History BecomingTheMask / FanWorks

* ''Fanfic/{{Ripples}}'': Will Vandam becomes TrappedInThePast of Meridian, as well as de-aged; however, she's convinved the whole thing is a LotusEaterMachine as part of some convoluted plot of Phobos. She plays along, taking the name Van Rivers, eventually becoming the friend and confidant of the child-version of Prince Phobos. By the time she realizes it ''isn't'' an illusion, and that she's really trapped in this new timeline forever, she's spent so long as "Van Rivers", and become so distanced from "Will Vandam" that she finds it easier to embrace that identity, partially as a way to cope. By the time the story catches up to canon, Van is considered one of Phobos' CoDragons and a MadScientist.

* ''Fanfic/{{Ripples}}'': Will Vandam becomes TrappedInThePast of Meridian, as well as de-aged; however, she's convinved the whole thing is a LotusEaterMachine as part of some convoluted plot of Phobos. She plays along, taking the name Van Rivers, eventually becoming the friend and confidant of the child-version of Prince Phobos. By the time she realizes it ''isn't'' an illusion, and that she's really trapped in this new timeline forever, she's spent so long as "Van Rivers", and become so distanced from "Will Vandam" that she finds it easier to embrace that identity, partially as a way to cope.

[[AC:''WesternAnimation/TeenTitans'']]
* This trope is a major part of ''[[http://www.fanfiction.net/s/3051670/1/Avatar Avatar]]''. As far as Robin's concerned, when the mask goes on he ''is'' Robin - Tim Drake (unusually for a ''Teen Titans'' fic, Robin is the Tim Drake version rather than the Dick Grayson one) doesn't exist. He deliberately wears the mask at all times, even when hanging out with the other Titans, because he considers leading the Titans a 24/7/365 job, so decided to simply stop being Tim, who he feels doesn't have what it takes to be a hero.

* In ''[[https://archiveofourown.org/works/35990902/chapters/89720398 Where There's Smoke There's... A Smoker?]]'', Marinette blurts out to Adrien that she is smoking to explain why she was in an alleyway alone instead of powering down from Ladybug. She even getting actual cigarettes to cover her claim. By the end of the story, she admits that she had become addicted to smoking as it helps relieve stress from being the new Guardian and Ladybug.

* ''Fanfic/EquestriaGirlsAFairlyOddFriendship'': While she starts out just wanting to keep an eye on Timmy (to be fair, she was generally nice and wanted to help him), Sunset gradually becomes a loving sister figure to him.

** [[spoiler:Flash]] started out as only pretending to have a crush on pony Twilight so she would let her guard down so he could find out more about her. Nowadays, however, he feels the crush isn't nearly as fake anymore...
** This happened to Soul Reaper Discord in the backstory. [[spoiler:As the project head of [=XCution=], he was supposed to be researching and testing the Humane Five's mothers under the guise of being a helpful soul training their powers.]] Overtime, his contact with them made the mask become genuine, and he went from using them to doing his damnedest to try and help them. His failure to do that still weighs heavily as one of his biggest failures.
** [[spoiler:Adagio's]] BenevolentBoss treatment of her minions, particularly outside of her inncer circle, was at least partially PragmaticVillainy, but it seems that over time she's come to start genuinely caring for them.

* In the short comic ''[[https://www.canterlotcomics.com/chap/en/becoming_the_facade/becoming_the_facade-3665 Becoming The Facade]]'', by Creator/RatedRPonyStar, two changelings kill and assume the lives of two royal guards, one of whom has a family; the assigned changeling [[{{HeelFaceTurn}} develops genuine feelings.]] Unfortunately, [[spoiler: he successfully procreates with his "wife"; before he can come to terms, he comes across his partner's [[{{HerocBSOD}} grisly slaughter of the family]], in an attempt to {{Maintain the Lie}}. [[{{This Is Unforgivable}} Enraged,]] [[{{Pun}} the changed changeling]] [[{{Slashed Throat}} kills]] [[{{Pay Evil unto Evil}} him without a second thought.]], whilst shouting [[{{Pre-Mortem One-Liner}} "Bastard!"]].]]

* In the short comic ''[[https://www.canterlotcomics.com/chap/en/becoming_the_facade/becoming_the_facade-3665 Becoming The Facade]]'', by Creator/RatedRPonyStar, two changelings kill and assume the lives of two royal guards, one of whom has a family; the assigned changeling [[{{HeelFaceTurn}} develops genuine feelings.]] Unfortunately, [[spoiler: he successfully procreates with his "wife"; before he can come to terms, he comes across his partner's [[{{HerocBSoD}} grisly slaughter of the family]], in an attempt to {{Maintain the Lie}}. [[{{This Is Unforgivable}} Enraged,]] [[{{Pun}} the changed changeling]] [[{{Slashed Throat}} kills]] [[{{Pay Evil unto Evil}} him without a second thought.]], whilst shouting [[{{Pre-Mortem One-Liner}} "Bastard!"]].]]

* In the short comic ''[[https://www.canterlotcomics.com/chap/en/becoming_the_facade/becoming_the_facade-3665 Becoming The Facade]]'', by Creator/RatedRPonyStar, two changelings kill and assume the lives of two royal guards, one of whom has a family; the assigned changeling [[{{HeelFaceTurn}} develops genuine feelings.]] Unfortunately, [[spoiler: he successfully procreates with his "wife"; before he can come to terms, he comes across his partner's grisly slaughter of the family, in an attempt to {{Maintain the Lie}}. [[{{This Is Unforgivable}} Enraged,]] [[{{Pun}} the changed changeling]] [[{{Slashed Throat}} kills]] [[{{Pay Evil unto Evil}} him without a second thought.]], whilst shouting [[{{Pre-Mortem One-Liner}} "Bastard!"]].]]

* In the short comic ''[[https://www.canterlotcomics.com/chap/en/becoming_the_facade/becoming_the_facade-3665 Becoming The Facade]]'', by Creator/RatedRPonyStar, two changelings kill and assume the lives of two royal guards. One of the guards has a family, and the assigned changeling develops genuine attachments. Unfortunately, [[spoiler: he successfully procreates with his "wife"; before he can come to terms, he comes across his partner's grisly slaughter of the family, an attempt to {{Maintain the Lie}}. [[{{This Is Unforgivable}} Enraged,]] [[{{Pun}} the changed changeling]] [[{{Slashed Throat}} kills]] [[{{Pay Evil unto Evil}} him without a second thought.]], whilst shouting [[{{Pre-Mortem One-Liner}} "Bastard!"]]. A Heel-Face Turn is implied, as he attends the funeral.]]

* In the short comic ''[[https://www.canterlotcomics.com/chap/en/becoming_the_facade/becoming_the_facade-3665/ Becoming The Facade]]'', by Creator/RatedRPonyStar, two changelings kill and assume the lives of two royal guards. One of the guards has a family, and the assigned changeling develops genuine attachments. Unfortunately, [[spoiler: he successfully procreates with his "wife"; his partner slaughters the family, to hide their masquerade, before he can bring himself to act on his newfound love. The [[{{Pun}} changed changeling]] kills his companion in rage upon discovering the grisly scene. A Heel-Face Turn is implied, as he attends the funeral.]]

* In the short comic ''[[https://www.canterlotcomics.com/chap/en/becoming_the_facade/becoming_the_facade-3665/ Becoming The Facade]]'', by Creator/RatedRPonyStar, two changelings kill and assume the lives of two royal guards. One of the guards has a family, and the assigned changeling develops genuine attachments. Unfortunately, [[spoiler: he successfully procreates with his "wife"; his partner slaughters the family, to hide their masquerade, before he can bring himself to act on his newfound love. The {{Pun changed changing}} kills his companion in a Berserk Button moment, upon discovering the grisly scene. A Heel-Face Turn is implied, as he attends the funeral.]]

* In the short comic ''[[https://www.canterlotcomics.com/chap/en/becoming_the_facade/becoming_the_facade-3665/ Becoming The Facade]]'', by Creator/RatedRPonyStar, two changelings kill and assume the lives of two royal guards. One of the guards has a family, and the assigned changeling develops genuine attachments. Unfortunately, [[spoiler: he successfully procreates with his "wife"; his partner slaughters the family before he can bring himself to act on his newfound love. The {{Pun changed changing}} kills his companion in Berserk Button moment, upon discovering the grisly scene. A Heel-Face Turn is implied, as he attends the funeral.]]

* In * the short comic[[https://www.canterlotcomics.com/chap/en/becoming_the_facade/becoming_the_facade-3665/ Becoming The Facade]], by '''Creator/RatedRPonyStar'', two changelings stealthily take out and assume the lives as two royal guards. One of the guards has a family, and the changeling develops a genuine attachment. Unfortunately, [[spoiler: he successfully procreates with his "wife", and the other changeling slaughters the family before he can do anything to act on his newfound love. The [[Pun changed changing]] kills his companion. He is implied to have reveled himself in a [[HeelFaceTurn]] as he attends the funeral.]]

* In * the short comic[[https://www.canterlotcomics.com/chap/en/becoming_the_facade/becoming_the_facade-3665/ Becoming The Facade]], by '''Creator/RatedRPonyStar'', two changelings stealthily take out and assume the lives as two royal guards. One of the guards has a family, and the changeling develops a genuine attachment. Unfortunately, [[spoiler: he successfully procreates with his "wife", and the other changeling slaughters the family before he can do anything to act on his newfound love. The changed changling{{Pun}} kills his companion. He is implied to have reveled himself in a [[HeelFaceTurn]] as he attends the funeral.

* After being declared leader of the "Villain" side of the exercise in ''FanFic/HeroClassCivilWarfare'', Izuku spends an entire weekend pouring over movies where the villain is a main character (including ''Film/TheGodfather'', ''Film/TheDarkKnight'', ''Film/OceansEleven'', and the ''entire'' Franchise/MarvelCinematicUniverse) to create the perfect villain persona as "Kingpin." He then spends the rest of his prep time helping his teammates do the same. While it goes a long way towards helping them win, the observing teachers become concerned they're getting a little ''too'' into character after [[spoiler:the Villain Team '''blows up a building''']]. [[spoiler:It turns out Izuku predicted this possibility, and recruited Shinsou specifically to act as a MoralityChain should he start to get LostInCharacter.]]

People BecomingTheMask in fan works.

* Explored in the ''Franchise/MassEffect''[=/=]''Series/TerminatorTheSarahConnorChronicles'' crossover ''[[http://www.fanfiction.net/s/6338566/1/Drift Drift]]'', where [[RobotGirl Cameron]] has spent a couple hundred years carefully developing an entire personality construct based on her "Allison" memories, effectively becoming an otherwise indistinguishable human. It turns out that Cameron has apparently been using the Allison persona for so long that elements of her have influenced other parts of her "brain," like her combat programs - which she finds quite troubling, because she is apparently unable to actually do physical maintenance on her processors.

* In ''Fanfic/TruthAndRevelations'', Daniel has become so used to his new identity that he even asks his old friends, such as Hermione and Hagrid, to start calling him Daniel rather than “Harry”. The transition is ‘aided’ by the FakeMemories he included of Daniel Jackson’s past, including the death of Daniel’s parents, who Daniel essentially considers his ‘real’ parents as he has literally no memories of James and Lily to be properly attached to them.

* In the series [[https://tvtropes.org/pmwiki/pmwiki.php/Fanfic/Heirverse Heirverse]] this is pretty much how Gin and Aizen get together. YMMV though as this could just as easily be a case of BeneathTheMask and some of Kyouka's comment would imply that.

* In ''Fanfic/ResurrectedMemories'': Ember starts up the whole “Amberline” charade in order to get close to Danny in order to destroy him, the first part of the plan works so well that she [[spoiler: ends up falling in love with him and gives up [[HeelFaceTurn all of her evil plans]], she even reaches a point where she’s willing to swear off her ghost half permanently for him.]]

[[AC:Creator/{{Disney}}]]
* In the "[[https://archiveofourown.org/series/1509638 Princess of the Isle]]" series, Audrey (''Film/{{Descendants}}'') has been maintaining a second identity as 'Addie' on the Isle of the Lost for years with the aid of her adopted grandmother, Creator/AngelinaJolie's Film/{{Maleficent}}. However, when Ben states that he won't be releasing some of the other Villain Kids from the Isle yet, Audrey briefly goes full 'Addie' when Ben and Mal decide to keep the barrier up rather than release Gil (who Audrey regards as her True Love) and other less evil villain kids.

* After being declared leader of the "Villain" side of the exercise in ''FanFic/HeroClassCivilWarfare'', Izuku spends an entire weekend pouring over movies where the villain is a main character (including ''Film/TheGodfather'', ''Film/TheDarkKnight'', ''Film/OceansEleven'', and the ''entire'' Franchise/MarvelCinematicUniverse) to create the perfect villain persona as "Kingpin." He then spends the rest of his prep time helping his teammates do the same. While it goes a long way towards helping them win, the observing teachers become concerned they're getting a little ''too'' into character after [[spoiler:the Villain Team '''blows up a building''']]. [[spoiler: It turns out Izuku predicted this possibility, and recruited Shinsou specifically to act as a MoralityChain should he start to get LostInCharacter]].

* Zigzagged in ''Fanfic/BrideOfDiscord'', where Discord has feelings for Fluttershy from the beginning, but initially tries to justify his attempts at wooing her to himself, as an attempt to manipulated her into falling in love with him, so she would be unwilling to join her friends in trying to stop him, when he finally targets the rest of Equestria. But as the story goes on, he eventually forgets about the manipulation angle and is genuinely trying to convince her to marry him for its own sake.

* In ''[[http://www.fanfiction.net/s/4446452/1/Deep_Cover Deep Cover]]'', Naruto gets sent on a mission to infiltrate the Sound village, with the idea that his behavior is so loud and obvious that nobody would suspect him hiding something. [[spoiler: He betrays Konoha and has a romantic moment with Tayuya while watching it burn. Thinking back on how he made his decision, he realizes that at some point in the past he stopped caring about Konoha and decided that Sound was his home.]]

* "[[https://www.fanfiction.net/s/3962297/1/A-Pretense-of-Romance-Mature-Version A Pretense of Romance]]" starts with Daniel offering to pretend to date Sam to encourage Jack to acknowledge his own feelings for her (Sam resigned from the Air Force in protest of a dangerous order and is thus no longer in SG-1). However, as the fake relationship unfolds, Daniel ends up falling for Sam for real, and Sam later realizes that she feels the same way. That said, when they talk about their new relationship in the final chapter, both of them reflect on past moments where they realize with hindsight they felt a certain jealousy towards the idea of someone else being interested in the other.

* This trope is a major part of ''[[http://www.fanfiction.net/s/3051670/1/Avatar Avatar]]''. As far as Robin's concerned, when the mask goes on he ''is'' Robin - Tim Drake (unusually for a ''Teen Titans'' fic, Robin is the Tim Drake version rather than the Dick Grayson one) doesn't exist. He deliberately wears the mask at all times, even when hanging out with the other Titans, because he considers leading the Titans a 24/7/365 job, so decided to simply stop being Tim, who he feels doesn't have what it takes to be a hero

* In ''[[https://archiveofourown.org/works/35990902/chapters/89720398 Where There's Smoke There's... A Smoker?]]'', Marinette blurts out to Adrien that she is smoking to explain why she was in an alleyway alone instead of powering down from Ladybug. Sheeven getting actual cigarettes to cover her claim. By the end of the story, she admits that she had become addicted to smoking as it helps relieve stress from being the new Guardian and Ladybug.

* This trope is a major part of the ''[[http://www.fanfiction.net/s/3051670/1/Avatar Avatar]]''. As far as Robin's concerned, when the mask goes on he ''is'' Robin - Tim Drake (unusually for a ''Teen Titans'' fic, Robin is the Tim Drake version rather than the Dick Grayson one) doesn't exist. He deliberately wears the mask at all times, even when hanging out with the other Titans, because he considers leading the Titans a 24/7/365 job, so decided to simply stop being Tim, who he feels doesn't have what it takes to be a hero

* Zaysen in ''[The Bucky O'Hare Web Series''. A toad spy altered to resemble a hare named [[spoiler:Renfield]], he's placed in mammal society and very quickly becomes enamored with the freedom of expression and choice it offers, at least in comparison to that of the toads. He develops close friendships with his co-workers, and even begins dating one, and gradually starts feeling guilty for secretly betraying them the whole time. Although he faces some hurdles (a big one being that he's outed and captured), he gradually assimilates more or less perfectly, and even his boyfriend doesn't entirely mind that he's a toad.

* ''Fanfic/ARabbitAmongWolves'': Jaune, through a series of freak accidents, ends up in control of a White Fang branch and branded public enemy #1. He steels himself to the task of reforming his branch, [[NominalHero if only to clear his name and convince everyone he isn't a monster]]. However, he becomes increasingly more concerned with helping to reform White Fang, as he witnesses (and experiences himself) the injustices Faunus in remnant go through.

[[AC:Unsorted]]
* Renamon is this in ''Fanfic/DigimonTrinity''. As it turns out, [[spoiler: she only partnered with Rika in the first place because Apocalymon ordered it, as he wanted to learn how to use the bond between Digimon and Tamer to strengthen the Nightmare Soldiers]]. No one anticipated that she would actually come to care for Rika.
* A literal example in ''Fanfic/WithThisRing''. In the Renegade timeline, Orange Lantern rolled with the mistaken identification of being Grayven in order to foil several Apokoliptian invasion schemes for earth by 'claiming it as his own'. However, as part of this masquerade, and also as a general PowerUp, he used a piece of Apokoliptian technology to reshape his body and soul in Grayven's image (gaining SuperStrength, SuperToughness, HealingFactor, and powerful innate magic). Since doing so, he has found himself having flashbacks to Grayven's past and is finding difficulty separating his SI past life and Grayven's in his memories.
* Zigzagged in ''Fanfic/BrideOfDiscord'', where Discord has feelings for Fluttershy from the beginning, but initially tries to justify his attempts at wooing her to himself, as an attempt to manipulated her into falling in love with him, so she would be unwilling to join her friends in trying to stop him, when he finally targets the rest of Equestria. But as the story goes on, he eventually forgets about the manipulation angle and is genuinely trying to convince her to marry him for its own sake.
* Cinder Fall in ''Fanfic/TheRWBYLoops'' zigzags this trope something fierce. Because of the way the time loops works, she decides to fake a friendly looping identity with which to socialize with the good guys whilst simultaneously indulging her villainous side in secret. The two identities both manage to grow stronger and cause more internal conflict [[spoiler:to the point where, with a little assistance from an outside force, they become [[SplitPersonality independent and unaware of each other.]] This does not end well]].

* In ''Fanfic/MyMirrorSwordAndShield'', Suzaku was a OrdinaryHighSchoolStudent turned unintentional time-traveler. Fearing how his appearance could butterfly the War of Ascencion and erase his timeline, he joins Emperor Lelouch's EvilEmpire as a knight. Suzaku puts on the facade of being a loyal obedient knight to Lelouch in order to keep track of him and make sure that Lelouch dies at the right time. When he refuses to give up Lelouch to [[LaResistance the JLF ]] despite being unarmed and surrounded in the Battle of Narita and being promised to absolved for his actions. Suzaku then realizes that he is genuinely loyal to Lelouch. Which complicates things.
* Subverted and then played straight in ''[[https://www.fanfiction.net/s/10873281/16/Snapshots-of-The-life-and-times-of-Hatake-Kakashi-Nukenin Snapshots of The life and times of Hatake Kakashi, Nukenin]]'' where Ran has been one of Konaha's top 5 longest running infiltration, after ten years in the Grass village, but when she's ordered to 'go nukenin' and get close to the titular character, she finds that she rather enjoys the freedom that being a nukenin offers
* The ''Series/StargateSG1'' fic "[[https://www.fanfiction.net/s/3962297/1/A-Pretense-of-Romance-Mature-Version A Pretense of Romance]]" starts with Daniel offering to pretend to date Sam to encourage Jack to acknowledge his own feelings for her (Sam resigned from the Air Force in protest of a dangerous order and is thus no longer in SG-1). However, as the fake relationship unfolds, Daniel ends up falling for Sam for real, and Sam later realises that she feels the same way. That said, when they talk about their new relationship in the final chapter, both of them reflect on past moments where they realise with hindsight they felt a certain jealousy towards the idea of someone else being interested in the other.
* ''Fanfic/TheConfectionaryChronicles'' explores how Gabriel has grown into his role as Loki. After acting as a pagan god for centuries, he has acquired some aspects of their behaviour and abilities, such as an awareness of the faith of his worshippers when they’re conducting prayers and rituals. The only difference between Loki and standard pagans is that he doesn’t ‘need’ faith the way other gods do, although the faith of Hermione Granger gives him a noticeable boost as she conducts rituals to his worship.

[[AC:''Franchise/Batman'']]

* In ''Fanfic/TruthAndRevelations'', Daniel has become so used to his new identity that he even asks his old friends, such as Hermione and Hagrid, to start calling him Daniel rather than “Harry”. The transition is ‘aided’ by the FakeMemories he included of Daniel Jackson’s past, including the death of Daniel’s parents, who Daniel essentially considers his ‘real’ parents as he has literally no memories of James and Lily to be properly attached to them.
* In the ''WesternAnimation/StevenUniverse'' fic ''[[http://archiveofourown.org/works/6816583 Pulse]]'', Pearl only accepted Amethyst as a teammate because Rose ordered her to. Over the millennia, Pearl's barely-hidden distrust of/apathy for Amethyst grew into real friendliness.
-->''"No, Amethyst," Pearl said quietly. "You're wonderful. We all thought you were."\\
"No, you didn't!" shouted Amethyst. "I bet you would've killed me if Rose wasn't there."\\
"I probably would have," said Pearl, "and it would've been a horrible mistake."''

* In the series [[https://tvtropes.org/pmwiki/pmwiki.php/Fanfic/Heirverse Heirverse]] this is pretty much how Gin and Aizen get together. YMMV though as this could just as easily be a case of BeneathTheMask and some of Kyouka's comment would imply that

* Zaysen in ''[[ComicBook/BuckyOHareAndTheToadWars The Bucky O'Hare Web Series]]''. A toad spy altered to resemble a hare named [[spoiler:Renfield]], he's placed in mammal society and very quickly becomes enamored with the freedom of expression and choice it offers, at least in comparison to that of the toads. He develops close friendships with his co-workers, and even begins dating one, and gradually starts feeling guilty for secretly betraying them the whole time. Although he faces some hurdles (a big one being that he's outed and captured), he gradually assimilates more or less perfectly, and even his boyfriend doesn't entirely mind that he's a toad.
* In ''Fanfic/SeanBeanSavesWesteros'', the [[RealPersonFic "real life"]] Creator/SeanBean is transported into the land of Westeros of Literature/ASongOfIceAndFire. Now living as Ned Stark, not just playing him on TV, Sean Bean has a hard time not accepting Ned's family as truly his own, especially after Sansa is rescued.
* In ''Fanfic/DumbledoresArmyAndTheYearOfDarkness'', from the perspective of Hogwarts students in 1997-8, there's no real difference between Severus Snape pretending to be evil so as not to make Voldemort suspicious, and Snape ''actually'' being evil.
* The Seraphim, the major antagonist of ''Fanfic/AngelOfTheBat'', doesn't have the prestigious lineage he claims he does, he's just so crazy he forgot what he was saying was a lie to gain followers.
* ''[[http://www.fanfiction.net/s/10879595/1/Lelouch-of-the-Rebellion-RX-Demonic-Knights Lelouch of the Rebellion RX: Demonic Knights]]'' has Lelouch abandon his apathetic schoolboy personality completely and fully become [[VillainWithGoodPublicity Zero]] before using his [[MagicalEye Geass]] on [[TheEmperor Emperor Charles]] to erase everything except for his memories of being Zero. Even after his memories are restored in Chapter Ten, Lelouch continues to believe that he is Zero whenever he is with most of the Black Knights.
* In ''[[http://www.fimfiction.net/story/38135/Who-We-Are Who We Are]]'', one of the [[WesternAnimation/MyLittlePonyFriendshipIsMagic Mane Six]] is revealed to secretly be a changeling. While it's never revealed which of them is, she's shown to be far less concerned with being outed as a changeling and more with losing her friends.
* In ''Fanfic/HarryPotterAndTheMethodsOfRationality'' we learn that one of the villains originally constructed their villainous identity simply to test their allies and provide an enemy for them to rally against, but became disillusioned when they failed to put up an effective resistance and eventually came to enjoy the role and the respect it afforded him from their fellow villains.
* ''Fanfic/ThousandShinji'': At the beginning Shinji intended to pretend that he cared about Asuka, Rei, Misato, Touji, Kensuke... in order to manipulate them. However, he quickly came to care for them and regard them as his family sincerely.

* The ''WesternAnimation/MonstersInc'' fanfiction ''Fanfic/AngelasPetMonster'' involves Randall getting adopted by a human girl. At first, he doesn't care much for her, only wanting food and warmth. However, he quickly grows to like her, which leads to his HeelFaceTurn.
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fanfic ''Fanfic/WithoutAHive'', by Phoenix_Dragon, a novice [[VoluntaryShapeshifting Changeling]] [[TheMole Infiltrator]] named Nictis is cut off from his Hive, and forced to pretend to be a (female) Pony named Meadow Song for many, many years, during which it has no contact with his own kind. As the years pass, the identity of Meadow becomes all too real, causing a slow change in Nictis's own loyalties and values.
* In ''Fanfic/DiariesOfAMadman'', Bon Bon has been away from the changeling hive and amongst ponies for so long that she's come to consider herself as a pony foremost.

* In the Bleach series [[https://tvtropes.org/pmwiki/pmwiki.php/Fanfic/Heirverse Heirverse]] this is pretty much how Gin and Aizen get together. YMMV though as this could just as easily be a case of BeneathTheMask and some of Kyouka's comment would imply that.
* Really, almost any ''Manga/{{Naruto}}'' fanfic that has the word 'mask' in the title.
** Likewise, in many Naruto fanfics where he uses [[MesACrowd Kage Bunshin]] that have to act like someone other than himself, they end up actually thinking of themselves as their adopted persona. Case in point, in ''[[https://www.fanfiction.net/s/8702285/16/The-Ninth-Sekirei-Pillar The Ninth Sekirei Pillar]]'', a pair of clones pretending to be a married couple actually start thinking of themselves as a married couple. Naruto doesn't protest their moves to prevent their dispelling since he "doesn't want memories of fucking himself".
* ''Fanfic/WhiteRain'' has Itachi Uchiha and [[OriginalCharacter Lucia van Alstyne]]; the former's motivations were only revealed long after his death, while the latter only came to realize it after being interviewed by Ibiki.
* This trope is a major part of the ''WesternAnimation/TeenTitans'' fanfic [[http://www.fanfiction.net/s/3051670/1/Avatar Avatar]]. As far as Robin's concerned, when the mask goes on he ''is'' Robin - Tim Drake (unusually for a [[WesternAnimation/TeenTitans Teen Titans]] fic, Robin is the Tim Drake version rather than the Dick Grayson one) doesn't exist. He deliberately wears the mask at all times, even when hanging out with the other Titans, because he considers leading the Titans a 24/7/365 job, so decided to simply stop being Tim, who he feels doesn't have what it takes to be a hero.

* ''Fanfic/LulusBizarreRebellion'': [[spoiler:Shirley]] started out being manipulated into the role of Zero by Lelouch as nothing more than a figurehead with powerful stand, with Lelouch literally dictating her speeches by writing on the inside of her mask with his stand. Then, when she accidentally [[spoiler:gets her father killed]] she retreats into the Zero persona to deal with it, becoming more loyal to the role than to Lelouch and developing her own planning skills.
* From the Cylons' perspective, this is what happened to Boomer in ''Fanfic/DidIMakeTheMostOfLovingYou'' (in reality, her restored memories of the future just helped her commit to the Colonials even knowing that she was a Cylon).
* ''Fanfic/QueenOfShadows'': Thanks to Shendu trying to re-write the Book of Ages, Jade Chan ends up in an alternate reality where she has replaced the queen of an empire of Shadowkhan. Trying to fufill the role so she isn't caught out, Jade unknowingly does a better job of being the queen than the ''real'' queen. Her advisors take this more as her developing into a true leader than anything suspicious.
* Explored in the ''Franchise/MassEffect''[=/=]''Series/TerminatorTheSarahConnorChronicles'' crossover ''[[http://www.fanfiction.net/s/6338566/1/Drift Drift]]'', where [[RobotGirl Cameron]] has spent a couple hundred years carefully developing an entire personality construct based on her "Allison" memories, effectively becoming an otherwise indistinguishable human. It turns out that Cameron has apparently been using the Allison persona for so long that elements of her have influenced other parts of her "brain," like her combat programs - which she finds quite troubling, because she is apparently unable to actually do physical maintenance on her processors.
* In ''[[http://www.fanfiction.net/s/4446452/1/Deep_Cover Deep Cover]]'', a Naruto fanfic. Naruto gets sent on a mission to infiltrate the Sound village, with the idea that his behavior is so loud and obvious that nobody would suspect him hiding something. [[spoiler: He betrays Konoha and has a romantic moment with Tayuya while watching it burn. Thinking back on how he made his decision, he realizes that at some point in the past he stopped caring about Konoha and decided that Sound was his home.]]