* At least one major villain or rival (but usually more) per season in ''Anime/YuGiOh'' and ''Anime/YuGiOhGX''; balanced by the fact that the [[FaceHeelTurn opposite]] is none too rare, either. This is often combined with DefeatMeansFriendship, but not always. (In fact, villains who are truly incapable of redemption are kind of rare in this series.)
** Aside from Kaiba, who never became much more than a JerkWithAHeartOfGold to anyone aside from [[MoralityPet his brother]], the earliest was when Pegasus from the original series allied with the protagonists following his defeat at the hands of Yugi, [[spoiler:and the theft of his Millennium Eye by the evil spirit of the Millennium Ring, a.k.a. Yami Bakura]]. But that Heel Face Turn only happens in the anime; in the manga, [[spoiler:Yami Bakura kills Pegasus when he takes his eye.]]
** Ryuji Otogi/Duke Devlin was an odd example, because to many fans, his HeelFaceTurn made very little sense; one minute he was acting like the typical heartless villain, the next minute, he was apologizing for everything. Truth be told, the manga version of the story - where Otogi was used as an UnwittingPawn by his AxeCrazy father, who was the true villain - made much more sense, but was [[DarkerAndEdgier far darker than the anime version]] and the adaptation was probably at a loss to explain the transition because it had to leave him out.
** Another example is Tetsu Ushio from ''Anime/YuGiOh5Ds''. He started out as a DirtyCop and a pawn of [[BigBad Rex Godwin]], who, like most citizens of Neo Domino, [[PoliticallyIncorrectVillain had nothing but contempt for the residents of Satellite]]. It was never a case of DefeatMeansFriendship (''two'' defeats at Yusei's hands only made their feud worse) but he started mellowing around the Fortune Cup (realizing that Godwin was treating him like garbage played a big part) and he was officially Yusei's ally at the end of the first season, mostly after starting to sympathize with the Satellite residents.
* Char Aznable in ''[[Anime/MobileSuitZetaGundam Zeta Gundam]]''. This [[CharsCounterattack reverses]] into a FaceHeelTurn.
** Emma Sheen pulls one off pretty early, as well.
* In the ''Anime/SailorMoon'' anime, the Ayakashi Sisters, Amazoness Quartet, and Professor Tomoe have Heel Face Turns and [[RedemptionEarnsLife survive.]] Nephrite, Saphir, and Prince Demand have them and [[RedemptionEqualsDeath do not.]] The Amazon Trio have an odd in-between case, "dying" on Earth but getting to go live in Elysion (the world of dreams) rather than the afterlife.
* There are several Heel and Face turns in ''GundamSeed''. Loyalties and what one fights for are driving themes for the entire series, in fact.
* Amiboshi and Yui from ''FushigiYuugi''.
* Loads of villains in ''Manga/FairyTail'' go through this. You can count on at least one Heel Face Turn per every major arc, and sometimes it happens to most of the current enemy team. Sometimes this is due to ThePowerOfFriendship. Sometimes due to the villains being not that villainous to begin with, simply misguided or deceived.
** And then there was the FakeDefector. We were all pulling for him, too!
* ''Franchise/{{Digimon}}'' has one every year, often used to switch plot arcs partway: [[Anime/DigimonAdventure Season 1]] has Gatomon (Tailmon), [[Anime/DigimonAdventure02 Season 2]] has Ken, Season 3 has Beelzemon (Beelzebumon), Season 4 has Koichi, and Season 5 has Keenan (Ikuto).
** [[Anime/DigimonTamers Season 3]] also has [[ScaryShinyGlasses Yamaki]] (the Hypnos guy), who functions as the [[StarterVillain initial main villain of the series]], goes from being defined by his hatred of the "Wild Ones" to a staunch ally and sympathetic behind-the-action helper. There is also Antylamon, one of the Devas working for Zhuqiaomon, and Zhuqiaomon himself (the second main antagonist of the series).
** There's also the manga: For instance, V-Tamer has [[spoiler: Alias 3 and Neo Saiba, all four, do Heel Face Turns.]]
** Manga/DigimonNext has Shou Kahara and Murmuxmon.
** [[Anime/DigimonAdventure Season 1]] also had [[TheOgre Ogremon]].
** [[Anime/DigimonAdventure02 Season 2]] also has [[spoiler:[=BlackWarGreymon=] and Oikawa...though, to be fair, the latter was only evil due to being HijackedByGanon]].
** [[Anime/DigimonFrontier Season 4]] also had Cherubimon and all [[QuirkyMinibossSquad the corrupted Legendary warriors]] make Heel Face Turns ''after their deaths'', with their spirits coming back to assist the heroes in the final battle.
** Jillas in the third.
** [[Anime/DigimonSavers Season 5]] also has [[spoiler: Nanami and Ivan at the end, as well as the Royal Knights, Gotsumon, and Merukimon]]
** [[spoiler:Nene, Kiriha, and Yuu]] from [[Anime/DigimonXrosWars Season 6]]. The rival hunters from its sequel also eventually pull one off.
* Used twice in ''Manga/{{Naruto}}'''s "Land of Waves" arc. Traitorous ninja Zabuza and his androgynous young henchman Haku, whom he habitually mistreats, have been hired by gangster Gato to stop the Land of Waves villagers from building a bridge that will be economically vital to their island. Naruto and his friends are sent to make sure the bridge gets built. When Haku seems to kill Sasuke, Naruto swears {{revenge}} until he learns of Haku's tragic past, which calms him down (besides, Haku made sure that Sasuke is NotQuiteDead). Then, Haku does a HeroicSacrifice to save Zabuza, and the rogue ninja's guilt over his abuse of his dead partner causes him to FreakOut; Zabuza switches sides, killing Gato before getting killed himself.
** It's better than that! Haku dies nobly and Zabuza is unfeeling about it, and Naruto ''in the middle of a freaking ninja battle'', freaks out at him about how much Haku cared and how wrong this is, until the Demon of the Mist turns around slowly...and there are tears running down his cheeks.
--->'''Zabuza:''' You talk too much...
** Twice in the "Land of Waves" arc, but far more frequently later. Hyuuga Neji, who is half-inspired by Naruto's (an obvious AllLovingHero) victory into rethinking his fatalistic JerkAss-itude and goes on to claim that Naruto saved him. Or Gaara, who is so stunned by Naruto's empathy and suckerpunch, that he stops living to kill people and begins living to help people, enough to become the Kazekage!
*** Gai and Lee were important to this process, too.
** After the TimeSkip, [[spoiler:Naruto manages to get his most powerful EvilCounterpart, the PhysicalGod Pain/Nagato, to pull off a RedemptionEqualsDeath by bringing back to life the people who died in his invasion of Konoha]].
** A recent chapter had a SWORD pull one.
*** The sword didn't really go from bad to good, it was just helping the good guy for its own benefit. Plus, it seems to be with the bad guy again anyway. [[spoiler:But now that its original owner has been KilledOffForReal]]...
** 570 has [[spoiler:the Kyuubi/Kurama]], who was thought of to be the very embodiment of hatred, finally give in to [[AllLovingHero Naruto]]'s kindness. The next chapter [[CrowningMomentOfAwesome shows]] [[ThePowerOfFriendship the]] [[SuperMode results]].
** In Chapter 627, [[spoiler:The Greatest example of this trope in Naruto has occurred. That's right people, Uchiha Sasuke has decided to ally with the good guys.]] but it turns out that while Sasuke has decided to do this and even to [[spoiler:become Hokage]] The pep talk he got from Hashirama only turned him into a WellintentionedExtremist.He wants to kill anyone who he considers an obstacle to his Revolution. This includes [[spoiler:Naruto and all of the Kage.]].
*** Not only that but [[spoiler:OROCHIMARU, the big bad of a huge number of early plot arcs]] has decided to join the fray as a good guy. Though his motives are ambiguous enough that it could just be an EnemyMine.
** [[spoiler: Obito appears to be invoking this trope in the new 665 chapter. Though he was [[UsedToBeASweetKid originally good]] to begin with.]]
** [And in chapter 667, [[spoiler: Kabuto has joined the fray, helping to revive Sasuke. The reason? His time in Itachi's Izanami spell helped Kabuto realize his true nature, that he's really a good person deep down, and that he has a home to return to.]]
** At this point, [[spoiler:Madara]] is the only major villain that ''hasn't'' seen the light. It remains to be seen whether that will last...
* [[spoiler:Touga]] in the manga adaptation of ''Anime/RevolutionaryGirlUtena''.
* ''Manga/DragonBall'' and ''Anime/DragonBallZ'' practically built its cast this way. By the end of the series, most of the heroes are former villains; it's easier to list the characters who didn't try to kill or at least beat Goku up when they met him than otherwise. For that matter, Goku himself had a {{backstory}} heel-face turn, when his inherent Saiyan nature was subverted by a blow to the head. It took Vegeta the longest to fully turn, and he actually turned all the way back to [[FaceHeelTurn heel]] right before it happened.
** To highlight it better, of the core cast of Z fighters from throughout DBZ, Goku himself had been sent to Earth initially to depopulate it as a mindless ape, Yamcha was a bandit who tried to rob Goku when they met, Krillin was TheRival for Master Roshi's attention, Tien and Chaozu were students of the Crane Hermit, a wicked rival to Master Roshi, Piccolo was the son/reincarnation of EvilOverlord King Piccolo out to avenge his father/former self's defeat by Goku, Vegeta came to Earth solely to steal the Dragon Balls and kill anyone who got in his way, Androids 17 and 18 were rebellious punks who caused a BadFuture in Future Trunks' timeline, and Majin Buu was a childlike pink blob monster who didn't even realize that causing death and destruction was bad until Mr. Satan set him straight.
* In ''Anime/SaintSeiya'', [[spoiler: both Saga and Kanon have a Heel-Face turn. Saga, right before [[RedemptionEqualsDeath he kills himself]], and Kanon after realizing that even after all he had done, (corrupted his brother and made him try to kill Athena, besides trying to flood the world by tricking Poseidon), Athena still saved him multiple times and cared about him. That made him turn into a Face and fight for Athena; Milo at first doesn't trust him, but after he attacks Kanon and the latter doesn't retaliate even once, Milo realizes Kanon has truly become good.]]
* Ayaka Steiger in ''Anime/KurauPhantomMemory'' turns from the main bad chasing the protagonists to their biggest ally after discovering that her boss ordered the murder of her father.
* Nearly every villain in ''Kero Kero Chime''. In fact, in a bizarre and random musical sequence in the last episode, Demon King Bao, the SealedEvilInACan who turns out to be the true reason most of the Hebizoku and Kaeruzoku disappeared 10 years ago, as he took them with him upon being banished, reveals that he's completely reformed, and he and his former enemies like being Trapped In Another World, as it's allowed them to become such great friends.
* This happens in ''{{Kinnikuman}}''. A LOT. To the point where at least 3 {{Big Bad}}s and 2 Dragons have done. Ironically, two have gone to do {{Face Heel Turn}}s in the sequel series, ''KinnikumanNisei'', which features even MORE {{Heel Face Turn}}s.
** Considering that the series is based on pro wrestling this is only appropriate.
* ''Franchise/MagicalGirlLyricalNanoha'' [[DefeatMeansFriendship Befriends many of her enemies]]. To put it in perspective, the only returning good member of the regular cast in the third Season who didn't start out as a villain in one way or another is Nanoha herself.
** In the [[Anime/MagicalGirlLyricalNanoha original series]] it was Fate and Arf.
** In ''[[Anime/MagicalGirlLyricalNanohaAs A's]]'', Hayate and her knights.
** In ''[[Anime/MagicalGirlLyricalNanohaStrikerS StrikerS]]'', seven of the twelve Numbers and [[spoiler: Agito]].
* ''Anime/PrincessTutu'' has several characters who follow this trope. In the first season, it's [[spoiler:Fakir (sort of) and Edel]]. And towards the end of the series [[spoiler:Rue discovers that the Raven is not her true father, and risks her life to save Mytho]].
* ''Skyers 5'' used this trope to good effect.
* Rokudo Mukuro in ''Manga/KatekyoHitmanReborn'', but it only half counts because his Heel Face Turn coincides with his possession of Chrome Dokuro's body
* In ''Manga/DGrayMan'', General Cross can turn [[TheHeartless Akuma]] good. This isn't perfect; they have trouble rejecting explicit orders from the [[BigBad Millennium Earl]]. To compensate, Cross has these Akuma rigged to self-destruct instead of killing people.
** And then there's poor what's-his-name, turned into a death-headed servant of darkness. And Suman, who Allen gave so much, pointlessly, to drag back. And poor, [[OneWingedAngel poor]], [[BreakTheCutie broken]] Alma Karma.
* Pixy Misa in ''MagicalProjectS''. Considering [[DarkMagicalGirl her concept]], it was inevitable.
* The BigBad of ''{{Mahoromatic}}'''s first season becomes a reluctant hanger-on in the second.
** Ryuga wasn't really a Big Bad, but a rival to Mahoro. Difference is motivation. A better example of this is Minawa from the second season, who is TheMole until her turn [[spoiler:She realizes she has a heart after she lured Mahoro to Management's fortress, using Suguru as bait. A heart (ability to have emotions) was the prize the real {{Big Bad}}s dangled in front of her. She didn't realize she'd get one through ThePowerOfLove, simply by staying with Mahoro and Suguru. She is then instrumental in freeing Mahoro from the trap she herself lured Mahoro into. This also catalyzes the end of the series, as it cuts Mahoro's life short, well short of the original deadline.]]
* ''Anime/CodeGeass'', done by [[spoiler:[[CrowningMomentOfAwesome Orange boy, Jeremiah Gottwald]].]]
** Actually it happens to everyone. [[spoiler:Schneizel leaves Britannia and makes up his own rebel side after failing to murder the Emperor, the Black Knights join him, Gino joins the Black Knights, and Suzaku betrays Charles, though joining Lelouch could be considered a Heel Face Turn anyways. Because the definition of what each side is changes so drastically, the rest of the Rounds are harder to place: Betraying Britannia or staying loyal to their former boss?]] This being ''Geass'' this could be a FaceHeelTurn depending on how if you believe [[spoiler:the new Britannian emperor]] is an {{antihero}} or an {{antivillain}}. Really after [[spoiler:the betrayal]] there are no good side or bad side, just a bad side, and an even worse side.
* ''Manga/InuYasha'': Sesshoumaru went from a human-hating jerk who wanted to kill his own brother to a fiercely protective sibling and mentor after taking in an orphaned human girl. [[spoiler: After he and Inuyasha end up protecting each others groups a few times, they finally throw in their lot together and fight the BigBad as a united force.]]
* Bad Bird in ''SamuraiPizzaCats'' who joins up with the good guys after a speech from Speedy saying that if Bad Bird helps Cheese win, everyone in Little Tokyo dies, including Bad Bird's girlfriend.
* Rocket from ''GingaDensetsuWeed'' starts off as one of Hougen's spies but after about 3 episodes, he becomes one of the nicest dogs in Weed's pack.
* All the villains in ''ShugoChara''. Yuu Nikaidou was a case of DefeatMeansFriendship after Amu foiled his plan to create an Embryo, which is the MacGuffin of the series. Kairi Sanjo was convinced by Amu to do his Heel Face Turn in a ThePowerOfFriendship[=/=]ThePowerOfLove moment. Utau Hoshina realized she didn't want to sing to ruin people's dreams, but that she wanted to sing to make people happy. Yukari Sanjo was more or less another case of DefeatMeansFriendship. And the latest villain, Lulu, seems to be succumbing to ThePowerOfFriendship.
* Adette Kistler from ''OvermanKingGainer'' joins the Exodus once she is forced to stay in the city units for a while. She eventually even takes command of her own group of fighters.
* Creed from ''Manga/BlackCat'' does this in the anime, though this was not present at all in the manga. Which makes it all the weirder why they decided to make him more perverted and depraved than in the manga.
* In ''Manga/{{Claymore}}'', [[spoiler:Isley does this during the timeskip when he was living with Priscilla and Raki. Too bad the audience only finds out right before his death.]]
* In ''{{Gundam 00}}'', [[spoiler:A-LAWS members [[ColonelBadass Kati Mannequin]] and [[IneffectualSympatheticVillain Patrick Colasour]] vanished after the TimeSkip. Then they come back under the Katharon to help the Celestial Being attacking the A-LAWS, while reciting just how corrupted the A-LAWS is, the reason of their defection.]]
* ''Anime/NowAndThenHereAndThere'' has two of these: Lala Ru and [[spoiler:Abelia]]
* Umezawa Masahiko in ''Manga/HajimeNoIppo'', turns from a bully who constantly picked on Ippo to a faithful fan. However, Umezawa has one of the best {{character development}}s in the show.
* ''Anime/FreshPrettyCure'' has Setsuna Higashi/Eas defecting from Labyrinth, [[spoiler:undergoing a DisneyDeath]], and in the process becoming Cure Passion, [[SixthRanger Fourth Ranger]] to the girls--all in episode 23. At the end of the series, [[spoiler:her ex-comrades Westar and Soular join her on the side as good as well, also suffering a DisneyDeath when it happens.]]
** This wouldn't be the first time a ''Anime/PrettyCure'' series used this trope. Witness the previous examples of [[spoiler:[[Anime/FutariWaPrettyCure Kiriya]],]] [[spoiler:[[Anime/FutariWaPrettyCureSplashStar the Kiryuu twins]],]] and [[spoiler:[[Anime/YesPrecure5 Bunbee]].]] It also wouldn't be the last time either; another example in Setsuna's situation [[spoiler:(minus RedemptionEqualsDeath coming into play)]] is [[Anime/SuitePrettyCure Siren]], who becomes Cure Beat.
** There's also [[spoiler:[[Anime/HeartcatchPrettyCure Sasorina, Kumojakky and Cobraja]] who end up with RedemptionEqualsDeath coming into play somewhat.]]
* Scar and Lust both have one in ''Anime/FullmetalAlchemist''; however, in both cases, [[spoiler:RedemptionEqualsDeath, as Scar is killed protecting the citizens of Lior, his last act being to save Alphonse, while Lust was killed by Wrath as she tried to help Edward save his brother]].
** Also, arguably, Wrath from the movie, ''Conqueror of Shambala'', who leads Alphonse to Amestris Central City so he can open a portal to Earth, and also fights the other remaining homunculus besides himself, Gluttony. [[spoiler:But again, RedemptionEqualsDeath, since Wrath willingly sacrifices himself so Alphonse can open the portal, though he says himself all his wants to do is see his mother again in the afterlife. He gets to.]]
** [[Manga/FullmetalAlchemist The manga]] has Scar and [[spoiler:Greed]]. The latter [[spoiler:also dies, after realizing that ThePowerOfFriendship was what he [[GoodAllAlong wanted all along]], being re-absorbed by [[BigBad Father]], and ''[[HeroicSacrifice attacking him from inside]]'']]. Scar, however, [[spoiler:survives, and is recruited to rebuild the Ishvallan civilization and religion (as a WarriorMonk, he'd be quite eligible)]].
* Happens frequently in ''{{Slayers}}'' though they are more [[CharacterDevelopment Hazy-Feel Turns]], most foes being ChaoticNeutral mostly:
** Zelgadis's two henchmen Zolf and Rodimus in the first season, as well as [[spoiler:Rezo]]. Zelgadis is also established as a villain early on, but the SpoilerOpening notes his turn ahead of time.
** Zangulus and Martina in the second season (they even end up together romantically!)
** [[spoiler:Duclis]] manages to come around by the end of the fourth, although he becomes more of TheAtoner. The manga adaptation plays this straight, though. And due to his entirely different role in the novels, this never occurs there.
* In ''RaveMaster'', this happens more often than not. Julius, Shuda, Let and Lazenby all making prompt turns after losing to Haru or others. Also notable are King, Jegan and Captain Hardner, who make Heel-Face Turns [[spoiler:the exact moment before they die]]. And then there's the case of Reina, who makes a Heel Face Turn but then [[RedemptionEqualsDeath undergoes a]] HeroicSacrifice afterwards.
* Anime/LupinIIIGreenJacket has Goemon, who provides one of the most downright ''efficient'' and drama-free turns ever. When first introduced, Goemon is an all-business samurai who has declared that [[TheOnlyOneAllowedToDefeatYou he alone is worthy of killing Lupin]]. They duel a couple of times, each time ending in a stalemate. Their final confrontation ends with Lupin chasing Goemon in half a car. Realizing the absurdity of the entire situation, the two of them begin laughing and hugging like a couple of old drinking buddies. The episode ends there, and from the next episode on, Goemon is a dedicated member of Lupin's gang.
* In ''[[Anime/TsukuyomiMoonPhase Moon Phase]]'', Elfriede breaks free from her servitude to her vampire father and joins the main cast in their hunt against the bad vampires whilst remaining a vampire herself.
* Viral from ''Anime/TengenToppaGurrenLagann'' goes from being the DecoyProtagonist's rival to being TheLancer. Lordgenome himself also "joins," but in this case it's just a bio-computer whose core is his disembodied head. [[spoiler:He does later regain his full memory, though, and fights alongside the heroes in the final battle.]]
* ''OnePiece'' does this a lot. Nami, Robin, and Franky are Straw Hat members who were all initially portrayed as villains, or simply antagonistic to Luffy.
** Nami did a double HighHeelFaceTurn, posing as a pirate hating thief, [[spoiler:while being a pirate, then joining Luffy after he kicked the crap out of Arlong]].
** Robin played a DarkMistress to HookHand until doing a HighHeelFaceTurn.
** Franky [[KickTheDog beat up Usopp]] before joining the crew, and if [=CP9=] hadn't come into the picture and cut the CycleOfRevenge short, he may have never joined them.
** Several villains experience this as well to varying degrees. Buggy, while still evil, became more caring for his crew after his defeat. Hatchan (one of Arlong's subordinates), Bon Clay, and Mister 3 (of Baroque Works) all showed up again much later to become an ally of the Straw Hats; even the arrogant leader of Baroque Works, Crocodile eventually allies himself to Luffy in his escape from Impel Down, and though dismissing it simply as [[EnemyMine something he's doing because his own convenience]], he ends going out of his way to save Luffy from a certain death in the battle of Marineford. Notably, [[PsychoForHire CP9]] defects from the World Government after their defeat…but in all likelihood, they turned from Heels to [[WildCard Wild Cards]].
** Technically, there's even Vivi, who started off as a de facto ArcVillain before it was revealed that she was GoodAllAlong.
** Heck, a lot of the Straw Hat Pirates' friends are formed from EnemyMine, FireForgedFriends, or DefeatMeansFriendship: the Shandorians, the Franky Family and Galley-La Company, the Rosy Life Riders, the Kuja tribe, the prisoners of Impel Down, the Whitebeard Pirates, Neptune's Army, and most recently, [[spoiler:Smoker, Tashigi, the almost AxCrazy Marines of G-5, and a pirate-hating samurai by name of Kin'emon (though he's far from the first pirate-hater that the Straw Hats befriended). Smoker and Tashigi already respected them because of the Alabasta incident; just how close they are now has yet to be revealed. But their subordinates? Much to Smoker's exasperation and Tashigi's amusement, they've stated that they'll start admiring the Straw Hats unless they act as if they're no different from other pirates.]]
* ''Manga/{{Bleach}}'' is full of these. Perhaps the most notable is that in the final arc, [[spoiler: Ginjo, Tsukishima and Giriko from the Fullbringer arc reappear in Soul Society, training with Kukaku and Ganju for the next Vandenreich invasion.]]
** And the opposite. Also notable that several characters switch ''sides'' without altering their personal moralities at all.
* Is a defining characteristic of ''ShamanKing'', particularly so in the manga. The Messianic hero converts all villains to his side, one after another, with his laidback attitude and genuine empathy for their motives. The heel face turn often is so through, it recast the character in a whole new light. Homicidal Chinese boy Tao Len is shown as a proud warrior with a sense of duty, while bully and delinquent Ryū is revealed to be a working-class champion and a road-travel hero.
* This is all over the place in ''KenichiTheMightiestDisciple''. Almost all the members of the Shinpaku Alliance were originally Kenichi's enemies at some point.
** This is a DefeatMeansFriendship show. Mostly. Exceptions are made for particularly impressive psychos and the lead, who does not betray his principles when defeated. Which is good, because he loses enough early on that it would have become a fascinatingly schizophrenic series if he had.
*** That actually sounds kind of cool. You could set it up a little like [=JoJo=]'s.
* In ''RosarioToVampire'', every girl in Tsukune's Harem, other than Moka (and possibly Yukari, who initially behaved more like a ScrewySquirrel than anything), started out trying to kill, control or abuse him. As did their club president, Gin.
* In ''OutlawStar'', the evil Anten Seven's leader Hazanko sends elite assassin Shimi (a.k.a Leilong) to eliminate Gene Starwind when he is considered a threat to his plans. Gene faces a much weaker assassin and impostor of the real Shimi but barely wins. The real assassin converses with Gene in a bar as Leilong and you can tell he is thinking about making a serious change in his life while not revealing his true identity as an assassin to Gene. Later on, Leilong engages in a CurbStompBattle against Gene and his crew. Gene the last one standing of his crew agrees to a gun duel to the death which has Leilong get "killed" because of his faulty gun. Turns out the whole battle was orchestrated by the assassin to fake his own death, and to leave the Anten Seven. WordOfGod states that Shimi was actually a Dragon and his power was SECOND to Hazanko's level, so if Shimi didn't have that Heel Face Turn the Outlaw Star crew (who were much weaker at the time) would have been killed off before the hunt for the Galactic Leyline.
* In ''NabarinoOu'', just about all of the main "bad" characters introduced early on end up [[spoiler: teaming up with the good guys in the end to defeat Fuuma. Though most switch sides much earlier on.]]
* ''LightNovel/ACertainMagicalIndex'' is partial built on this trope, as one of the themes of the story is that there are no bad guys in the conventional sense. In order of appearance they are:
** [[spoiler:Accelerator]], who then goes on to become the secondary protagonist of the series.
** [[spoiler:Unabara Mitsuki]]
** [[spoiler:Sherry Cromwell]]
** [[spoiler:Agnese Sanctis and the Agnese Forces.]] Though it could be argued that it was a change of situation, rather than a change of heart.
** [[spoiler:Hamazura Shiage]], who then goes on to become the tertiary protagonist of the series.
** [[spoiler:William Orwell (Acqua of the Back)]]
** [[spoiler:Carrissa and Knight Leader]]
** [[spoiler:Vento of the Front]]
** [[spoiler:Misaka WORST]]
** [[spoiler:Mugino Shizuri (The Number Four: The Meltdowner)]]
** [[spoiler:Fiamma of the Right]]
** [[spoiler:Kuroyoru Umidori]]
** [[spoiler:Kakine Teitoku (specifically Rhinoceros Beetle 05)]]
** [[spoiler:Magic God Othinus]]
* In the original English language manga ''AmazingAgentLuna'', Timothy Hyatt, upon learning Elizabeth Westbrook is to be killed, switches sides and helps her escape. He later returns to deal with his former partner, Martin Williams.
* It is unclear when [[spoiler:Yuri Nakamura]] in ''Anime/AngelBeats'' made the turn, but there are two very likely candidates. The first is in episode 11 when she [[spoiler:orders the SSS to put some serious thought into passing on before the Shadows overtake them like they did Takamatsu]]. If that doesn't seal the deal, then the climax of episode 12, where she [[spoiler:blows those computers to hell that were responsible for the Shadows in the first place]] definitely does.
** Kanade Tachibana goes from Type IV AntiVillain to {{Woobie}} very quickly after being deposed from the Student Council. Her subsequent reinstatement at the end of episode 9 can be seen as a HeelFaceRevolvingDoor, but [[spoiler:Yuri quickly starts agreeing with her after one of her own boys gets taken down by the mysterious and malevolent Shadows]].
* At the end of ''ZettaiMutekiRaijinOh'', [[KidHero Jin's]] parents convincing the villain's {{mook}} Taida to [[MookFaceTurn switch sides]] turns out to be a CrowningMomentOfHeartwarming. Later on, Taida's boss actually follows and has a Heel Face Turn of his own.
* Several characters in ''Manga/PokemonSpecial'', namely: [[spoiler: Sabrina, Koga, Lt. Surge, Blaine and Mewtwo, the Kanto Elite Four (save for [[KarmaHoudini Agatha]]), Will and Karen, Pryce, Courtney, Tabitha, Amber, Deoxys, Cyrus and all the Team Galactic commanders (except for Charon.)]]
* ''Manga/MagicKnightRayearth'' has a quite few of these, the number of which depending on whether you saw the manga or anime. In the manga and anime, Ascot, Caldina, and Lafarga, who all served Zagato in the first storyline for various reasons (wanting somewhere to belong, money, and mind control, respectively), all do a Heel Face Turn thanks to the Magic Knights. The anime also adds Alcyone, Eagle Vision, and Nova to this list.
* ''Manga/YuYuHakusho'' has several of these throughout the series, including (in order of side-changing) [[spoiler:Kurama (kinda; he wasn't ''really'' evil anyway, at least not within the show's scope), Hiei, Rinku, Chuu, Touya, Jin, Suzuka, Shishiwakamaru (once {{retcon}}ned into surviving his battle with Genkai), and Seaman/Kyoshi Matarai.]]
** Plus Yusuke himself, kinda, at the very start. And Yomi, sort of, toward the end.
* In ''{{Negima}}'', Kotaro underwent one of these after the Kyoto arc. More recently, [[spoiler: Shiori/Luna seems to be on Negi's side now, although Ala Alba is still certainly suspicious of her. Though now that Fate survived the attempted [[HeelFaceDoorSlam door slam]] on his own Heel Face Turn, it's assumed that all of Fate's pactio partners including Shiori have officially switched sides as well.]]
* ''SpaceBattleshipYamato'''s BackFromTheDead EnsembleDarkHorse Desslok starts to turn good after Wildstar faints of blood loss when trying to challenge him to a duel. Upon realizing Wildstar cares for Earth as much as Desslok cares for Gamalon, he realizes they are NotSoDifferent after all. In the third movie, Dessler and the Yamato are StrangeBedfellows, both trying to save Iscandar. By the time of the third TV series and final movie, full HeelFaceTurn has been completed and he is Earth's most powerful ally.
* In ''[[TransformersHeadmasters Transformers: The Headmasters]]'', Sixshot turns against the Decepticons at the end, after befriending Daniel in an earlier episode when both were stranded on the planet Daira.
* Bootsvorz from ''Anime/FutureGPXCyberFormula'' does this after being betrayed by his evil boss Smith one too many times, [[CarFu he uses his car and drives it through Smith's helicopter]], killing him.
* ''TrinityBlood'' has several examples Abel and Tres do this in their backstories. Then is Radu (who has a HeelRealization) in The Iblis ending. Surprisingly [[spoiler: Dietrich]] in the Stories Untold.
* In ''TenshiNiNarumon'' [[spoiler: Mikael, after acting like a nice guy for the majority of the series and then turning into an evil and insane twit, does exactly this. Yes, the boy has issues]].
* ''TsubasaReservoirChronicle'' seems to love this trope. The most noticiable example is [[spoiler: Fai, who is revealed to have been working for Fei Wong,]] but has a change of heart following the events of the Acid Tokyo and Infinity arcs. [[spoiler: Xing Huo]] might count as another example, as she eventually [[spoiler: betrays Fei Wong by helping the real Syaoran to escape,]] and [[spoiler: the clone Syaoran]] also undergoes this transformation durring the FinalBattle with Fei Wong. Although, one might say that [[spoiler: Fai]]'s was a bit more sucessful than the [[RedemptionEqualsDeath latter two's]]...
* In an inversion of the MoralEventHorizon trope, LightNovel/HaruhiSuzumiya becomes [[CharacterDevelopment more]] [[JerkWithAHeartOfGold sympathetic]] toward the end of the second light novel, ''Sigh'', as well as its anime adaptation following a close brush with Kyon's fist for not only spiking Mikuru's drink and leaving her open to possible rape but also calling her ''her toy''.
* ''ZatchBell'' has several of these: Pamoon, Penny (Patie), and Byonko in the Ancient Mamodo arc; Purio (Papipurio), Rodeux and Zeno (Zeon) in the Faudo arc; and Gorm (Goomu) in the King's Festival arc. Unfortunately, RedemptionEqualsDeath (or returning to the Mamodo/Demon World) for all of the above examples except Purio (and Zeno, who was "dying" just as his HeelFaceTurn was finalized).
** There's also Zeno's partner, the psychic genius Dufort (Dufoux); sold to a mad scientist by his mother at a young age, he met Zeno immediately after he was left to die. The hatred he had ran deep, but thanks to the true power of Zatch's (Gash's) Bao Zakeruga spell, it dissolves, and he becomes a crucial ally in defeating the final BigBad.
* Ryoko in ''TenchiMuyo'' especially the TV AlternateReality of ''TenchiUniverse'' who starts out as a space pirate (Along with Hakubi Washu) who reforms upon falling in love with Tenchi. In the original OVA it turns out she was under a type of mind control.
** Zero fills the trope much better in the OVA after uhhhhh ... she? betrays Dr Clay because she refuses to follow his orders to kill Tenchi. She later merges with Ryoko.
* Sasame in ''{{Pretear}}'' after his earlier FaceHeelTurn is seen in the end happily living with Takako. Takako also decides she's had enough and switches sides in the end, it doesn't help much because she's still used by the BigBad Tree of Fenrir but can't hate her for trying.
* Subverted in the ''Manga/SoulEater'' manga -- Crona had changed sides, but comes back to the dark side at Medusa's request. And to make things worse, [[spoiler:Crona kills Medusa and now goes on collecting the Kishin eggs]]. The face turn sticks in the anime.
** To a lesser extent, Black Star. He's not really a villain, but he's an arrogant son of a bitch only looking out for himself and generally willing to injure anyone in his way to prove he is the "strongest", even once threatening to his own friend, Maka, that he would beat her up. Later, he becomes more caring towards others and more noble.
* In ''Manga/ArataKangatari'', this is, so far, what essentially happens for any Shou who unites under Hinohara's cause, whether it be through joining his travelling group or submitting to him and his hayagami.
* Hiyori from ''Manga/KotouraSan'' does one after episode 4, when she realized she caused a lot of trouble for Manabe and didn't understand how much pain [[BreakTheCutie Har]][[HopeIsScary uka]] was trying to hold in.
* Lady Liebert and half of her comrades of Nepos does this midway through ''Anime/MajinBone''
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