Friendly Neighborhood Vampire pursuing the path of the Ascended Demon.

The power up gained with Heroic Willpower sometimes manifests by becoming a One-Winged Angel or with a move up the Bishonen Line, visually distinguishing them from rank and file infected. Incidentally, despite the name this isn't exclusive to heroes, the Determinator is a classic villain archetype after all.

The internal struggle is often verbally indicated by the character gaining the Voice of the Legion, paired with physical and verbal tics like biting off each word in a loud (or even shouting) voice in a This Is Sparta manner. When Played for Laughs the character will Lampshade this by saying something along the lines of "Must. Speak. Like. William. Shatner!"

A Sub-Trope of Heroic Spirit.

Compare Heroic Resolve, Determinator (when the character is almost nothing but resolve and willpower), Good Is Dumb, Deadly Upgrade, "I Know You're in There Somewhere" Fight, Intrinsic Vow.

Contrast with Fight Off the Kryptonite and Monsters Anonymous.

See also Sheep in Wolf's Clothing, Cursed with Awesome, The Dark Side, Evil Is Cool, No Ontological Inertia, The Virus, Viral Transformation, Doomed Protagonist.

Anime and Manga

 * Ensemble Darkhorse extraordinaire and Hollywood Cyborg Jeremiah Gottwald of Code Geass fame has one scene when an EMP-like weapon is used to disable his mechanical parts (which comprise a significant part of his body), thereby rendering him immobile and powerless before Lelouch. A few seconds pass, however, and Gottwald continues to advance toward Lelouch by sheer will, apparently grating some meat and metal parts together and causing himself great pain. He doesn't stop, however.
 * This is the ability of one of the main characters in Claymore. She can go "past the point of no return" in accessing youma powers, but still come back. She can also use this ability on others.
 * Deconstructed when
 * Jean has just as much willpower as Clare, if not more. This is evident in her introductory scene, where she manages to withstand being tortured for hours on end while her comrades succumb to the pain . Miria lampshades this when she says that Jean's   "must be due to an extraordinary strength of spirit" (though Clare's intervention certainly came in handy).
 * Mahou Sensei Negima has Jack Rakan rewrite reality on force of will alone. Once to break a trap dimension, and again after being deleted from existence. Breaking the trap dimension was eventually justified as taking advantage of some obscure magical theory no one has ever heard of. The other received no handwave.
 * In Tokyo Mew Mew,
 * Devilman is about a timid teenager with a pure heart who allows himself to be possessed by a powerful demon, so he can use that demon's power to fight and kill its comrades (thus, preventing an oncoming demonic invasion.) The boy's personality gets altered after merging with the demon, making him more aggressive.
 * One OVA involves him undergoing enough psychological stress he loses his Heroic Willpower and spends the finale battling inside of his own mind to regain control.
 * In Tengen Toppa Gurren Lagann.
 * The page for TTGL says this grows on trees in that world. Not Quite… It grows in everything with DNA. Though they call it Fighting Spirit/Spiral Power, and everything with a spiral to it has it or can be used to generate it. Yes, everything. Even That.
 * Viral is a beastman, which means he was specifically designed not to generate any Spiral Power. He manages to do it anyway.
 * Subverted in Dragonball Z by the reformed Vegeta, who gets possessed by an evil wizard, then though sheer willpower refuses to obey the wizard's commands to kill a god... and then attacks Goku anyway, revealing he chose to be possessed in order to get the power needed to crush his old rival.
 * The Vizard from Bleach. Either they can control the raw power of their darker desires given form or they turn into psychotic soul devouring monsters that must be put down for their own good.
 * Subverted in Chapter 352, when Ishida tells the newly hollowfied Ichigo that there was no need to carry on attacking Ulquiorra's corpse. The result is regrettable.
 * Hayate in Magical Girl Lyrical Nanoha A's, who reasserted her role as master and administrator of the Book of Darkness after it had taken full control of her body, leading to her ascension as the Queen of the Night Sky.
 * Souma of Kannazuki no Miko is pretty much the personification of this trope.
 * Throughout Hell Teacher Nube, one of the titular character's main fears is to have the Hand of the Oni overpower him and transform him into a full Oni, thus unleashing its horror on the world. He has always been able to contain it, with or without help, through sheer willpower. And yet, when confronting said Oni's brother, Zekki, Nube was forced to let the Hand take him over completely, which was Zekki's goal all along... and then proceeded to use the Power of Love for his students to control the transformation and beat Zekki into a bloody pulp.
 * In the 3rd Inuyasha movie, Swords of An Honorable Ruler, the titular half-demon
 * While more a display of Heroic Resolve than Willpower,  solves Inuyasha's problem later in the film by
 * Seiya from Saint Seiya can endure Incredibly Powerful attacks only with sheer willpower and some divine help.
 * Played straight for the most of the series with Luffy surviving a massive internal damage just with willpower or Portgas D Rouge delaying the Birth of Ace for 20 months to keep him save and accomplishing that with just willpower.
 * Subverted in the Impel Down arc of One Piece. Sure, Luffy has the heroic willpower to fight through anything. Which is why Magellan had to use a bajillion different poisons on him instead of just one, meaning no medical antidote would work. Double Subverted later, when Ivankov's treatment allows him to fight the poison directly with his will, and he wins (almost dying in the process).
 * In Yu-Gi-Oh!, for some people, Yugi stopping Yami from attacking Kaiba in the Duelist Kingdom arc may qualify.
 * Ryou Bakura fighting Yami Bakura from the inside during the Monster World storyarc in the manga certainly counts. Even after Yami Bakura takes control over his body, what's left of Ryou's consciousness manages to fight back and screw his dark counterpart up enough for Yami Yugi and friends to defeat him.
 * Jiraiya from Naruto, who literally

Comic Books

 * In 30 Days of Night, sheriff Eben Olemaun allows himself to be infected with vampire blood in order to become strong enough to defend his town.
 * In Batman Hush, Superman is controlled by Poison Ivy's special Kryptonite blend of mind-control lipstick, leading to a big fight with Batman, who frantically stacks the deck by playing Superman's innate boy-scout tendencies against him---those base-level urges are so innate to Superman that Poison Ivy couldn't make him ignore them. The control is finally broken by a supreme burst of Heroic Willpower caused by Catwoman shoving Lois Lane off of a building.
 * Midnighter gets a moment like this when he (along with Jack Hawksmoor, Jeroen, and most of the planet) is infected with an evil cult virus. Though the virus has made him obedient to the cult's will (so much so that they've got him flogging himself), he manages to hold out until Swift rescues him. Why? Well, the fact that they wanted him to publically break up with his husband Apollo and denounce his former lifestyle might have had something to do with it.
 * Leia Organa Solo provokes this in her mind-controlled brother in the first Dark Empire graphic novel, despite the Emperor's assurances that his personality had been completely annihilated.
 * During the Marvel Zombies/Army of Darkness crossover, Doctor Doom reveals that he's been infected with The Virus. The reason he doesn't attack the heroes is because he's so incredibly Badass that he's just holding it off because no goddamn virus is going to mouth off to Victor Von Muthafuckin' Doom.
 * Deadpool while temporarily infected by a T-O Virus (in a reality hopping storyline), complete with the obligatory Must speak like William Shatner?! line.
 * In the Spider-man comics there's the good symbiote Toxin (the host is a cop, and new father who decides to use this power to do good). Also the lesser known character Hybrid (though he/they are something of an inversion with the symbiote(s) being more placid and the human host more prone to Unstoppable Rage.)
 * The Green Lantern Corps is powered, quite literally, by heroic willpower.
 * Guy Gardner in particular has so much willpower that his ring can barely contain it, causing it to constantly spark with energy when it's not actively used. He's also one of the few beings who could control a Red Lantern Ring without being consumed with Unstoppable Rage.
 * Danny "Iron Fist" Rand can focus his chi so intensely that he can punch through steel and cure cancer. At the same time.
 * The Avengers' foe Grim Reaper thought it would be ironic to turn dead Avengers into zombies to use against the still-living ones... and then found out the hard way that Avengers fight evil even beyond death.
 * Not quite "Heroic" Willpower, but Doctor Doom gets one in the Emperor Doom arc, where he's used the Purple Man's powers to take over the world. The Purple Man tells Doom he couldn't have done any of this without his help, at which point Doom removes the mask that protects him from the Purple Man's powers and just stares him down while the Purple Man keeps giving him commands he doesn't obey. Now, Zebediah Killgrave... WHO deserves to rule?
 * Doctor Doom once went toe-to-toe with a Physical God called the Overmind, who professed to have the mental and physical strength of billions of aliens. He had already effortlessly mind-controlled Mr.Fantastic into trying to kill the rest of the FF, when Doom showed up. Doom simply IGNORED the mind-control, while simultaneously boasting, fighting, and being nearly killed... to save the man he hates more than anyone in the universe. And he did it all just to prove (to his arch-enemy's wife!) that he wasn't scared.
 * This is essentially one of Spider-Man's powers. In fact, on some battle forums, this mode is sometimes called "Aunt May Mode" or "Mary Jane Mode" because roughly once a year since his inceptation, Spidey has had one of these moments in which he utilized this trope, often when his loved ones were in trouble (or at leastr the moment was brought on when he thought of them). When this happens, he goes far beyond his normal limitations. Examples include:
 * Being trapped under a bridge when he needed to get to Aunt May, he actually lifted the entire bridge to free himself. The most impressive part of this scene is that this happend while he was a teenager, a time in which he was at his lowest power levels.
 * His infamous fight against Firelord.
 * Lifting an entire section of the New York Subway during a fight against the Lizard.
 * His first fight against The Juggernaut (although he was still not powerful enough to beat Juggy, he still managed to hold onto life/consciousness long enough to trap him).
 * His last fight with Morlun in which he actually came back from the dead and evolved on the spot to beat the villain who was threatening his wife.
 * This is like Batman's only True superpower. Superman said it himself in his World of Cardboard Speech He will continue to fight as long as he has breath in his body.
 * During one arc in the Giffen/DeMatteis run on Justice League of America, a street punk got his hands on Big Barda's Mega-Rod, her signature weapon. The Mega-Rod, forged on Apokalips, constantly sends out subliminal mind-control messages commanding that its wielder submit his/her will to Darkseid. By the end of the issue, the street punk was an emaciated slave living only to serve Darkseid. The fact that Barda is able to wield the Mega-Rod and can shrug off its mind-controlling properties speaks volumes of her levels of willpower.

Film

 * In Underworld, Michael is bitten by a werewolf and slowly starts turning into one. He later has the curse reversed for him when Selene, a vampire, gives him some of her blood, allowing him to become a hybrid Werewolf/Vampire with enough raw strength and speed to stand toe to toe with the vampire elder Victor.
 * In The Lost Boys, the older brother, Mike, is given blood that's slowly making him a vampire. After a climactic battle where he, his brother and friends defend their home from the vampire gang that was turning him, he manages to beat the strongest vampire in the gang. When he doesn't turn human again
 * Doom (the film) revolves around a chromosome which, when injected to people with an "evil" gene, turns them into murderous monsters. When Reaper is injected with it, he becomes superhuman, since he doesn't have the evil gene.
 * And also, one of the marines realizes that he is infected and brains himself to death before he can turn.
 * Sufficient fridge logic can lead you to the conclusion "If the main character is good because he regrets his alluded to arguably evil acts, and thus turns superhuman... shouldn't the man who realized that he could kill everyone by turning and sacrificed himself to save his friends be just as good?"
 * ...no. Remember, it was the "evil gene" that caused them to turn into monsters instead of superhumans. Grim's sister thinks that its the same gene that makes people evil, but she could be wrong. All we know for certain is that Goat had this gene (as did most of the other mercenaries), and Grim didn't.
 * This is also implied to be how only some people escaped demonic possession in Doom III.
 * Evil Dead II had our hero Ashley Williams corrupted and turned into a Deadite. He couldn't actually fight it off when it mattered, beating the hell out of the only other survivor and approaching her unconscious body to finish her off. Then he came across the bit of jewelry that he'd given his girlfriend earlier in the film, lets out a howl of pain, and successfully fights off possession.
 * Serenity: despite River Tam's brain is explicitly stated to be surgically altered to remove her ability to control her own behaviour, she nevertheless becomes less insane and more stable in the end of the film, with no explanation other than Heroic Willpower and the Power of Friendship.
 * Getting the secret of Miranda off her chest seems to have helped too.
 * Skyline: while everyone else who  seems to lose all personality and will, the male lead
 * Skyline: while everyone else who  seems to lose all personality and will, the male lead

Literature

 * In Terry Pratchett's Carpe Jugulum, Granny Weatherwax pulls this one off with vampiric infection. An interesting twist is that she uses the blood connection to make the vampires weaker, rendering them unable to drink blood or harm humans and giving them an unnatural addiction to tea and cookies. One ends up wondering who infected whom. It's not entirely made clear if getting bitten was a masterful Plan, or if she was just more stubborn that even she realized.
 * She also actually says something along the lines of “I haven't been vampired, you've been Weatherwaxed.” to them, suggesting that she at least understood what had happened.
 * It was a gamble, given that she told Mightily Oats to get ready to kill her, but she definitely did it on purpose, betting that once she got into the vampires defences she would be stronger than them.
 * Alternatively,it was a Miracle from Om.
 * Then there's Sam Vimes in Thud!, as discussed above.
 * That! Is!! Not!! My!! Cow!!! Dwarves forever will fear those words.
 * Vimes has experience with is freakin' made of this trope. It happened to him in Men at Arms, and got Lampshaded too: "The pounding spirit of the gonne flowing up Vimes' arms met the armies of sheer stoneheaded Vimesness surging the other way."
 * To be fair, a desperate alcoholic who keeps a bottle of whiskey in his desk drawer as a permanent test is going to have some serious willpower to bring to bear. The man works out.
 * And, at the end of Jingo, he tells off one of the Ankh-Morporkian aristocrats while holding a burning coal in his hand.
 * In Second Apocalypse Kellhus displays Heroic Willpower in shrugging off mind control.
 * In The Tommyknockers, by Stephen King, Bobbi Anderson's sister Anne is a lifelong bully and control freak who makes everybody around her frightened and/or miserable. She has "heroic willpower" in exactly the sense Hitler claimed to have "fanatical will power." But when she is turned into a living battery for the Havenites, her ultradominant personality at least enables her to rebel and subvert the machinery.
 * Occurs in Good Omens: Adam is a 11-year-old boy who also happens to be the Antichrist destined to end the world. As the Apocalypse draws closer, he gradually becomes less like his playful kid self and more like a ruthless Creepy Child Reality Warper. When his friends make him realize that he's Not Himself, he visibly struggles against another presence within himself (presumably some hellish influence) and manages to regain control of himself to enact a Screw Destiny mission.
 * Let's just say that Terry Pratchett is REALLY good at writing this, and end there.
 * Edward Cullen in Twilight is a poster boy for this. Even though Bella is his singer, the one human whose blood is absolutely irresistible to him, he painfully prevents himself from killing her, since he "doesn't want to be a monster" and because he eventually falls in love with her. Of course, his blood lust is a metaphor for real lust, which he's also experiencing, and which he also has to demonstrate incredible willpower to resist, since he's sure sex would kill Bella.
 * All this in spite that Bella is more than willing to take a chance at the risk and its not shy of trying every waking moment.
 * Not only that. He manages to control his thirst so good that he can kiss her, hold her and eventually have sex with her without drinking her blood or killing her.
 * Bella herself also demonstrates this trope when she becomes a vampire, even being able to resist going after human blood when she catches their scent during a hunt and generally being able to control her newfound vampire senses and urges immediately instead of being blood-crazed for the first year as she was warned she would be.
 * Dragonlance has some not-quite-but-close examples. Raistlin who whilst opening the portal to the Abyss realizes he has failed just like his predecessor before him and was about to die and cause great destruction all around him as the portal was closing, through sheer force of will alone held the portal open long enough to enter it. The difference here is that Raistlin was not a hero, so it was more like Villainous Willpower, if there is such a thing.
 * His nephews Palin and Steel managed through will to brave their way through the Shoikan Grove—a passage that no mortal had ever passed before without an invitation from the master of the Tower.
 * Mr. and Mrs. Chapman in Animorphs #2, for a little bit.
 * In Invincible, Admiral Wedge Antilles can apparently prevent Jacen Solo from reading his mind through sheer determination.
 * In Parrish Plessis, Parrish's heroic willpower makes her the only one able to resist the influence of The Corruption after being infected.
 * Necroscope's  contains his vampirism until he feels he can do so no more and then leaves Earth. Unfortunately he continues to try to do so when among his own kind, which ends very badly for him and everyone he cares about.
 * Harry Potter regularly fights off various threats that attempt to weaken or control his mind, such as the despair-inducing power of the dementors, although he is overcome by these the first few times. He also seems to be nearly immune to the Imperius Curse, a strength no other character shows, and in one case fought off bodily possession by Voldemort himself. His resistance is explained as a combination of this trope and The Power of Love.

Live Action TV

 * Zhaan in Farscape had a variation of this happen to her. Tahleen, an evil member of her race, telepathically tore from her mind the knowledge she used to overcome a wasting insanity she suffered by telepathically murdering her former lover for being a traitor. The result was that she became borderline-sociopathic with red eyes. She managed to Snap Back thanks to sharing minds with Crichton, showing her that the kindness she was capable of was inherent and couldn't just be ripped out. As a result, she also became more spiritually powerful, and destroyed the evil priestesses' chance to grow stronger.
 * In the short-lived show Odyssey 5, Chuck Taggart is infected with Nanomachines that are slowly turning him into a "Synthetic", or cyborg servant to an Evil AI. As the process is about to complete and he links with the AI, he resists becoming it's servant and instead steals the knowledge needed to reprogram the nanites to turn him human again.
 * In the Doctor Who episode "Doomsday", Torchwood leader Yvonne, who helped cause an invasion of Cybermen by interfering with the Doctor, is captured by the Cybermen and undergoes Cyber-conversion. She manages to maintain her free will through her love of “Queen and Country” (or the fact that she was already robotic enough that the Cyberman procedure had no effect,) and holds off several of the Cybermen, at the cost of what was left of her own life, while the Doctor saves the day.
 * in "The Pandorica Opens". has enough Heroic Willpower to hold onto his identity and memories,.
 * In "The Five Doctors", the Doctors combine their willpower to free themselves from being People Puppets.
 * In one episode of Knight Rider, Michael gets poisoned and becomes steadily weaker as he searches for the antidote. Towards the end, as KITT monitors Michael's vitals, he actually says “You're now operating on sheer willpower!”
 * Inverted in Stargate Atlantis, where the Wraith Michael manages to overcome the effects of a virus that turns Wraiths into submissive humans (on two separate occasions) through a sort of “Villainous Willpower.”
 * Inverted in Heroes Sylar resists Doyle's People Puppets trick through “Villainous Willpower.”
 * Of course, Sylar is a frighteningly powerful telekinetic. Even if his motor functions weren't obeying him, he could have moved his body with that power.
 * James T. Kirk is able to resist all manner of odds and temptations through sheer willpower and pure awesomeness in just about every other episode.
 * In the episode "Operation: Annihilate!", Spock is infected with a Puppeteer Parasite that causes violent madness through excruciating pain. Spock overcomes it through sheer force of will and is able to operate almost normally, with flashes of discomfort, until cured.
 * Henry Foss in Sanctuary learns to control his werewolf side and keep it from taking over in "Edward" (and uses his newfound skills to solve the Mystery of the Week). Later, in "Revelations" he resists the Cabal's attempts to permanently turn him into a werewolf and later turns just enough to escape from a cell without going all the way.
 * This is the only reason Supernatural's world still exists.
 * Shown by John in "Devil's Trap" when he is able to resist and trap the possessing Azazel for a moment. Later, he
 * For thirty years, Dean resisted Alastair's offer to escape torture in Hell by torturing other souls. In "The Magnificent Seven", he resists Lust's charms.
 * Displayed by a demon-possessed in "Sympathy for the Devil" when he breaks the demon's hold just before it can kill Dean, and instead, stabs himself with Ruby's "kill-all" knife.
 * Sam in season five finale Swan Song just so he could . In the season six finale, he drags himself to assist Dean and Bobby in the battle

Music

 * The Curse by Disturbed.

Tabletop Games

 * Inverted in Warhammer Fantasy Battle and Warhammer 40000, where Villainous Willpower determines which of the two possible One-Winged Angel routes a follower of Chaos goes down - becoming a mindless Chaos Spawn or a Daemon Prince who retains sentience and control over his powers.
 * But Heroic Willpower is usually an attribute which sets apart the BadAssNormals from the Refuge in Audacity named Badass characters, and commonly just the elite forces from the less-so.
 * Dungeons and Dragons 3.5 had Iron Heart Surge, which, due to poor clarification, can end anything from raving insanity to being pregnant, but due to manuver rules, can't break out of being magically held in place or Mind Control that Heroic Willpower typically ends (You need to be able to move to use a maneuver).
 * Bonus points for vampires. I'm in sunlight. I end the sun.
 * This is represented in White Wolf's Storyteller/Storytelling systems by the appropriately-named Willpower score, which aids in throwing off mental influence and enhancing various dice rolls.
 * In Exalted, every character also has a handful of virtues. Compassion, Conviction, Temperance and Valor are ranked 1-5 based on how your character views them and acts on them. If you're trying to do something that fits a virtue, you can use Willpower to boost to your roll. So if you're some sod beating his wife or a kid, and a Compassion 5 Exalt sees you doing it odds are you're about ready to get the beatdown of a century. (The flip side to this is that characters with high virtues have bigger issues with Limit Breaks.)
 * Hunters in Hunter: The Vigil are able to do all kinds of impressive things with Willpower points. It's not quite on par with its use in Exalted, but that's because Hunters are basically limited to Badass Normal with a few extra tricks.
 * Willpower functions in a similar way in the other World of Darkness gamelines. For example, not only is the difficulty of a Vampire's Dominate Discipline determined by the victim's Willpower (meaning that a character with maximum Willpower requires all but a perfect roll to control sucessfully), but certain merits, such as Code of Honor, or certain abilities, such as a Mage's Mind Sphere, can help increase the difficulty further. Willpower also determines whether or not a character falls victims to phobias.

Video Games
"Batman: ...Oracle, how long have I got? Oracle: Oh, thank God. I'm not going to sugar coat it. At this rate... I'd say minutes. What do you want me to do? If you don't- Batman: I'll make it."
 * Tales of Symphonia's Applied Phlebotinum has the nasty side affect of turning people into monsters if they're not correctly protected. Marble sacrifices herself by exploding (!) into the resident bad guy. However, Lloyd and Genis had just beat the shit out of her after she attacked them, so maybe it doesn't count.
 * Happens to in Tales of Hearts. The possessor ends up stabbing his host body and leaving.
 * Ghost Trick: —which is what winds up killing
 * The entire story of Neverwinter Nights 2: Mask of the Betrayer revolves around this, especially for good characters
 * In Grandia II, Ryudo gets a piece of the devil stuck in him. Through an extended dream sequence, he fights off the devil and comes out of the coma. Later when he tries to become a god (being the only person qualified in the room with a piece of the devil in him) he becomes a monster; later, through the power of song and friendship, he pulls through and becomes human again.
 * The second Mega Man Star Force game briefly has the hero taken over by an ancient Upgrade Artifact, but this doesn't last long once a friend of his tells him to Get a Hold of Yourself, Man!. The third game has a different character use The Corruption within them in order to pull off a Heroic Sacrifice.
 * This is, in fact, simply a continuation of a recurring theme in the prequel series. Most notably, in Battle Networks 5 and 6. In 5, he is poisones by Dark Chips and can learn to use them more effectively. In 6, he gets posessed by a Cybeast (based on your version), and uses the Cybeast power to boost his own. It's reasonable to assume that the Cybeast instance is the inspiration for the OOPart posessing Geo in Star Force 2, by seeing all the similarities between the two.
 * Sergeant Nathan Hale in Resistance: Fall Of Man is an example of this trope, as even when he is infected with the Chimera Virus, he just turns into a lean mean bug-busting machine.
 * Unfortunately,
 * In World of Warcraft, undead player characters have a racial ability called Will of the Forsaken, which allows the player to escape from fear or mind-control effects.
 * In fact, the Forsaken are all this trope. They've all got The Virus, but they keep themselves free of the Lich King's normal dominance over the Scourge. The Lich King was weakened at the time, of course, but its still impressive.
 * The final raid of Cataclysm, we have the boss Ultraxion. His first move is to drag everyone into a shadow dimension, which players must use the temporary ability 'Heroic Will' to break out of at specific times to avoid death.
 * Your own character ostensibly manages this in the Baldur's Gate series, particularly if you play as a Good aligned character. You are, with wanton killing of innocents supposedly in your very blood, but through a series of dreams you fight off that influence and “remake yourself in your own image.”
 * Ditto a Light Side character in Knights of the Old Republic, since you are, Becoming the Mask enough to successfully reject that requires an enormous amount of fortitude. Of course, much of this accomplishment is diminished by the sequel and various other ancillary materials giving   an Omniscient Morality License.
 * Revealed to be very important to a certain werehog in Sonic Unleashed. Sonic apparently has so much of this trope that he can practically guzzle down the power of an Eldritch Abomination yet be almost completely unaffected mentally. What's even more impressive is that he wasn't even aware that he was doing it.
 * Makes you wonder how he would act if he had learned
 * Also, in Shadow the Hedgehog, when Shadow proves himself immune to Black Doom's control. Also slightly earlier when he recovered from his Heroic BSOD.
 * Also used in the Sonic Storybook Series entry Sonic and the Black Knight as this was one reason how
 * Subverted in Sonic Rivals 2; In the last mission of the stories of Sonic/Tails and Knuckles/Rouge, Ifrit, the monster of the game, will possess the partner to attack you throughout the boss. It has the same full effectiveness on all of them - even Sonic, the main hero. Of course, it's only very temporary.
 * In Mass Effect 1, is the only member of Zhu's Hope who is able to  In fact,
 * Villain examples: The first game's both baddies, Benezia and Saren are also subjected to this. Benezia is able to resist Sovereign's mind control for a short time during her confrontation to inform, that they don't do this from their free will. Saren can be talked to Heel Realization in the beginning of the final fight where he will become lucid for a moment
 * Subverted hilariously in Mass Effect 2, when Morinth suggests The Hero may have the willpower to resist her mind-frying Death by Sex. The Hero does not.
 * The protagonist of Traffic Department 2192 demonstrates a partial example, albeit not in the way she intends.
 * This is a gameplay mechanic in Freedom Force. Every playable character starts each mission with one “hero medal,” which can be used at will for full healing, full restoration of energy, or removal of one negative status effect. Minuteman, the resident Captain America (comics) Expy, can be upgraded to start with two or three medals.
 * Isaac Clarke. Not only does he walk through dimly lit corridors full of freakish space zombies,
 * Bill of the Left 4 Dead mythos, in the starting wave of the infection, is being put under for surgery on his knee which had been damaged during his tour of duty in Vietnam. The nurse prepping him for surgery turns in the middle of it and attacks him. He forces himself to stay conscious through modern anesthetics, fends off the now turned nurse, and runs down the hall on said knee that required surgery to find himself a weapon. For reference, the reason said knee needed surgery is that it still hadn't and probably never would fully recover from being torn up by shrapnel during his tour in 'Nam. And Bill would go on to fight Tanks on it anyway.
 * Batman: Arkham City both Batman and the Joker are infected with a poison (Joker poisoned a few people in gotham too, just for good measure) and are both dying. Even as it ravages his body, Batman fights on, doing what he has to to get the cure.


 * City of Heroes has this as an actual defensive powerset for Melee classes, mostly to reflect a more "natural" superhero who doesn't rely on fire, ice, rocks, energy or anything weird like that for protection. Most other sets hand-wave your ability to avoid damage as your armor deflecting or absorbing the damage. Willpower has you fighting on DESPITE taking grenades, energy blasts, super-powered fists and all manner of weaponry to the face. Incidentally, it is one of the best performing powersets in the game.
 * In Kingdom Hearts, after Sora stabs himself with the dark Keyblade and turns into a Heartless to save Kairi, all hope seems lost for his companions, as Ansem is likely going to kick their asses and kill them anyway... until Riku's spirit leaps out of Ansem's body, holding him off for just long enough that Kairi and the others can escape to Traverse Town.

Webcomics

 * Girl Genius: Agatha has fought off Lucrezia without musical aid once in this strip: http://www.girlgeniusonline.com/comic.php?date=20100310
 * Nedroid: Reginald has incredible willpower.

Real Life

 * Motley Crue Guitarist Mick Mars has struggled with a condition called ankylosing spondylitis for most of his life. This disease is a form of arthritis that causes the ligaments in the lower spine to fuse with the bone. His condition got so bad that when the band split up, he reportedly gave up guitar playing. However, when the band reformed in December 2004 (coincidentally this was after he had hip replacement surgery) he decided to take up playing again, saying that "he'll be damned if it (the disease) was gonna have his soul too". He is still one of the greatest guitar players out there.