* Meruem of ''Manga/HunterXHunter''. He starts as a genocidal monster, who murdered his own mother right out of the womb by tearing his way out of her. He viewed humanity as something to crush, destroy and ''consume'' for his own amusement. As he plays Gungi with Komugi, he undergoes giant changes in his world view, admittingly still being a SocialDarwinist near the end, but believed certain humans are worth saving and truly wanted to make a perfect world where those special people could live happily.[[spoiler: He dies peacefully with the woman he loves, realizing in the end he was born entirely to be with Komugi in his final moments, nothing else.]]
* Sakura Haruno from ''Manga/{{Naruto}}''. She goes from a JerkAss {{Tsundere}} who beats up Naruto and swoons over Sasuke, to a more vulnerable but rather more kind-hearted CombatMedic.
** Kakashi goes from an arrogant, selfish brat who is angry with the world to the much kinder and humble person he is today because of what Obito taught him.
** After his [[DefeatMeansFriendship defeat]] by Naruto, Neji goes from an {{Jerkass}} ArrogantKungFuGuy who [[KickTheDog harshly beat his cousin Hinata]] to a generally nice guy who shows concern when she is injured and supports her crush on Naruto.
** There's also Neji's uncle, Hiashi Hyuuga. Starts off treating Hinata as the UnFavorite (due to her being weaker and more passive than her sister), but by part 2 they seem to be on better terms.
** Kankuro also qualifies, starting off as an arrogant, HotBlooded JerkAss and becoming noticeably kinder in Shippuuden, partly due to his improving relationship with Gaara.
** Many people overlook it, but Sasuke did this for a short period. Team Seven managed to bring him out of his shell to the point that he was willing to die to defend them. Then Itachi scrambled his brains and he ended up [[TookALevelInJerkass power-levelling in Jerkass]].
*** In the second half of the Shinobi World War, [[spoiler:he gets this after having decided to go from avenger of the Uchiha Clan to protector of the Hidden Leaf Village.]]
** Gaara himself is also one, thanks to his defeat to Naruto.
** While he already was Naruto's ally, [[spoiler: Kurama]] takes a '''big''' level [[spoiler:after Neji's death]] by going out of his way to remind a distressed Naruto of the sacrifices others made for him, [[spoiler:even those that were caused ''by Kurama himself''. It wasn't too long ago that a similar incident was used to the Kyuubi's advantage to persuade Naruto to release the seal...]]
* Piccolo from ''DragonballZ'' went from a raving, sadistic psychopath and a literal ''Demon prince'', to one of the most levelheaded characters, all thanks to the kindness of a single child!
** Granted, this is probably because he only turned after he [[YouKilledMyFather fulfilled his revenge against Goku]].
** Another example from Dragonball Z is Vegeta, the last remaining pure-blood Saiyan who retains their nature and pride. Once he finally turns against the one responsible for their genocide, he relocates to earth (with little choice) and grows soft in the presence of the other Z Fighters...and, after a decade or so, his wife and son. But even though his HeelFaceTurn is made official near the end of the series (because it took that long), he doesn't make it past JerkWithAHeartOfGold. He comes about as close as is possible, but he never sheds his Saiyan nature.
* Ken from ''DigimonAdventure02'' after his HeelFaceTurn. Particularly appropriate in that Kindness was always intended to be his Crest from the beginning.
** But only in the dub. That is, Chiaki J. Konaka apparently went out of his way to avoid depicting Rika/Ruki as 'cold' because 'coldness' is often attached to female characters to convey strength. She's mature and stoic, but she's not cold.
** Also Rika from ''DigimonTamers'' gradually becomes [[DefrostingIceQueen less cold-hearted]] and friendlier towards Takato, Henry, and the other Tamers.
** Her partner, Renamon, qualifies as well. Originally ruthless, she goes to a general MamaBear, mostly from her relationship with Rika improving.
** Yamaki is also one from the said series. From a WellIntentionedExtremist who wants to wipe out Digimon to supporter of the Tamers in battling evil Digimon.
* Syaoran Li of ''Manga/CardcaptorSakura'' evolves from an ArrogantKungFuGuy with {{Tsundere}} qualities to [[ShrinkingViolet meek and soft natured]] DoggedNiceGuy for Sakura. Meiling of the anime adaption goes through a similar evolution. Both cases are largely due to Sakura's own increasingly [[FriendToAllLivingThings empathic]] and [[{{Moe}} innocent]] aspects (though granted, she was already rather sweet natured by the start of the series' run).
* In ''Anime/HaibaneRenmei'', this is an important part of [[spoiler:Reki]]'s character development. [[spoiler: Realizing that she has done this is what allows her to escape the EpiphanicPrison.]]
* Kyouko from ''Anime/PuellaMagiMadokaMagica'' starts as an AxCrazy JerkAss. But after learning [[spoiler: the AwfulTruth about what ultimately happens to magical girls]], she starts showing her HiddenHeartOfGold, more specifically towards [[spoiler: Sayaka Miki]].
* Guts of ''Manga/{{Berserk}}'', upon finding Casca again and gaining new TrueCompanions, has begun abandoning his cold, ruthless and vengeful Black Swordsman persona in favor of something resembling his original nature for the first time since the Eclipse. Mind you, he still has a rather nasty EnemyWithin to deal with due to the vendetta that he was on for two years.
** Even better would be Farnese, who was once a cold, KnightTemplar, PyroManiac who wanted nothing more than to burn people at the stake for her own satisfaction and to see Guts dead. But after the events at the Tower of Conviction, and wanting to [[TheAtoner atone for her past actions by following Guts]], she has grown considerably kinder and is even shown to being [[SugarAndIcePersonality sort of naive and manipulable]].
* Gary Oak/Shigeru in ''Anime/{{Pokemon}}'' becomes much nicer to Ash around the Johto arc after his BreakTheHaughty phase in the Kanto arc. By the end of the Johto arc, he and Ash finally become friends again after so many years to being rivals (which sticks when they meet again in Sinnoh).
** Georgia, Iris's rival from the Unova arc, has been slowly improving, and has been consistently taking levels from {{Jerkass}} to JerkWithAHeartOfGold as the arc goes. (Her rivalry with Iris has also eased a little bit, with their bickering starting to sound a little more good-natured than either of them would probably admit.) [[spoiler: When she shows back up for the Pokemon World Tournament Junior Cup she's improved even more, only being bitter about her loss to Iris because Iris's Dragonite beat her when it wasn't listening to commands, so [[JerkassHasAPoint technically Georgia and Iris weren't even the ones fighting]]]].
** Bianca practically drives herself (and everyone else) crazy trying to get at Luke's Zorua during the Club Battle arc. Fortunately for all parties involved, [[ThrowTheDogABone she finally ends up getting to spend some time alone with Zorua]] and undergoes some CharacterDevelopment a few episodes later that generally turns her into a more selfless, charitable person.
* This is the driving force behind the plot of ''OnaniMasterKurosawa'': A cynical jerk who sequesters himself from the rest of the world softens over time, beginning with [[spoiler: his falling in love for the first time]] and ultimately culminating in [[spoiler: him becoming TheAtoner after he [[MyGodWhatHaveIDone realizes that he's badly hurt one of his few friends.]]]]
* Nami from ''OnePiece''. Gradually as the series has gone on, but especially after the timeskip. From forgiving Hachi, to immediately hugging Usopp and Chopper when they reunite, to even immediately forgiving Jinbei for letting Arlong loose on East Blue, she's come a pretty long way from the JerkassFacade she started out with.
** Not to mention, she almost never hits her crewmates anymore, starting after the timeskip. Though this maybe because of her crewmates beating her to the punch.
** Also, as seen in his flashback, Jinbe was previously quite brutal when fighting against humans and couldn't care less about humans in general. His interactions with his captain Fisher Tiger and the human girl Koala and being inspired by Queen Otohime helped to change his outlook and become a more kinder person. This was very notable in that he is so far the only Shichibukai whose past changed him for the better.
* ''InuYasha'': Inuyasha, Sesshoumaru, Kouga, and Kagura all experience this at varying speeds and to varying degrees.
* After Laxus Dreyar's failed attempt to take over the title guild in ''Manga/FairyTail'', he [[WalkingTheEarth Walks The Earth]] and [[TameHisAnger Tames His Anger]]. He returns without his trademark SocialDarwinist attitude, but he hasn't completely [[JerkWithAHeartOfGold lost his edge]].
** This is also a huge part of Mirajane's backstory. She was an EnfantTerrible in her younger days, but the shock of losing her little sister caused a massive shift in her personality, and she evolved into the guild's beloved TeamMom.
* Ayaka from ''Anime/StellviaOfTheUniverse'' qualifies as she goes from a GoGetterGirl who's prone to [[spoiler:[[MakeItLookLikeAnAccident giving people who are better than her accidents]]]] to a kind girl who not only has a RomanticTwoGirlFriendship with Yayoi, but also acts as an adviser of some sort to Kouta when it comes to being with Shima.
* Tomoe from ''Manga/KamisamaKiss'' starts out as a 100% pure JerkAss but it doesn't take long before we start to see hints of a hidden heart of gold.
* Garai in ''{{Manga/MW}}'' goes from teenage delinquent to [[TheAtoner atoner]] priest after having witnessed many people killed at Mafune Island.
* Yui in ''Manga/FushigiYuugi'' goes from PsychoLesbian to RivalTurnedEvil in the series, but at the end redeems herself and spends the [=OVAs=] as TheAtoner.
* Onpu Segawa in ''Anime/OjamajoDoremi'' was initially a spoiled, cold, enigmatic, and selfish {{Jerkass}}. By ''Sharp'', she's now portrayed as kind-hearted, sweet and caring NiceGirl.
** Majo Rika started off as very brash and rude to Doremi for [[BalefulPolymorph cursing her into a Witch Frog]]. She eventually grows to care for the girls as they come under her tutelage while remaining a JerkWithAHeartOfGold.
** Reika Tamaki started off as your stereotypical AlphaBitch before beginning to question whether her BumblingDad really loved her or not. [[PetTheDog She even took local IllGirl Shiori under her wing.]] By ''Motto'', she was pretty much a LovableAlphaBitch JerkWithAHeartOfGold.
* The StealthSequel to ''Manga/MahouSenseiNegima'', ''Manga/UQHolder'', shows that Evangeline has mellowed out a ''lot'' since her introduction. She's introduced in the new series as a teacher who acted as a ParentalSubstitute to the protagonist after his parents died in a car crash.
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