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9[[quoteright:349:[[ComicBook/TheLifeAndTimesOfScroogeMcDuck https://tvtropes.org/pmwiki/pub/images/scrooge_journey_to_villain350px.png]]]]
10[[caption-width-right:349: "[-It took me twenty years to strike it rich because I always played it square! I've decided to adopt '''new''' methods now!-]"]]
11
12->''"You were right about me all along, Mr. Kent. I am the villain of this story!"''
13-->-- '''Lex Luthor''', ''Series/{{Smallville}}''
14
15The Protagonist's Journey to Villain is a plot in which the protagonist, who starts out well-intentioned, turns into a monster. In other words, it's the making of the VillainProtagonist. Sometimes this plot can be backstory, perhaps overlapping with StartOfDarkness.
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17For example, Bob, [[IdealHero the happy idealist and doer of good]], endures a TraumaCongaLine, loses his loved ones [[HeWhoFightsMonsters and his morals through a series of battles with evil]], and [[BecameTheirOwnAntithesis becomes just the opposite of what he once was]]. He is now a cruel, immoral evildoer.
18
19However, note that this descent into evil has to be the focus of the plot or at least a very important plot point. A mere mention that a bad person was once good is not enough for this trope. This trope is about the ''journey'' to evil, not the traveler (Bob), nor the destination.
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21This is the primary arc in many a {{Tragedy}}, which usually ends with the death of the hero-turned-villain as its source of audience catharsis.
22
23This is a subtrope of FallenHero, in that this is the journey of the Protagonist. Related to TragicHero, HeWhoFightsMonsters, TheParagonAlwaysRebels, FaceHeelTurn, BecameTheirOwnAntithesis, and UsedToBeASweetKid. Compare and contrast StartOfDarkness, where a previously established villain's backstory is revealed. Compare BigBadSlippage, where a character who may or may not be the protagonist becomes the BigBad over the course of the story, or SuddenSequelHeelSyndrome, where the "journey" happened off-screen between installments and at best might be elaborated upon. Contrast RedemptionQuest and RogueProtagonist, where the main character from a work becomes the villain in the sequel.
24
25'''SPOILER WARNING!''' In many cases, the mere fact that this trope applies to a work can be a spoiler. Read at your own risk.
26----
27!!Example subpages:
28[[index]]
29* ProtagonistJourneyToVillain/LiveActionTV
30* ProtagonistJourneyToVillain/VideoGames
31[[/index]]
32
33!!Other examples:
34
35[[foldercontrol]]
36
37[[folder:Anime and Manga]]
38* ''Manga/AttackOnTitan'' has ''the entire series'' focused on [[spoiler: [[VillainProtagonist Eren Yeager's]] journey to become the BigBad of his own series.]] [[spoiler: Eren]] begins his journey [[UnscrupulousHero mentally unhinged but antiheroic]], then learns to grow up but develops a grudge against all the corruption he finds in society, and [[spoiler:when he learns just how far the corruption reaches and how long it has been going on]] he snaps; he has a well thought out, carefully considered plan that is outright villainous even with its idealistic aims. Though exactly what is going on remains ambiguous. [[spoiler: Over the last several months leading up to his attack on Liberio, he was secretly conspiring with Zeke's group and a rogue element within the military itself. Since being brought home, he has refused to explain himself to his old friends and even threatened them with his powers. As Paradis braces for a potential retaliation from the rest of the world for Eren's attack, his actions have also inspired a xenophobic movement that seeks to unseat the current government and restore the old Eldian Empire. With Commander Zackley's assassination coinciding with Eren breaking himself and his followers out of prison, the nation is a powder keg with Eren being set to oppose his former comrades. Finally, Eren manages to reach the mental world of the Titans, speak with the first human to ever be oppressed by them, and gives her free reign to do whatever she wants. Including the choice to destroy the entire world by stomping on everyone with an army of freshly awakened Titans. Which was Eren's plan all along, to kill all non-Paradisians using the above-mentioned Colossal Titans.]]
39* ''Manga/{{Berserk}}'' devotes much of the Golden Age arc to the relationship between [[NinetiesAntiHero Guts]] and [[FallenHero Griffith]], and focuses on the factors which would ultimately lead Griffith to betray Guts and become his number one enemy.
40* While ''Manga/BlackButler'' started with [[BreakTheCutie Ciel]] already as a VillainProtagonist, many chapters show him getting progressively ''worse.''
41* ''Manga/BlackLagoon'': As the series goes on, "outside" character [[WideEyedIdealist Rock]] is [[JadeColoredGlasses quickly turning into]] [[ActionSurvivor something]] [[MagnificentBastard else]]. The opposite is true of [[VillainProtagonist Revy]], who has actually [[DefrostingIceQueen eased up]] thanks to Rock's optimism.
42* ''Anime/CodeGeass'' chronicles [[Characters/CodeGeassLelouchLamperouge Lelouch Lamperouge]] and [[Characters/CodeGeassSuzakuKururugi Suzaku Kururugi's]] descent into villainy, [[WellIntentionedExtremist if only to save the world]].
43* ''Manga/DeathNote'' is this for [[Characters/DeathNoteLightYagami Light Yagami]], though very, very briefly, and is more like a jump than a journey. He starts off just killing dangerous criminals, and initially is seized with fear and guilt over it, but in five day's time he's not only completely gotten over it, but has written more names in the notebook than Ryuk has ever seen one human do. It's only a few chapters/episodes before he claims that [[UtopiaJustifiesTheMeans since his intentions are noble]], and the police are trying to stop him, it's perfectly acceptable to murder them as well; to top that off, at this point he's already dripping with gleeful smugness every time he [[OutGambitted outsmarts]] a bunch of honest cops, or in one case, the widow of an honest cop he murdered. And from there, things go FromBadToWorse.
44* This is played with in ''Manga/DestinyOfTheShrineMaiden''. Chikane, being rather attracted to Himeko who already seems interested in someone else, begins to go a tad conflicted. This reaches a head when [[spoiler:one of the Orochi Heads uses her desires for Himeko to try and kill her in a scene that remains one of the most well known...for reasons]]. As a result, [[spoiler:Chikane has her way with Himeko, steals Ogami's Orochi mech, kills the other Orochi Heads and awakens Orochi herself.]] Where the 'played with' part comes up is that [[spoiler:Chikane never became evil, she was doing a BatmanGambit to get Himeko to kill her for the world rebirth ritual to be complete and in order to push her far enough to summon a god by herself since a memory of her old self implanted a hatred for said god in the back of her mind.]] Ultimately, Chikane [[spoiler:saved everyone at the cost of her own happiness, but the ending in both the manga and anime suggest that she was given what she wanted in all of her lives but never got.]]
45* Haruko from ''Anime/{{FLCL}}'' and [[Anime/FLCLProgressiveAndAlternative its sequels]], particularly if you believe that ''Alternative'' is a StealthPrequel. In that series she's friendly and, aside from some MemeticMolester behavior, doesn't really do anything villainous. ''FLCL'' has her [[AmbiguouslyEvil ambiguous]] for most of the season before turning her into the BigBad, while ''Progressive'' has her at her most antagonistic.
46%%* ''Manga/FutureDiary'', turning TheWoobie into... well, [[WellIntentionedExtremist something]] [[AxCrazy else]] [[WoobieDestroyerOfWorlds entirely.]]%% Zero Context Example
47* Prequel anime ''Anime/GaReiZero'' is mostly about Yomi's StartOfDarkness and how she became the first BigBad of ''Manga/GaRei''.
48%%* This happens to Michi in Creator/OsamuTezuka's original ''Anime/{{Metropolis|2001}}'' manga. %% Zero Context Example
49* Shinn Asuka of ''Anime/MobileSuitGundamSEEDDestiny'' starts out as a standard JerkWithAHeartOfGold. As the series progresses, his anger issues begin to consume him entirely and he becomes TheBerserker, and eventually an {{antivillain}}ous [[TheBrute Brute]] following TheReveal that his boss has been BigBad all along. He gets over it after his defeat. Arguably it's a good thing he progressed in this way because he unknowingly worked for the BigBad all along and when [[BlindedByRage consumed with anger]] he becomes a much less effective fighter and ended up being defeated relatively easily by his former mentor Athrun despite previously establishing himself as the superior pilot of the two.
50* A good half of the plot of ''Manga/{{Naruto}}'' focuses on the slow decline of [[TheRival Sasuke]] from angsty-but-loyal to full-on villainy and the titular character's (mostly unsuccessful) attempts to stop this.
51** The slow descent ended the instant [[spoiler:Tobi]] got his claws into Sasuke. With a bit of egging on by the master manipulator, Sasuke [[JumpingOffTheSlipperySlope dives headlong off the slope]]; even his teammates who had suffered under Orochimaru were stunned by his sudden swerve into open murder.
52** Tobi ''would'' know all about this trope, with his being [[spoiler:Obito]] and all. He knew exactly how to move Sasuke along that path, because [[spoiler:Madara did the same thing to him]].
53* ''Manga/NegimaMagisterNegiMagi'': It appears at some point that this may be the fate of poor Negi Springfield, who starts the series as a StepfordSmiler brought on by a DarkAndTroubledPast. [[spoiler:As he and his students become involved in magic and the magical world, he begins to put his students in trouble and he blames himself for everything. In the Magic World arc, things get worse and he learns BlackMagic]]. Now struggling with TheCorruption and the danger of becoming an inhuman demon, it's only [[spoiler:his TrueCompanions]] preventing the [[JumpingOffTheSlipperySlope jump off the slippery slope]] [[spoiler:while his enemies and his master want to push him over the edge. Though whilst his master would rather he was ''evil'', they don't want him mindless. Unlike the enemies.]]
54** Subverted. In the end, while Negi has become something [[HumanoidAbomination more than human]], maybe even [[OurDemonsAreDifferent of a demonic nature]], he is still just as heroic and idealistic as he was beforehand. It was merely a test of TheHerosJourney.
55** In the StealthSequel that takes place in an alternate timeline, ''Manga/UQHolder'', [[spoiler:however, this is [[DoubleSubversion double subverted]] as Negi fails to defeat the BigBad in the final battle and instead falls under the control of The Lifemaker, fusing with her]] in a similar manner to [[spoiler:Yuuji Sakai]] from ''Literature/ShakuganNoShana''. Then in the finale [[spoiler: it becomes subverted once again, as Touta manages to find a way to bring Negi back to his senses and fight on the heroes side.]] However at the same time, [[spoiler: the Lifemaker then reveals that she also has control of previous LivingLegend and former hero Nagi Springfield as a backup upon losing Negi.]]
56* ''Anime/PuellaMagiMadokaMagica'' episodes 3-8 count as one for [[spoiler:Sayaka Miki]], [[KnightInShiningArmor of all people]], [[spoiler:as she goes from wannabe hero of justice to [[LoveHurts heartbroken warrior]], then to more extremist warrior, and finally [[AndThenJohnWasAZombie becomes a witch]]]].
57** As of the movie ''[[Anime/PuellaMagiMadokaMagicaTheMovieRebellion Rebellion]]'', [[spoiler:[[HappyEndingOverride the entire series retroactively becomes one of these]] for Homura Akemi, who becomes a SatanicArchetype and traps everyone in a LotusEaterMachine so that [[AmbiguouslyEvil they can finally have a chance to live a normal, happy life]]]].
58* ''Literature/RingingBell'' has this happen to Chirin. A cute little lamb grows up and turns into a murdering demonic ram.
59* ''Manga/TheRoseOfVersailles'' has a downplayed case with Marie Antoinette; even at her worst Marie's [[BenevolentBoss personal]] [[GoodParents virtues]] shine through, but her arc still has elements of this. Her precocious infatuation with all things gaudy and glittering spin an innocent princess into a rigid queen who is utterly unwilling to compromise her life of power and luxury, and her refusal to elevate the people at any expense to the royal family is a major contributing factor to the revolution's bloody turn. With Louis XVI's dithering, the story splits responsibility for the violence between Antoinette and Robespierre; Robespierre might have been an opportunist, but Antoinette's adherence to a system built to facilitate decadence and excess gave him his opportunity. In the end, even [[spoiler:Oscar]] sides against her.
60* The infamous martial arts manga ''Manga/{{Shamo}}'' is about a boy who kills his parents, goes to prison, gets raped, and then carries on to become the most psychopathic martial artist ever conceived.
61* Initially in ''Manga/SunKenRock'', Ken is okay with having a small gang that can pass up as posers thinking ''way too big'', but as things go Ken's influence actually creates a parallel state. He becomes a big shot, a true criminal in real life standards by owning corrupt casinos, idol agencies and real estate companies. That's where Ken starts doubting himself, being rather careless about rivals trying to destroy or seize his empire, as he thinks it could be for the best.
62* The first half of the third season of ''Anime/YuGiOhGX'' is this for protagonist Judai. He doesn't remain a villain for long but comes out of the situation [[BrokenAce an almost completely different character]].
63[[/folder]]
64
65[[folder:Card Games]]
66* In the ''TabletopGame/YuGiOh'' card game this happens to ''Gagagigo'' who started his career as the little and cute ''Gigobyte'' and fights along with Eria the Water Charmer. As the grown-up Gagagigo he eventually left her and someday he fought Freed the Brave Wanderer, ended up being trapped in another dimension. He met Marauding Captain and fought against Inpachi, who later appeared again as Blazing Inpachi; the Marauding Captain took the bullet, which inspired Gagagigo to do the same for one of the Captain's men during the war against Invader of Darkness. Later, hoping to defeat Invader of Darkness, he asked the MadScientist Kozaky to make him stronger, and Kozaky rebuilt his body and turned him into the corrupted ''Giga Gagagigo''. When he fought against Freed the Brave Wanderer again in his native dimension, he got his own attack reflected and lost. Obsessed with gaining strength to defeat his rivals, he continued his rampage and eventually transformed into ''Gogiga Gagagigo'' and truly lost his soul.
67** The following story (which is "written" ''many'' years after his transformation) inverts his dark development as he fought Freed the Brave Wanderer again, finally overpowering him, but Marauding Captain appeared and protected him before Gogiga Gagagigo delivered the finishing blow. Instead of following his corrupted instincts, Gogiga Gagagigo understands Marauding Captain's actions and forsakes his quest for power. Thus, he finally becomes the strong warrior of justice he once sought out to be, ''Gagagigo the Risen''.
68[[/folder]]
69
70[[folder:Comic Books]]
71* ''ComicBook/{{Arawn}}'': The entire comic is about Arawn relating his life story to explain how he went from an ordinary human to the demonic EvilOverlord of the underworld.
72* The ''ComicBook/BatmanVampire'' trilogy basically looks at Batman's descent from hero to anti-villain as he battles Dracula and his vampire minions while becoming a vampire himself. In ''Red Rain'', his only victims are feral vampires who are no longer human before he confronts and kills Dracula himself, while in ''Bloodstorm'' the vampires he kills are still reasonably human in appearance but Batman nevertheless kills them all once sure that they will go on to kill and feed if he doesn't stop them. He considers himself to have crossed a line when he kills the Joker- his first human victim- and drinks his blood in a moment of blind rage, but after spending time immobilised in his coffin (staking alone just paralyses vampires in this continuity), he suffers a serious SanitySlippage. When Alfred removes the stake in ''Crimson Mist'', Batman has regressed to a feral AntiVillain state, the Dark Knight killing basically all of his traditional rogue's gallery. He is only prevented from being an outright villain because everyone he kills was unquestionably a killer themselves, but he's aware that his appetite will drive him to prey on innocents once all deserving prey in Gotham has been eliminated.
73* ''ComicBook/GreenLantern'': [[Characters/GreenLanternHalJordan Hal Jordan's]] descent into madness after the destruction of Coast City, which eventually led to him taking the name Parallax and annihilating the rest of the Green Lantern Corps in order to claim the powers of Oa for himself, was one of the largest and best-realized examples of this trope. Then Parallax was {{retcon}}ned into a quasi-demonic spirit of fear...
74* ''ComicBook/{{Irredeemable}}'' is about a SupermanSubstitute called the Plutonian who suffers a complete mental breakdown and [[FaceHeelTurn flips from hero to villain]] in [[GoingPostal a superpower-assisted spree killing]]. Part of the book involves looking at how he got to that point. [[spoiler:Some of his former teammates seem to have started down that same path while trying to stop him...]]
75* The entire ''ComicBook/TheLifeAndTimesOfScroogeMcDuck'' series captures Scrooge's development through life, how his experiences and hardships shaped him from optimistic youth to the money-hungry villain he was in his debut and his eventual redemption. If you pay particular attention to the portraits of the main albums, he gets progressively meaner with each portrait until he ends up a broken old man.
76* ''ComicBook/TalesOfTheJedi: Dark Lords of the Sith'' is about how Exar Kun and Ulic Qel-Droma turn to TheDarkSide. It's a much shorter trip for Kun, who had serious anger issues and a bit of FantasticRacism all along. Qel-Droma, on the other hand, is first subjected to TheCorruption while trying to infiltrate a Sith cult, then ends up killing his own brother and becoming TheDragon to Kun.
77* The "Barren Earth" backup feature in ''Warlord'' is effectively this for Jinal Ne'Comarr, who starts out just wanting to defend earth from the Qlov. By the time that "Barren Earth" became an independent miniseries, ''Conqueror of the Barren Earth'', Jinal is determined to [[ExactlyWhatItSaysOnTheTin conquer the world by force]]. Interestingly, [[GreyAndGrayMorality Jinal is the hero of the story]].
78* ''ComicBook/WarriorCatsTheRiseOfScourge'' is about how a cute little kitten named Tiny became Scourge, ruler of [=BloodClan=] and EvilCounterpart to TheHero Firestar.
79* ''ComicBook/{{Watchmen}}'' has this as a subplot for [[spoiler:Veidt]].
80* ''Winter Soldier: The Bitter March'' has [[spoiler:Ran Shen]], already unsure of the morality of Cold War era ComicBook/{{SHIELD}}, finally be tipped over the edge by ComicBook/NickFury [[ShootTheDog shooting one dog too many]] and [[HeelFaceDoorSlam ruining]] the Winter Soldier's attempted HeelFaceTurn.
81[[/folder]]
82
83[[folder:Fan Works]]
84[[AC:{{Crossover}}s]]
85* ''Fanfic/{{Amenaza}}'': Naruto's fall into darkness after becoming a Hollow is extensively detailed, as he turns against his former friends and aims to make them ''suffer''.
86* ''Fanfic/ChildOfTheStorm'' occasionally notes how both Magneto and Loki went down this path and managed to turn away. It also hints that, unless he's careful, Harry could potentially follow the same path and become something far worse than Magneto ever was. It's not a likely possibility, but it's there.
87** It becomes significantly more likely after his encounter with the Red Room, transformation into [[spoiler:the Red Son]], and then willing transformation into [[spoiler:the Dark Phoenix]].
88* ''Fanfic/FutureAfterFailedRealms'': {{Downplayed}} in the case of Maribel Hearn, whom is confirmed to eventually become [[HumanoidAbomination Yukari]] [[ImAHumanitarian Yakumo]]. While certainly not a ''heroic'' figure, Yukari isn't entirely without redeeming qualities.
89* ''FanFic/KamenRiderWitchAlternativeTheBalladOfOscura''
90
91[[AC:''Literature/AlexRider'']]
92* ''Fanfic/TheDevilAndTheDeepBlueSea'': ZigZagged -- Alex appears to be sliding this way at times, but doesn't entirely lose his grasp on his beliefs.
93* ''Fanfic/OfMadnessAndMammals'': {{Inverted}}; despite teaming up with Yassen, and [[AccidentalMurder accidentally committing murder]] under the influence, Alex remains a largely moral and caring young man who [[spoiler:influences Yassen to gradually become a little less amoral and start reducing the collateral damage he causes]].
94
95[[AC:''Anime/CodeGeass'']]
96* In ''Fanfic/CodeGeassMaoOfTheDeliverance'', Mao's frustration, growing insanity, and desperation twist him into a much more manipulative and brutal person. Later chapters, however, appear to hint at a moral recovery.
97
98[[AC:''Manga/DeathNote'']]
99* In ''Fanfic/{{Fade}}'', L turns [[SlowlySlippingIntoEvil progressively worse]] after he gets his hands on a Death Note, containing a part of the story of Kira's rise to power.
100
101[[AC:''Franchise/DisneyAnimatedCanon'']]
102* ''[[Fanfic/BloodlinesZootopia Bloodlines]]'' follows Lucy Sang, who suffers a MiscarriageOfJustice when she's falsely accused -- and jailed -- of her brother's murder. Already the BlackSheep of her family, she travels down the path of becoming a truly fearsome, sadistic villainess.
103* Happens to Simba in ''Fanfic/TheLionKingAdventures''. Starting with [[spoiler:the deaths of Mufasa and Sarabi in ''The Master Plan'', Simba changes throughout Series Five from a hero into a fearsome killer. It turns out in ''The End'' that the Writer was manipulating everything around him in order to make him evil. However, upon realizing this, Simba changes his ways, eventually killing the Writer and saving the entire universe. He goes back to normal from then on.]]
104
105[[AC:''Series/DoctorWho'']]
106* [[http://flummery.livejournal.com/26300.html This]] quite amazing fanvid about the Tenth Doctor. The scariest part is that the song (which is also an example of this trope) actually does fit his canon personality to a T.
107
108[[AC:''Franchise/DragonBall'']]
109* ''Creator/TeamFourStar'''s playthrough of ''VideoGame/DragonballXenoverse'' shows the adventures of their character Dumplin before he becomes their universe's version of [[spoiler:Mr. Popo]].
110
111[[AC:''Franchise/FinalFantasy'']]
112* Throughout ''Fanfic/TheFifthAct'', Cloud grows increasingly embittered and frustrated, blinded by his hatred of Sephiroth and desperate to make more progress towards his goals. Then he's [[spoiler:tortured and experimented upon]], learning in the process that [[spoiler:President Shinra is his father]]. All of this leads to him getting [[spoiler:possessed by Jenova]].
113
114[[AC:''Franchise/HarryPotter'']]
115* ''Fanfic/TheDarknessSeries'': ''Harry Potter and the Descent Into Darkness''. It's ExactlyWhatItSaysOnTheTin. Harry is embittered by the abandonment of his friends following the fiasco with the Goblet of Fire [[spoiler:and [[SuperPoweredEvilSide allows the horcrux access to his mind]]]]. He finds comfort in his new [[NotSoImaginaryFriend imaginary friend]] who guides him to [[TheDarkArts Salazar Slytherin's Library in the Chamber of Secrets]] for guidance on how to survive the tournament.
116* Tristan Winter ([[ThatManIsDead formerly known as Harry Potter]]) in the ''Fanfic/TheJadedEyesSeries'' begins his journey into villainy [[BloodbathVillainOrigin when he's six years old]].
117
118[[AC:''Franchise/KungFuPanda'']]
119* ''Fanfic/TheVow'' has the StartOfDarkness of Lord Shen included for the first part of the story.
120
121[[AC:''Film/LetMeIn'']]
122* ''[[Fanfic/AColdWintersNight A Cold Winter's Night]]'' portrays the continuation of Owen's journey from where the film left off, although in anachronistic order.
123
124[[AC:''WesternAnimation/MiraculousLadybug'']]
125* PlayedWith in ''Fanfic/TheKarmaOfLies''. Adrien believes that simply being chosen to become Chat Noir grants him ProtagonistCenteredMorality; as he repeatedly reassures Plagg, he's going to get his happy ending ''regardless'' of what he does or doesn't do. With this in mind, he solely looks out for [[ItsAllAboutMe his own interests]]. But his decisions come back to haunt him, as the public comes to see him as a NominalHero at best -- especially after he skips out on the FinalBattle with Hawkmoth, then crashes an interview and accidentally reveals his SkewedPriorities. When Mayura launches [[DragonTheirFeet her final assault]], he tries to redeem himself ''purely'' to 'get what he's due', only to accidentally cement himself as a [[ConvictedByPublicOpinion villain in the eyes of the public]] when [[spoiler:Mayura stealing his Ring is mistaken for him ''willingly'' handing it over]]. Ultimately, Adrien's selfishness and [[EntitledBastard sense of entitlement]] is responsible for his own downfall, though he insists to the end that [[NeverMyFault he's not responsible for anything that went wrong]].
126** Adrien's perspective through the work also makes clear that while he considers himself morally superior to others for 'taking the high road' and [[BetrayalByInaction not doing anything about Lila]] conning his classmates, he's far more willing to act once he's ''personally'' impacted by [[TheFarmerAndTheViper her tricks]]... and when she isn't immediately brought to justice, starts plotting to take it into his own hands.
127
128[[AC:''Webcomic/MobPsycho100'']]
129* ''Fanfic/ABreachOfTrust'': Ritsu's search for his missing brother leads him into increasingly darker territory, as he becomes a WillingChanneler for Gimcrack and other spirits for the sake of becoming more powerful, among many other questionable decisions.
130
131[[AC:''Franchise/MyHeroAcademia'']]
132* ''Fanfic/AfOsGuideToAPeacefulRetirement'': In the past, Hisashi was trying to fight the corruption and cruelty of his own time by gaining power and control, only to be driven to increasingly extreme ends and eventually full-fledged villainy. In the present, he's attempting to invert this; [[LoveRedeems having a family]] motivates him to rediscover his capacity for empathy and ensure a better life for them all.
133* ''Fanfic/{{Cain}}'': While Katsuki was already a BigJerkOnCampus, once he accidentally discovers that his favorite punching bag has been chosen by All Might to become his secret successor, his {{Barbaric Bully}}ing escalates even further, to the point where he's stalking and terrorizing Izuku, trying to break into his home, and even [[spoiler:an outright murder attempt]]. All while [[IRejectYourReality telling himself]] that everything he's doing is "heroic".
134
135[[AC:''WesternAnimation/MyLittlePonyFriendshipIsMagic'']]
136* ''Fanfic/HowILostMyMother'' details Cozy Glow's StartOfDarkness, after she's betrayed and [[UnPerson Un-Personed]] by her own mother, who refuses to acknowledge and face her mistakes even after realizing she may have triggered a SelfFulfillingProphecy.
137* ''[[Fanfic/TheAssassinationOfTwilightSparkle Path Of The Tyrant]]'' follows Majesty on the descent that ultimately results in her becoming [[spoiler:the Black Star in Ragnarock]].
138
139[[AC:''Literature/MyNextLifeAsAVillainessAllRoutesLeadToDoom'']]
140* ''Fanfic/CatarinaClaesMustDie'': A deeply damaged social outcast is reborn into the role of Henrietta Garland, whom she recognizes as a minor character from her favorite game, "Fortune Lover". Said girl enjoyed the [[invoked]] CatharsisFactor of Catarina Claes' Doom Endings, and grows increasingly obsessed with ensuring ''this'' Catarina meets a gruesome fate, despite all evidence that the girl she's dealing with is completely different from the one she recalls from the games. This obsession stems so far that she considers the suffering of others WorthIt so long as she gets what she wants.
141
142[[AC:''Franchise/{{Naruto}}'']]
143* ''Fanfic/YetAgainWithALittleExtraHelp'': {{Averted}} by Sasuke; his journey down this path comes to a screeching end during the [[spoiler:Land of Waves]] arc, and he starts backpedaling furiously. By the time of [[spoiler:the Chuunin Exams]], he's effectively sprinting in the opposite direction. After getting answers from Sarutobi regarding [[spoiler:what Itachi told him]], he ends up practically at war with [[spoiler:Madara for what they've done]].
144
145[[AC:''Franchise/ThePowerpuffGirls'']]
146* ''[[Fanfic/{{Villain}} Villain: Redux]]'' follows the gradual decline of Buttercup as she becomes increasingly disillusioned with her life as a hero, due to a variety of factors. Such as getting badly scarred in an incident on Monster Island due to Blossom betraying her, with the truth getting covered up and the public fed a cover story about what happened. Her scars make the citizens of Townsville [[AllOfTheOtherReindeer increasingly wary of her]], isolating her further and further.
147
148[[AC:''Literature/TheRisingOfTheShieldHero'']]
149* ''Fanfic/ChroniclesOfTheWaywardTomeHero'': Nan starts out as an AntiVillain with good intentions. However, as the mental and physical scars start piling up, he grows increasingly cynical and unstable, ultimately becoming [[spoiler:a HumanoidAbomination intent on [[OmnicidalManiac destroying all life]]]].
150
151[[AC:''WebAnimation/{{RWBY}}'']]
152* ''Fanfic/BlackenedBluebird'' and ''Fanfic/HoldingTheWorldOnTheirShoulders'' both depict this in regards to their main character, May Marigold, but go about it ever so differently. In both, she's a huntress in training who has seen the abusive and oppressive society of Atlas firsthand and wants to do something about it. Unfortunately, this makes her an easy target for [[BigBad Salem]], who isolates her from her friends and manipulates her into a willing agent for her eternal vendetta against [[BigGood Ozpin]]. ''Holding the World'' frames this as the story of a FallenHero, a tragedy of a good person being corrupted into a monster who still clings on to her humanity. ''Blackened Bluebird'', on the other hand, frames it as the triumphant rise of a villain, a story that is certainly tragic when you take a step back, but in the moment feels like a VillainProtagonist's rise to power.
153* ''Fanfic/TheMakingsOfTeamCRME'': Cinder's character arc in this series is basically the story of how she became the monster she is in the show. She goes from pitiable abused little girl to vengeful young woman, from that to manipulative power-seeker, and from that to full-blown megalomaniac. Her fall is not a pretty one.
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156* [=SyxxFox's=] ''Rogue Fox: Armageddon Soul'' series has the beloved titular character Fox falls into alarming depths of deep depression that manipulates his broken-heart into bitter resentment at the abandonment of his friends and the refusal of accepting his apology from Krystal after the Anglar Blitz. The result? He fakes his death and commits a crime that sends him to a clandestine government's operation called Slaying Silence aka Project Slayer, a military plan intent on creating supersoldiers out of the hardened-souls of lowlifes and thugs as a countermeasure for Corneria's safety. Ironically, the time he spent there only darkens his heart before he eventually loses it once he is sent on assassination missions, becoming cruel and cold-hearted. It worsens when Krystal crosses his path again as "Kursed" (which happens in one of Command's endings) and the clash results in him becoming more sadistic and vengeful (and hateful towards Krystal) as he eventually becomes an illegalist after defecting with his newfound lover and team. The next story "Spare Your Soul" is even darker because he ''literally'' obliterates Corneria in an act of vengeance soon afterward. And though he is defeated in the sequel, it is heavily implied by both the readers and author himself, that he will return seeking revenge once his forced servitude to repay the souls he took in his path of destruction ends, starting with Krystal and eventually his father.
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159* ''Fanfic/BeAllMySins'': Nathalie goes through an accelerated version where, as is often repeated, the corruption train has no brakes.
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162[[folder:Films -- Animation]]
163* In the ''WesternAnimation/MyLittlePonyEquestriaGirls'' spin-off universe of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', [[SignificantGreenEyedRedhead Sunset]] [[APupilOfMineUntilSheTurnedToEvil Shimmer's]] pictures of herself as Princess of the Fall Formal show her progressing from "genuine and innocent" to "condescending and entitled" to "outright power-hungry".
164[[/folder]]
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166[[folder:Films -- Live-Action]]
167
168* Andrew Detmer from ''Film/{{Chronicle}}'', although in his case it'd be more of [[TheDogBitesBack him not willing to be a whipping boy]] [[KickTheDog to those who have constantly abused him]]. He starts the movie with an abusive father and a terminally ill mother, then he gains telekinetic powers through an alien device. Andrew becomes something of a [[TheSocialDarwinist Social Darwinist]] and uses increasingly destructive means to lash out against his bullies and provide for his mother until he finally snaps and becomes an insane OmnicidalManiac who lays waste to Seattle.
169* Charles Foster Kane in ''Film/CitizenKane'' goes from being a muckraking journalist to a megalomaniacal narcissist who's only interested in running his newspaper empire.
170* Harvey Dent in ''Film/TheDarkKnight''. As he says himself, a hero could end up living long enough to see himself becoming a villain, {{foreshadow|ing}}s his own future and he ends up having this as his character theme, with crucial mistakes, tragedy and the Joker's manipulations ultimately leading to him becoming Two-Face.
171* Assumed within the plot of ''Film/DraculaUntold'', with Vlad III calling himself Son of the Dragon, and eventually calling himself Son of the Devil by the end. [[spoiler:However, it's also a SubvertedTrope, as he gains a lot of humanity over the course of the film, to the point of seeing his past massacres as the Impaler as disturbing, and killing his entire vampire army so as to protect his son.]]
172* ''Film/EmilyTheCriminal'': Emily starts as a law-abiding person suffering the consequences of prior bad decisions. By the end of the movie she is a serious felon and appears much darker morally.
173* The SpaghettiWestern ''Film/FacciaAFaccia'' has a mild-mannered Boston professor turn into a ruthless criminal over the course of the film.
174* ''Film/FallingDown'': An interesting version where not only does the protagonist Bill Foster aka D-Fens become "the bad guy", but the roles are also reversed with his HeroAntagonist Detective Prendergast, who initially seems like a forgettable side character. Foster starts the film by [[GoingPostal lashing out at the societal annoyances he sees around him]], but his actions become increasingly bolder as he takes an entire restaurant hostage [[RemonstratingWithAGun to complain about the bad food]], blows up a construction site, and causes several deaths. By the time that Foster and Prendergast come face to face and Foster [[HeelRealization realizes that he's the bad guy in all this]] and the DecoyProtagonist, it comes as a shock to the audience who were identifying with Bill up until then.
175* Arguably the case for Abigail in ''Film/TheFavourite'', as she starts out a kind-natured FallenPrincess, who was previously a Lady before her father gambled away all the family fortune, including Abigail herself, so she sets out to join her cousin Sarah at Queen Anne's court in hopes of getting it back. However, as she is sucked into the world of politics and is abused consistently by the staff, Sarah and the Duke, Abigail adapts to their cruel, underhanded ways alarmingly quickly, going from playing nice around Queen Anne as an antidote to Sarah's personality, faking tears when people push her too far, drugging Sarah's tea, seducing a Lord, marrying him and then all but dumping him once she gets her title back. Her cruelty finally culminates in [[spoiler: getting Sarah officially banished from Court and intercepting her letters to the Queen, leaving Anne heartbroken, blatantly cheating on her husband in front of him, and finally stomping on one of Queen Anne's beloved pet bunnies (whom she views as surrogate children) until she nearly kills it.]] Queen Anne is ''not amused.''
176* Seth Brundle in ''Film/TheFly1986'' starts as a sweet, brilliant scientist... then, in the midst of a drunken bender in the wake of a romantic misunderstanding, he makes a TragicMistake with his teleportation project and ends up unknowingly merged with a housefly on the molecular-genetic level. The resultant mutation is a SlowTransformation from the inside-out that not only turns him into a walking BodyHorror but slowly erodes his human morals and reason. Realizing that he's becoming "an insect who dreamt he was a man and loved it", he turns his still-devoted lover Veronica away because he ''knows'' he will hurt her at some point if he doesn't. Alas, it's only ''afterward'' that he learns she's pregnant with his child, and between this and his desperate hopes to retain ''some'' of his humanity he [[spoiler: kidnaps her before she can have an abortion, gruesomely maims the ex-lover who comes to rescue her with ''corrosive vomit'']], and '''then''' [[spoiler: tries to forcibly merge himself with her and their unborn child]], during which his final OneWingedAngel transformation takes place and he becomes a monster in every possible sense. [[spoiler: His plan fails and renders him a ClippedWingAngel, and Veronica ends up killing him at his voiceless request.]] (One reason the film was financed by a production company rather than by 20th Century Fox directly was because executives weren't sure this trope would appeal to audiences of TheEighties.)
177* ''Film/FridayThe13thPartVANewBeginning'' not only ended with [[spoiler:"Jason Voorhees" revealed to be a [[JackTheRipoff copycat killer]], it also implied that Tommy Jarvis, the protagonist of both this film and [[Film/FridayThe13thTheFinalChapter the previous one]], had been left so traumatized by his ordeal that he had snapped and become a killer himself. It culminates in a BolivianArmyEnding where he sneaks up on the FinalGirl Pam with a knife while wearing a familiar hockey mask.]] The negative fan reception to this film, however, caused the filmmakers to [[AbortedArc drop that story]] in the next film, ''[[Film/FridayThe13thPartVIJasonLives Jason Lives]]'', which revealed the ending of ''A New Beginning'' to be [[AllJustADream a hallucination]].
178* Joker in ''Film/FullMetalJacket'' is a reluctant infantryman who questions whether or not it is natural for man to kill. After killing a Vietnamese sniper who singlehandedly killed most of his platoon, he is gleefully singing with his platoon ready to kill some more.
179* The protagonist in ''Film/GateOfHell'' is a noble, brave samurai. He falls in love with a lady-in-waiting at the emperor's court and asks for her hand, only to find out she's already married. He doesn't take "no" for an answer, and by the end, he is a homicidal villain.
180* ''Film/TheGodfather'' trilogy is all about Michael Corleone's transformation from WhiteSheep of a crime family to its ruthless leader, and subsequent doomed attempts to [[TheAtoner atone]]. Initially, he's not supposed to be involved in the family business at all, as his father genuinely wants someone in the next generation to leave their criminal past behind, but Michael is drawn in in order to protect him from assassination and ends up being the only real candidate to succeed him. He starts out promising his wife that he too intends to make the family legitimate, and his justification for everything is that he's protecting his family. But it turns out he thinks the best way to do that is by consolidating his power and taking out all his enemies in one fell swoop, [[spoiler:who happen to include his brother-in-law]]. The second movie takes the paradox further -- now the enemies he's wiping out are [[spoiler:a terminally ill man who's no threat to him anyway and, famously, his own brother]], and in the meantime his coldness and the violence that surrounds him have driven his wife and children away. The third film has him as a tragic figure realizing that he can't undo what he's done and that the future of the family is out of his hands, and eventually receiving the ultimate poetic punishment: [[spoiler:seeing his daughter killed by a bullet meant for him]].
181** The subplot for ''Part II'' is a flashback detailing how Michael's father Vito started out as a poor immigrant orphan, turning to crime after being fired to feed his family, and rose to become one of the most powerful Dons in the nation.
182* ''Film/TheHand'' showcases Jon's dark descent from cartoonist and family man into madness, violence and perhaps murder (depending on whether you believe the EvilHand actually exists or is just a product of Jon's delusion).
183* The [[EpicMovie entire scope]] of ''Film/TheHumanCondition'' is this, which sees [[FallenHero Kaji]] go from an [[TheIdealist idealistic]] hero to a [[KnightInSourArmor cynical demoralized drifter.]]
184* ''Film/Joker2019'' details a version of ComicBook/TheJoker's, starting from a man who suffers from mental illness and is ostracized by society and going through his path to becoming Franchise/{{Batman}}'s archenemy.
185* If you consider her a villain rather than a feminist icon, Valerie Solanas in ''Film/IShotAndyWarhol''.
186* ''Film/IShotJesseJames'' features an odd example, as it's [[ZigzaggedTrope a villain becoming good before going bad again]]. Robert Ford starts out as just another [[{{Outlaw}} outlaw]], who then tries to go straight and get married. However, frontier society [[ReformedButRejected repeatedly shuns and shames him]] for killing UsefulNotes/JesseJames, eventually leading to his final bout of madness when his girlfriend decides to leave him.
187* ''Film/{{Leatherface}}'' is the story of how [[UsedToBeASweetKid the innocent young boy Jedidiah]] becomes [[PsychopathicManchild the childish, brutish murderer Leatherface]].
188* ''Film/LetMeIn'' has a very tragic example with the main character Owen, who starts the story off as meek boy being horribly abused by bullies at school, neglected at home, deeply lonely and showing signs of snapping from his situation. And that's before he meets the vampire, Abby. By the end of the film he's run away with her, accepting her vampiric nature completely and regardless of whether she turns him into a vampire as well, or just uses him as her caretaker, he'll be living a violent life until he dies.
189* ''Film/MeanGirls'' is a comedic take on this, exploring how a seemingly normal, sweet, and kind teenage girl like Cady Heron can transform into an AlphaBitch without even realizing it. Her quest for revenge against Regina George winds up dragging her down to Regina's level as she employs the same underhanded tactics that Regina did to ruin the lives of countless girls who crossed her, eventually culminating in a TheReasonYouSuckSpeech from her friend Janis who realized what Cady had become. The third act is about Cady's HeelRealization driving her to claw her way back from her villainy and become the protagonist again.
190* Thana from ''Film/Ms45'' begins the film as a sympathetic rape victim, but her breakdown and hatred causes her to evolve from an accidental killer, to vigilante, to serial killer and finally a mass shooter.
191* ''Film/MyBestFriendsWedding'' is a rom-com variation of this, although the film is clever enough to hide it under the usual Julia Roberts tropes for the first half of the film.
192* ''Film/PiratesOfSiliconValley'' focuses a lot on UsefulNotes/SteveJobs' transformation from a counter-culture child of TheSixties to a hard-driving BadBoss who's consumed by his ambition and drives away his friends. He gets better.
193* ''Film/TheQueenOfBlackMagic'': Over the course of the film, Murni goes from innocent woman to lynching victim to vengeful sorceress to [[spoiler:trying to slaughter the entire village before finally sacrificing herself to achieve redemption]].
194* ''Film/TheRulingClass'' is a very peculiar case as the main character, Jack Gurney is from start to finish completely insane. He starts however with the harmless delusion of [[AGodAmI being Jesus Christ]] and a loving God who wishes goodwill to everyone. Then they give him a rather nasty [[BreakThemByTalking breaking speech]] that completely shatters his emotional world and the keystones of his world view. He crosses the DespairEventHorizon and almost becomes an empty husk of a man. But then his willpower facilitates another identity from zero, in accordance with his new grim understanding of the world. And thus Jack [[spoiler: aka Jack the Ripper]] was born. [[Literature/AClockworkOrange He was cured alright...]]
195* It was originally assumed that this would be the plot of ''Film/TheScorpionKing'', as the prequel to ''Film/TheMummyReturns'', but the film ends with Mathias still the hero. The only indication that he'll eventually become a villain is a single reference at the end that his future won't necessarily be happy. WordOfGod later retconned Scorpion King in ''The Mummy Returns'' into Mathias's IdenticalGrandson.
196* ''Film/TheSocialNetwork''. It shows Mark's slide from average nerd to a possible CorruptCorporateExecutive due to one mean streak too many. [[spoiler:Around the end of the film, he realizes his mistakes, but has somewhat realized he's gone too far to fix them and tries to make some amends by friend requesting his ex-girlfriend who he insulted over the course of the film.]]
197* The ''Franchise/StarWars'' prequels as well as ''WesternAnimation/StarWarsTheCloneWars'' are pretty much Anakin Skywalker's fall from grace. The original trilogy is [[RedemptionQuest his journey towards redemption.]]
198* ''Film/{{Stoker}}'' documents [[spoiler:India Stoker's spiral from a polite and mostly harmless (if a bit creepy) teenage girl, to a murderer. This is largely thanks to her relationship with [[TheCorrupter Uncle Charlie]].]]
199* Travis in ''Film/TaxiDriver'' is a more ambiguous case. He starts out alienated, and then by the end [[spoiler:he attempts to assassinate a senator (though, admittedly, he fails) and kills three people, two of whom were complete strangers.]] Interestingly, because he is never tied to the former, no one else in the story actually sees him as such.
200* Washizu in ''Film/ThroneOfBlood''. Since the film is based on ''Theatre/{{Macbeth}}'', this is not a surprise.
201* Fred C. Dobbs in ''Film/TheTreasureOfTheSierraMadre''. He starts off as our main character, but our allegiance gradually switches to his partners as he comes down with GoldFever and eventually goes bad.
202* ''Film/XMenFirstClass'' revolves around Magneto seeking revenge for the murder of his mother and his increasing acceptance of mutant supremacy. He also persuades Charles' foster sister Raven (aka ComicBook/{{Mystique}}) to follow along with him so she can be accepted.
203* Remus in the Italian movie ''Film/IlPrimoRe''. At the start, he and Romulus are just two shepherds who love each other. Then [[spoiler:a flood of the Tiber kills their flock and leaves them to be captured by the Albani to be sacrificed, and during their escape with other perspective victims he becomes progressively crueler, before snapping and turning to murder and burning down the village he had tried to settle in when the Vestal kidnapped from Alba prophetizes that the one who will found an empire will kill his brother]], and at the end Romulus ''has'' to kill him to protect the villagers, [[spoiler:[[ProphecyTwist fulfilling the prophecy in a way neither brother nor the Vestal had expected]]]].
204* In ''Film/TheWitch'', [[spoiler:Thomasin starts the film as a pious Puritan who's trying her best to help her family survive out in the wilderness. Then the plot happens -- the family is terrorized by supernatural activity, resulting in a WitchHunt where the main suspect is [[TheUnfavorite Thomasin herself]]. By the end, Thomasin's been forced to [[SelfMadeOrphan murder her own mother in self-defense]], everyone in her family is dead, and she's alone in the middle of nowhere with no food and no means to provide for herself, and winter is on its way. So she signs the Devil's book and joins the witches' coven, [[TrappedInVillainy because it's her only hope for survival]].]]
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207[[folder:Literature]]
208* ''Literature/NineteenEightyFour'' combines this with TheBadGuyWins, as [[spoiler:The Party successfully brainwashes Winston into becoming another one of their drones before killing him.]]
209* ''Literature/BreakfastOfChampions'' puts a spin on this. From the get-go, it's a ForegoneConclusion that Dwayne Hoover will become a lunatic who will savagely assault several people. However, despite providing in-verse reasons for his change from a loving, charismatic man to a violently unhinged brute, [[spoiler:it's ultimately because the author, Kurt Vonnegut made it so]].
210* The title character in Creator/StephenKing's ''Literature/{{Carrie}}'' (and its film adaptations) is a [[MisunderstoodLonerWithAHeartOfGold kind-hearted, but socially outcast teenage girl]] who spends the first half of the book getting slowly beaten down and pushed to her RageBreakingPoint by [[AllOfTheOtherReindeer her classmates]], [[AdultsAreUseless the school faculty]], and even [[AbusiveParents her own mother]]. The second half is about [[RoaringRampageOfRevenge the massacre she commits as a result]] when what happens at the Senior Prom makes her ''[[BewareTheNiceOnes snap]]''.
211* This is Geder Palliako's arc across ''The Dragon's Path'', the first volume of ''Literature/TheDaggerAndTheCoin''. Initially introduced as a bumbling, nerdy young knight from a minor noble family, the realization that he was set up to take the fall for [[TheEmpire his country's]] failed occupation of a captured city state (when taken in tandem with his {{Fatal Flaw}}s of a LackOfEmpathy when it comes to his big plans and a penchant for DisproportionateRetribution when he feels he's being mocked) drives him to his [[KillItWithFire first atrocity]], and he spends most of the rest of the book vacillating between saying IDidWhatIHadToDo and MyGodWhatHaveIDone. Then he meets a creepy cult of spider-worshippers who have decided Geder is their DarkMessiah who will lead their religion in conquering the world, and who have the [[CompellingVoice powers]] to make him believe it too. By the middle of the second book, Geder is well on his way to full EvilOverlord territory.
212* ''Literature/TheEmpiriumTrilogy'': Rielle's storyline is about her transition from being the long awaited, beloved Sun Queen to the long feared and widely hated Blood Queen, traitor of her kind.
213* ''Literature/ForestOfAThousandLanterns'': Xifeng starts the book as a good person, but gradually resorts to things like eating her court rivals' hearts to gain power, all for the purpose of eventually becoming Empress.
214* ''Gingema's Daughter'', the first book in Sergey Sukhinov's ''Emerald City'' series, is about the adventures of Corina, originally an ordinary, if somewhat lazy, girl. She starts her way as an understudy of Gingema, then runs away to travel with her wolf companion. She lives by different families, usually helping them magically in secret. But gradually, she decides that BeingGoodSucks since everybody bothers you with requests, and being feared is as important as being loved. She deceives the Woodsman to do her bidding by pretending to be the daughter of his former sweetheart and ultimately manipulates him into deposing the Scarecrow, thus becoming the ruler of Emerald city. The rulership she establishes is a CrapsaccharineWorld: there is food for free and low taxes, but cross Corina in any way and you are dead or turned into a small animal. By the second book, she kills Ellie's parents and becomes a fully-fledged villain.
215* In ''Literature/{{Gormenghast}}'', the titular castle, a massive rambling city-state, is also an oppressive social structure where people are locked into their social roles and even their occupations from the moment of birth. No social mobility is possible and nobody has ever seriously tried to challenge the system. That is, until the advent of a kitchen scullion called Steerpike, who tires of being bullied and overworked in the dungeon kitchens. Escaping from the kitchens, Steerpike literally and metaphorically makes his way up in the hierarchy - initially by physically scaling the outside of the Castle. At first, he is a romantic hero who arouses the reader's sympathy. But little by little, his ambition to rise to the very top and supplant the ruling Groan family takes over, with deceptions, manipulation, and finally murder in support of his goal. The boy hero becomes a murdering villain, slowly but surely, across the course of two books.
216* In ''Hekla's Children'', a fantasy-horror novel by James Brogden, the story starts off as protagonist Nathan Brookes investigation into the discovery of a body in a bog and his quest for redemption in an incident 10 years ago that led to the disappearance of 4 students under his supervision. Much later in the story, he's revealed to be a DecoyProtagonist and through a millennias-old TimeLoop is actually the monster that started the whole mess in the first place and then another character is revealed to be the true ChosenOne.
217* Despite the name, it appears that ''Literature/HeroesSaveTheWorld'' will be featuring at least a couple of these.
218* In Livy's ''The History of Rome'', which is a record of real events (though entirely based on legend for the earlier parts), embellished where the author felt it necessary, this is a major theme for more than a few of the kings and consuls of early Rome.
219* The ''Literature/HorusHeresy'' has done this for Horus, Fulgrim and Lorgar and Alpharius Omegon.
220* Creator/MichaelSwanwick's thematically-paired novels ''Literature/TheIronDragonsDaughter'' and ''Literature/JackFaust'' are {{Deconstructor Fleet}}s that demonstrate how SF/Fantasy genre wish-fulfillment fantasies end up turning the protagonists into {{Omnicidal Maniac}}s. The former has a female protagonist and targets LandOfFaerie and ChangelingFantasy tropes, while the latter has a male protagonist and targets hard-SF "competent man" tropes.
221* Creator/JohnAjvideLindqvist's ''Literature/LetTheRightOneIn'' and its DistantSequel ''Let the Old Dreams Die'' seems to be one for 12-year old Oskar. Even before he meets Eli, a vampire who is physically and somewhat mentally also 12, Oskar starts out obsessed with serial killers and thinks about hurting or even killing his bullies. After he meets Eli [[spoiler:he has no problem when she ''does'' kill the bullies]]. By the time of ''Let the Old Dreams Die'', over 20 years later, [[spoiler: Oskar is also a 12-year old vampire alongside his now-girlfriend Eli, and it’s strongly implied the pair have no issue with hunting innocent families]].
222* ''Literature/TheLightbringerSeries'' does this with Liv, and also provides a fitting quote for this trope itself: "Idealists mature badly; they either become idiots or hypocrites."
223* ''Literature/MagicalGirlRaisingProject'': Both the ACES and the QUEENS arcs are this for Princess Deluge, leading her into becoming the new BigBad.
224* In the ''Literature/{{Mistborn}}'' trilogy by Creator/BrandonSanderson, this is the supposed backstory. A thousand years ago a champion, the 'Hero of Ages' rose up to defeat an (unspecified) evil known only as 'The Deepness' but upon his victory, he took possession of the world as its Lord Ruler.
225-->"For a thousand years the ash fell and no flowers bloomed. For a thousand years, the Skaa slaved in misery and lived in fear. For a thousand years the Lord Ruler, the "Sliver of Infinity", reigned with absolute power and ultimate terror, divinely invincible."
226** The heroes of this story find an old logbook written by the man who would become the Lord Ruler which shows how he began his quest as a humble, earnest man trying to save the world. In the end, the truth becomes far more complicated as the Lord Ruler's motivations are slowly revealed throughout the trilogy. The short version is that [[spoiler: the hero, Alendi, was duped by prophecies being altered by Ruin, an OmnicidalManiac deity trapped in the Well of Ascension who would be released if the hero reached the Well and "released" the power. When the scholar who originally prophesized the hero learned the truth, he had his allies pose as guides and murder Alendi when he reached the Well. Then one of the guides named Rashek took the power in the Well and kept it, keeping Ruin trapped and becoming the Lord Ruler. He was driven insane over time by Ruin, becoming a WellIntentionedExtremist EvilOverlord]].
227* The story of Satoru Suzuki/Ainz Ooal Gown in ''Literature/Overlord2012'' is essentially a transformation from a NormalFishInATinyPond accidentally having a NewLifeInAnotherWorldBonus who just wanted to find his other friends in the world he's transported to as well as saving an innocent village from eradication, to an [[spoiler:EvilOverlord who plots to TakeOverTheWorld using his superior power and his loyal subordinates, causing conflicts in various nations and [[EngineeredHeroics then stepping in to solve it himself]], as well as ordering atrocities far worse than he stopped earlier.]]
228* This is the plot of the first three novels of ''Literature/TheReynardCycle''. Reynard begins the series as a LoveableRogue. By the end of the third novel, he has morphed into the BigBad. And he [[LoveMakesYouEvil did it all for love.]]
229* In ''Literature/PleaseDontTellMyParentsImASupervillain'', Penelope and the rest of the Inscrutable Machine start relatively idealistic and well-meaning, only being labeled as villains for a couple mistakes and some misunderstandings. Their adventures gradually grow darker, culminating in their final attempt to become heroes backfiring and at least Penelope deciding to embrace her role as a villain.
230* ''Literature/ShakuganNoShana'': [[spoiler:Yuuji Sakai]] goes down this road because [[spoiler:he's sharing a body with the [[BigBad Snake of the Festival]] inside Reiji Maigo]]. However, in the end, [[spoiler:this trope is downplayed in the final light novel. While incredibly ruthless, Snake of the Festival Yuji ultimately turns out to be a WellIntentionedExtremist, [[TheBadGuyWins permanently saving the day]] by ending the ForeverWar and [[TheExtremistWasRight providing a world for Crimson Denizens to exist without devouring humans' Power of Existence, furthermore allowing the Flame Haze to finally lay aside their weapons]]]].
231* Yarvi starts out ''Literature/TheShatteredSea'' as a teen GuileHero who while somewhat more ruthless than your unusual YA protagonist of this type, is still a good guy. After he loses a POV in the second book, he comes off as a more sinister figure and enacts some morally questionable plans, but since they work out for the best, he seems like he still might be the same old Yarvi. However, by the end of the third book, Yarvi is more or less the BigBad and is a ruthless schemer worse than those he opposes, and is willing to sacrifice his loved ones and everyone else to satisfy his obsession with revenge and self-validation.
232* ''Literature/TheShining''. It starts off with Jack being a happy family man, albeit with a dark past, until the influence of the hotel drives him to madness and monstrosity.
233* Fëanor's whole arc in ''Literature/TheSilmarillion'' is his descent from hero to AntiHero to psychotic, obsessive VillainProtagonist.
234* The ''ComicBook/TransformersTransTech'' story "I, Lowtech" is the first-person perspective story of a CorruptCorporateExecutive trying to figure out why he seems to [[GrandTheftMe no longer be in his real body]]. While he was not exactly ''good'' to start off with, he ''was'' (technically) law-abiding and never caused direct harm. Until a combo of his first violent act done in self-defense and nobody taking his claims of a body swap seriously makes him realize EvilFeelsGood[=/=]EvilIsEasy and causes him to start going insane and degenerating into a rampaging serial killer who kills just because it's convenient/for revenge.
235* ''Literature/TheWalkingDeadRiseOfTheGovernor'' deals with how Philip Blake/The Governor became what he is. Needless to say, it isn't what you were probably expecting.
236* ''Well of Darkness'', first book of ''Literature/TheSovereignStone'' Trilogy, provides the origin story for [[EvilOverlord Dagnarus]], his lover [[DarkActionGirl Lady]] [[LoveMakesYouEvil Valura]], and his [[TheDragon Dragon]] Shakur (though admittedly, Shakur was pretty evil even ''before'' he met Dagnarus). The subsequent two books deal with them as main villains.
237* Ultimately inverted in ''Literature/TheWheelOfTime''. After acknowledging that he is, in fact, prophesied Dragon Reborn, Rand al’Thor is trying to be a [[ReasonableAuthorityFigure fair and benevolent ruler]]. However, nobles are scheming behind his back, Andor doesn’t recognize him as legitimate regent, White Tower kidnaps and tortures him instead of providing support, and so on. So, Rand, battling with stress coming from great responsibilities, increasing paranoia and growing insanity, tries to become harder and to distance himself from loved ones. None of this helps his public image, as even loyal people start to question his authority. Finally he snaps, stops clinging to what’s left of his moral integrity and spends a whole book as stone-cold ruthless extremist, inducing primal fear in closest allies and [[FisherKing literally spoiling the world around him]]. And then he is struck by enlightening epiphany, when he is seriously considering destroying the whole world.
238* ''Literature/{{Wicked}}'' is the Wicked Witch of the West's descent into madness and evil.
239* The wolf-dog protagonist in ''Literature/TheWolvesOfParis'' began as a tragic puppy who [[InnocenceLost lost his innocent views after a month]], turning into a bloodthirsty, vicious and irredeemable dog who eats livestock and eventually human flesh for food.
240* The first nineteen or so arcs of ''Literature/{{Worm}}'' describe how Taylor went from a bullied schoolgirl with dreams of being a superhero to [[spoiler:Queen of the Brockton Bay underworld]]. That said, [[spoiler:the trope is subverted after that, when Taylor quits the Undersiders to join the Wards, believing, based on Dinah's predictions, that this is the best way to save the world. DoubleSubverted later, when speaking to another villain who has [[WellIntentionedExtremist committed atrocities in the name of saving the world]], where she says that she would take it all back if she could, as the price was too high.]] Taylor's not the only one, either. [[spoiler:Alexandria's]] Interlude shows her progress from an innocent teenager dying of cancer to one of the most powerful superheroes on Earth to an "ends justify the means" tyrant with good publicity.
241[[/folder]]
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243[[folder:Religion & Mythology]]
244* In Literature/TheBible, David goes down this path. Despite being the runt of his father's litter, David becomes God's chosen one and he replaces Saul as Israel's king. For a time, David brings prosperity to Israel, and he is renowned as a hero by basically everyone in his country. David eventually lets the power get to his head, and he indulges in every kind of pleasure he can think of. One day David spots a woman named Bathsheba taking a bath, who was the wife of an officer in his military, and he falls madly in love with her beauty. Knowing that he can't steal Uriah's wife, David conspires to put him in a risky battle, hoping that he will be killed so he can take Bathsheba for himself. David goes through a long period of guilt over the remainder of his life, suffering the death of a child with Bathsheba, losing favor with some of his royal court, and finally ending a rebellion hosted by his son Absalom who died in battle. David believes very strongly that these misfortunes were God's punishment for his sin, and he spends his old age seeking forgiveness from God. Even though David fell from grace, the Bible notes that Solomon -- the son of David and Bathsheba -- brings even greater prosperity to Israel than even his father did.
245* In Myth/NorseMythology, there are quite a few myths starring [[TricksterGod Loki]] as a GuileHero for the Aesir. Then he orchestrates the death of [[TheAce Balder]], his motives for which are open for interpretation, and confesses to the crime while giving every other god TheReasonYouSuckSpeech at a party. After that he gets rather painfully imprisoned and is destined to lead [[ZombieApocalypse the army of Helheim]] during [[TheEndOfTheWorldAsWeKnowIt Ragnarok]].
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248[[folder:Tabletop Games]]
249* ''TabletopGame/Warhammer40000'': The ''Literature/HorusHeresy'' series discusses the events that ultimately lead to Horus betraying the Emperor, such as his brush with death where the Chaos Gods appealed to his repressed ambitions.
250* ''TabletopGame/WarhammerAgeOfSigmar'': The novel "The Godeater's Son" explores this trope, as it follows the protagonist Heldenarr Fall from a peasant living in Aqshy's wastelands to a powerful Chaos Lord as he seeks revenge against the regime that's been oppressing his people.
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253[[folder:Theatre]]
254* ''Theatre/{{Ebenezer}}'' explores how Scrooge became the cold-hearted miser he is at the start of ''Literature/AChristmasCarol''.
255* ''Theatre/{{Hamilton}}'' follows Alexander Hamilton as he goes from an idealistic, eager revolutionary to a bitter, pragmatic politician who is forced to play the game and throw others under the bus in order to protect his reputation and gets what he wants. He eventually has a HeelRealization [[spoiler:following the death of his son, who was killed trying to defend his father's honor in a duel]], and is a more sympathetic character for the rest of the show.
256* One of the best examples of this would be ''Theatre/{{Macbeth}}''. He starts off as a noble person and a good guy – a hero returning from war in triumph. But ambition which was fueled by his wife and the witches leads him to murder his king and usurp his throne and turns him into a monster.
257* ''Theatre/{{Othello}}'' starts out as a noble and good, if a bit daft, leader, but Iago takes advantage of his jealousy and manages to get him to murder his own wife in cold blood.
258* ''Theatre/SweeneyToddTheDemonBarberOfFleetStreet''. A barber framed and transported for life for a crime he did not commit by a corrupt judge who wanted his beautiful wife for himself. He returns to London, finds out what happened to his wife and daughter in the meantime [[spoiler:(though he turns out to have been lied to about the former by Mrs. Lovett, who led him to believe that his wife was dead because she wanted him for herself)]], and seeks revenge against the judge, leaving a trail of blood and death of innocents in his wake that would ultimately lead to him becoming the infamous Demon Barber of Fleet Street.
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261[[folder:Visual Novels]]
262* ''Euphoria'': While our protagonist Keisuke Takato already starts off rather morally ambiguous with his [[{{Sadist}} extremely unhealthy sexual deviancy]], he at the very least [[ReluctantPsycho has enough of a conscience]] to try and keep said deviancy under wraps until the DeadlyGame forces his hand. Going through with the [[EarnYourBadEnding "Brute End"]], however, quickly has him lose all sense of shame to fully indulge in his sadistic desires, to the point that by the end of it [[spoiler:he [[CruelAndUnusualDeath brutally murders]] one of the girls and condemns the others to a FateWorseThanDeath]].
263* ''VisualNovel/RagingLoop'': Protagonist Haruaki Fusaishi is forced to repeatedly participate in a week-long game of werewolf in order to get out of GroundhogDayLoop, and gets increasingly darker as the game loops and repeats. [[spoiler:The first time around, he's only a bystander who cannot directly get involved in the game, therefore making him responsible neither for killing villagers nor lyncing suspected wolves. In the second game, Haruaki is a villager and is forced to take several morally objectionable acts to flush out the wolves, which includes sending innocent people to the gallows to keep his ObfuscatingStupidity. In the third game, he's forced to become a wolf, and personally kills several of the people he's come to know over the course of the last two loops to finally end the loop. 'Luckily' the latter loop [[TheBadGuyWins leads to the victory of]] [[TheManBehindTheMan the real villain behind the loops]], forcing Haruaki to loop back for a final attempt and SetRightWhatOnceWentWrong.]]
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266[[folder:Webcomics]]
267* Pretty much the entire point of ''Webcomic/ErrantStory'', as Ian Samael ... ''changes'' over the ten-year run of the comic.
268** The other person on the receiving end of the same power-up actually went the other way, from a fairly antisocial and useless character to an active force for good. So the story is at least heavily implying that it was, in fact, Ian's own inability to deal with his issues that screwed everyone.
269* In ''Webcomic/ElGoonishShive'', based on what Pandora [[https://www.egscomics.com/comic/2017-07-05 tells]] him, Tedd [[https://www.egscomics.com/comic/2017-07-07 thinks]] that without his friends he might have taken the same path as Lord Tedd, one of his AlternateUniverse counterparts who turned evil.
270* Schtein's arc in ''Webcomic/StringTheory2009''.
271* The protagonist of ''Webcomic/ZebraGirl'' [[FaceHeelTurn slowly goes insane]] following her transformation into a demon. Her drive to become human again [[StagesOfMonsterGrief slowly fades away]] the longer she remains in that form.
272** She finally DOES become human again when she betrays her friends, but it comes at the cost of being banished to an alternate dimension. At the resolution of the plot arc, she's seen to embrace [[ChaoticGood her semi-former humanity AND her demonic essence]], regaining her demonic form and abilities while rekindling her human compassion.
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275[[folder:Web Original]]
276* PlayedForLaughs in Creator/AllisonPregler's reviews of ''Series/Charmed1998,'' due to the protagonists' {{Designated Hero}}ism and her own {{Alternate Character Interpretation}}s.
277-->"I just got it. This show was actually playing us the whole time! The villains were the heroes, and the heroes were the villains! This was all leading to an [[Franchise/StarWars Anakin Skywalker]] moment! We're presented with protagonists with massive power, destined for greatness, and the potential for immense good. However, slowly but surely, we're watching their downfall, leading up to the creation of three Darth Vaders. Out of the most unlikely circumstances, their own protege and her sister, [[RaisedByOrcs raised by evil]], must rise up and save the world. I should have seen it coming. Goodness gracious, ''Charmed,'' you MagnificentBastard! You played me for a fool, but you were pulling the strings all along!\
278"Or maybe this show is just [[PrecisionFStrike fucking]] moronic, you choose."
279* Both protagonists of ''WebVideo/ArbyNTheChief'' make this journey in Season 7. After spending most of the season isolated in real life from everyone except each other, having to grapple with their own mortality and crumbling bodies, and being repeatedly subjected to the douchebaggery of other players on ''VideoGame/HaloReach'', [[TheDitz Chief]] and eventually [[OnlySaneMan Arbiter]] both fall under [[TheBully Eugene]]'s sway and join him in his Fragban spree across the network.
280* ''WebVideo/DoctorHorriblesSingAlongBlog'' serves this purpose for the title character. Although it's more of an [[IneffectualSympatheticVillain Ineffectual Sympathetic Villain Protagonist's]] Journey To [[NotSoHarmlessVillain Not So Harmless]] TragicVillain.
281* [[WebVideo/SovietWomble Soviet Womble's]] ''Random Arma 3 Bullshittery Part 9'' is this, telling the story of a resistance group[[note]]Either called the Badgers or M.I.L.F.[[/note]] fighting against the Russians, and slowly becoming more and more evil. Especially noticeable with Soviet, who acts as the most consistent TokenGoodTeammate throughout the whole thing, believing that they should be fighting for freedom and democracy, and is horrified by the some of the stuff his fellow players do, but by the end he's so worn down that [[spoiler: he joins in using civilians as [[HumanShield human shields]] during an attack on the Russian base]].
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284[[folder:Western Animation]]
285* The core of ''WesternAnimation/{{Arcane}}'' is the story of how a fairly innocent child named Powder turned into the [[CuteButPsycho psychotic]] [[BombThrowingAnarchist anarchist]] [[MeaningfulRename Jinx]].
286* ''WesternAnimation/DuckTales2017'': Enforced and overseen by Black Heron. [[Characters/DuckTales2017BradfordBuzzard Bradford Buzzard]] had a noble goal in mind when he presented his plan to Ludwig von Drake as a young man, even though he failed to recognize the villainous nature of his suggested method. From the moment Heron allied with him, she began strong-arming him into making concessions towards evil, with adding the F to F.O.W.L. being the first example. Bradford was ultimately responsible for his own choices, but Heron was dead-set on making a villain out of him -- and succeeded beyond her wildest expectations, to the point even she feared his wrath during their final years together.
287* ''WesternAnimation/InfinityTrain'' Cult of the Conductor, follows Cracked Reflection's minor antagonists Grace and Simon of the Apex, introduced as passengers who rampage through the train and terrorize the inhabitants. As they find themselves separated from their followers and travel across the train to find them, they learn certain truths that begin to affect their worldview. Simon starts off as the more sympathetic of the two due to his abandonment issues, only for him to get worse mostly thanks to Grace's ToxicFriendInfluence enabling his hatred for the train's denizens to the point where he projects his anger for his former companion at the accompanying Tuba by murdering her. And when confronted with the truth about their cult's conductor, Simon is unable to accept it even when Grace outright admits her lies to him. In response, he doubles down on the cult's beliefs and changes it for the worse, at the cost of his sanity and tragically ends up DyingAlone.
288* ''WesternAnimation/StarWarsTheCloneWars'' served as an expansion on the circumstances that led to [[Characters/StarWarsAnakinSkywalker Anakin Skywalker]] [[TheParagonAlwaysRebels becoming]] [[Characters/StarWarsDarthVaderAndServants Darth Vader]], with his turn to TheDarkSide explored in a much fuller degree and allowing for his CharacterDevelopment to properly blossom. [[spoiler:Its final scene is of Vader presumably reflecting on it.]]
289* In episode 4 of ''WesternAnimation/WhatIf2021'', it presents an AlternateUniverse where [[Characters/MCUDoctorStrange Doctor Stephen Strange]] lost his girlfriend Christine Palmer instead of the use of his hands in the fateful car crash that would lead to him becoming Doctor Strange. In his grief, he has spent centuries absorbing mystic beings to gain enough power to reverse the Absolute Point regarding Christie's death. In the end, he kills his [[EvilCounterpart Good Counterpart]] and succeeds in overcoming the absolute point, only for Christine to end up not being alive again for more than a few moments... [[RealityBreakingParadox Because Christine Palmer's death in this timeline was supposed to kick off the events that lead to Doctor Strange becoming the sorcerer he is now, Strange Supreme's success in undoing the Absolute Point regarding her death ends up destroying the universe he once vowed to protect.]]
290* The short-lived cartoon ''WesternAnimation/WhateverHappenedToRobotJones'' would have been one of these if it hadn't been canceled so early. It was supposed to end with the titular protagonist leading a robot rebellion to wipe out humanity.
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