Is there an issue? Send a MessageReason:
Added example(s)
Added DiffLines:
*Manga/JojosBizarreAdventureDiamondIsUnbreakable Has the Nijimura brothers' father, who was once a normal human being, but after the death of his wife he grew into a depressed state and began abusing his sons. At one point, he met up with DIO and became his subordinate. However, because DIO didn't trusted him, he implated a flesh bud on the father which activated upon his death, transforming the father into a mindless creature who can only remember his family.
Is there an issue? Send a MessageReason:
None
Added DiffLines:
*''Anime/{{Daltanious}}'': According to Earl, Beralios was once an ordinary lion "from [[AfricaIsACountry Africa]]" until the Heliosian Emperor ordered him to be kidnapped, taken to their planet and experimented on. As a result, Beralios is now an AnimalMecha.
Is there an issue? Send a MessageReason:
None
Changed line(s) 36 (click to see context) from:
* Many (though not all) of the various monsters from ''Webcomic/OnePunchMan'' were formerly human. Humans can naturally transform into monsters if they overly indulge in obsessive behaviors (i.e. Crablante, a guy who ate too much crab meat until he eventually turned into a grotesque crab-human hybrid); or by some external methods (like drinking a mutagenic serum, or eating "monster cells" to instantly trigger a metamorphosis).
to:
* Many (though not all) of the various monsters from ''Webcomic/OnePunchMan'' were formerly human. Humans can naturally transform into monsters if they overly indulge in obsessive behaviors (i.e. Crablante, a guy who ate too much crab meat until he eventually turned into a grotesque crab-human hybrid); or by some external methods (like drinking a mutagenic serum, or eating "monster cells" to instantly trigger a metamorphosis). [[spoiler:This gets heavily deconstructed in Supreme Hero arc, where [[PragmaticHero Amai Mask]] reveals to be a monster all along, (though ironically this is meant to be a GoodAllAlong, as previously in the series he made ''very'' morally questionable choices, albeit in the name of "justice"), while still reteaning his humanity and trying to make Saitama a real hero, by wanting to finish him off when the world watches. Fortunately, Saitama doesn't want to kill him, and helps Amai hide from the public for some time. Later, it's revealed Amai Mask is able to [[{{Humanshifting}} shapeshift into other forms]], which is how he avoided from being caught by Hero Assocation and media.]]
Is there an issue? Send a MessageReason:
None
Changed line(s) 31 (click to see context) from:
* The nomu in ''Franchise/MyHeroAcademia'' are artificially created beings made from dead humans and given one or more quirks by All for One. Some are more animal-like and can’t really think for themselves, but the high-end nomu do have some independent thought. Many of the bodies are former small time criminals.
to:
* The nomu in ''Franchise/MyHeroAcademia'' are artificially created beings made from dead humans and given one or more quirks by All for One. Some are more animal-like and can’t really think for themselves, but the high-end nomu do have some independent thought. Many of the bodies are former small time criminals. criminals but there are exceptions, like Aizawa and Hizashi’s close friend who was turned into Kurogiri.
Is there an issue? Send a MessageReason:
None
Added DiffLines:
* The nomu in ''Franchise/MyHeroAcademia'' are artificially created beings made from dead humans and given one or more quirks by All for One. Some are more animal-like and can’t really think for themselves, but the high-end nomu do have some independent thought. Many of the bodies are former small time criminals.
Is there an issue? Send a MessageReason:
trope split
Changed line(s) 12 (click to see context) from:
* ''Anime/BNABrandNewAnimal'': Michiru and Nazuna were once human schoolgirls, until they both got into a car accident, and a blood transfusion mixup changed their lives, as they both got beastman blood and end up transforming into a {{tanuki}} and a {{kitsune}}, respectively.
to:
* ''Anime/BNABrandNewAnimal'': Michiru and Nazuna were once human schoolgirls, until they both got into a car accident, and a blood transfusion mixup changed their lives, as they both got beastman blood and end up transforming into a {{tanuki}} and a {{kitsune}}, [[AsianFoxSpirit kitsune]], respectively.
Is there an issue? Send a MessageReason:
None
Deleted line(s) 7,8 (click to see context) :
----
Changed line(s) 10 (click to see context) from:
* ''Manga/AssassinationClassroom'': [[spoiler: Koro-sensei was once a human assassin, before he was captured and gradually transformed into a tentacled monster.]]
to:
* ''Manga/AssassinationClassroom'': [[spoiler: Koro-sensei was once a notorious human assassin, before he was captured and gradually transformed into a tentacled monster.monster via PlayingWithSyringes.]]
Is there an issue? Send a MessageReason:
None
Changed line(s) 39 (click to see context) from:
* ''Manga/RosarioToVampire'': [[spoiler:Hokuto Kaneshiro is revealed to be this, having been human like Tsukune before being injected with Kiria's blood. His new true form is infinitely more [[EldritchAbomination horrifying]]]].
to:
* ''Manga/RosarioToVampire'': ''Manga/RosarioPlusVampire'': [[spoiler:Hokuto Kaneshiro is revealed to be this, having been human like Tsukune before being injected with Kiria's blood. His new true form is infinitely more [[EldritchAbomination horrifying]]]].
Is there an issue? Send a MessageReason:
None
* ''Manga/AssassinationClassroom'': [[spoiler: Koro-sensei was once a human assassin, before he was captured and gradually transformed into a tentacled monster.]]
Changed line(s) 26 (click to see context) from:
* ''Manga/Hellsing'': In OVA 8, it is revealed that Alucard was once Vlad the impaler.
to:
* ''Manga/Hellsing'': ''Manga/{{Hellsing}}'': In OVA 8, it is revealed that Alucard was once Vlad the impaler.Impaler.
Deleted line(s) 40 (click to see context) :
* ''Manga/AssassinationClassroom'': [[spoiler: Koro-sensei was once a human assassin, before he was captured and gradually transformed into a tentacled monster.]]
Is there an issue? Send a MessageReason:
None
Added DiffLines:
%%%
%%
%% This page has been alphabetized. Please add new examples in the correct order. Thanks!
%%
%%%
----
%%
%% This page has been alphabetized. Please add new examples in the correct order. Thanks!
%%
%%%
----
Is there an issue? Send a MessageReason:
Miscounted the members of the Godhand.
Changed line(s) 3 (click to see context) from:
* ''Manga/{{Berserk}}'': Every Apostle was once human. Humans become Apostles when a creepy little egg-like item called a Behelit comes into their possession and they hit an [[DespairEventHorizon emotional nadir]] where they will do anything to get out of their current situation. At this point, the Behelit rearranges the features scattered upon its surface into a human face and screams, which summons the three ([[spoiler:later ''[[WalkingSpoiler four]]'']]) dark gods of the God Hand, who proceed to [[DealWithTheDevil offer him or her the chance to become a Apostle in exchange for the sacrifice of those closest to them]]. It also turns out that [[spoiler: every member of the God Hand was also human, and they were created with the use of Behelits as well]]. While Apostles do sometimes retain the personalities they had when they were human, all too often they commit TranshumanTreachery, with many of them preferring to [[ImAHumanitarian dine on their former species]]. When Apostles die, they typically [[ThisWasHisTrueForm revert to their former human forms]] after their spirits are DraggedOffToHell.
to:
* ''Manga/{{Berserk}}'': Every Apostle was once human. Humans become Apostles when a creepy little egg-like item called a Behelit comes into their possession and they hit an [[DespairEventHorizon emotional nadir]] where they will do anything to get out of their current situation. At this point, the Behelit rearranges the features scattered upon its surface into a human face and screams, which summons the three four ([[spoiler:later ''[[WalkingSpoiler four]]'']]) five]]'']]) dark gods of the God Hand, who proceed to [[DealWithTheDevil offer him or her the chance to become a Apostle in exchange for the sacrifice of those closest to them]]. It also turns out that [[spoiler: every member of the God Hand was also human, and they were created with the use of Behelits as well]]. While Apostles do sometimes retain the personalities they had when they were human, all too often they commit TranshumanTreachery, with many of them preferring to [[ImAHumanitarian dine on their former species]]. When Apostles die, they typically [[ThisWasHisTrueForm revert to their former human forms]] after their spirits are DraggedOffToHell.
Is there an issue? Send a MessageReason:
None
Added DiffLines:
* In ''Manga/AhiruNoOujisama'', Mister was once a prince, but is now an ugly dog. [[spoiler: He turns back...after being a short ugly weirdo for a bit he gets back to being a bishonen.]]
* In ''Manga/AttackOnTitan'', [[spoiler: the Titans are all human. More specifically, they are all members of the Eldian people descended from the original Titan, Ymir Fritz. When exposed to a special serum made from spinal fluid, they are transformed into a mindless Titan and trapped in this state until killed or lucky enough to consume one of the Nine Titans. The Nine Titans (such as Eren) are the ''only'' Titans capable of regaining their human form and controlling their powers, while all others remain in a state once described as an "endless nightmare". Little surprise the oppressive Marleyan regime uses it as a form of execution for Eldians]].
* ''Manga/{{Berserk}}'': Every Apostle was once human. Humans become Apostles when a creepy little egg-like item called a Behelit comes into their possession and they hit an [[DespairEventHorizon emotional nadir]] where they will do anything to get out of their current situation. At this point, the Behelit rearranges the features scattered upon its surface into a human face and screams, which summons the three ([[spoiler:later ''[[WalkingSpoiler four]]'']]) dark gods of the God Hand, who proceed to [[DealWithTheDevil offer him or her the chance to become a Apostle in exchange for the sacrifice of those closest to them]]. It also turns out that [[spoiler: every member of the God Hand was also human, and they were created with the use of Behelits as well]]. While Apostles do sometimes retain the personalities they had when they were human, all too often they commit TranshumanTreachery, with many of them preferring to [[ImAHumanitarian dine on their former species]]. When Apostles die, they typically [[ThisWasHisTrueForm revert to their former human forms]] after their spirits are DraggedOffToHell.
* ''Manga/{{Bleach}}''. Every Hollow started out as a lost human soul. Eventually, it lost its heart, whether through time or the attacks of another Hollow, and became a monster, feeling nothing but the desire to murder and a hunger for souls. If they survive long enough, Hollows can "get over it" on their own (or if someone else removes their mask or uses the Hogyoku on them) and become Arrancar, who are intelligent creatures and apparently don't need to eat souls anymore (considering that they have copious amounts of regular food in Las Noches and only three or so Arrancar are ever shown any desire to eat anyone... and of those, one is a MadScientist who's turned his minions into edible medicine and another has the ability to gain the powers of anyone he eats, so they're not just eating for the sake of eating.)
* ''Anime/BNABrandNewAnimal'': Michiru and Nazuna were once human schoolgirls, until they both got into a car accident, and a blood transfusion mixup changed their lives, as they both got beastman blood and end up transforming into a {{tanuki}} and a {{kitsune}}, respectively.
* ''Manga/ChronoCrusade'' has an unusual example revealed towards the end: [[spoiler:[[HiveQueen Pandaemonium]] was once a human woman pregnant with twins. The demons kidnapped her and transformed her into the monstrous, MindRape-using queen she is -- and transformed her human children, Chrono and Aion, into demons as well.]]
* ''Manga/{{Claymore}}'': Each and every Awakened Being and, perhaps more shockingly, the Abyss Eaters. Even more shockingly, [[spoiler:the Youma]].
* ''Manga/DeliciousInDungeon'': The zombies, walking skeletons and ghouls are the re-animated corpses and ghosts of adventurers who couldn't be revived for various reasons.
* ''The Demon Prince of Momochi House'': Aoi happened to wander into the titular house as a child, only for the house to choose him as "Omamori-sama." Meaning, he becomes a [[MixAndMatchCritters N]][[{{Youkai}} ue]]. Luckily, he can shapeshift between his human and Nue forms.
* ''Manga/DGrayMan'': Akumas. Their hunters know, at least in abstract, that they contain the souls of innocent people forever tortured until the Akuma are destroyed and they're released, but only Allen has to confront the vision of them on a daily basis. As with Hollows (though in Bleach it's a different story), leveling up obscures more and more the original souls, until even Allen can't see them anymore. It also makes new souls in the process.
* ''Manga/ElfenLied'': Anna, when first introduced, is an adorable and happy, if dimwitted, young girl who loves to run. [[spoiler:Her father is disappointed with her lack of intelligence, and transforms her into an enormous, horribly mutated creature with super-intelligence and precognitive ability. She cannot support the weight of [[MyBrainIsBig her gigantic head, and]] so must remain virtually immobile in a pool. Remember how she loved to run? [[BlessedWithSuck Yeah]]. She gets better and is overjoyed when she realizes she can't do simple math.]]
* ''Manga/FairyTail'': The dragon [[spoiler:Acnologia]] and [[spoiler:Spriggan 12 member Irene Belserion]] were originally human Dragon Slayers. However, their magic eventually ran out of control and morphed their bodies into that of dragons [[spoiler:though Acnologia figured out how to retake his human form at will while Irene regained her physical human appearance thanks to Zeref, though biologically she's still a dragon]]. Turns out this is something that happens to all Dragon Slayers eventually, [[spoiler:unless they have certain antibodies to prevent it. The present-day Dragon Slayers' Dragon parents sealed themselves in their children for seven years to create those antibodies.]]
* ''Manga/FrankenFran'': This happens a ''lot'' to people who go under Fran Madaraki's scalpel, or that of her creator.
* ''Manga/FullmetalAlchemist'':
** Shou Tucker, the Sewing Life alchemist, fuses [[spoiler:his daughter Nina with her dog, Alexander. He also fused his wife with another beast a few years back, in order to gain his certification. Both chimeras are able to talk, and they both make it known they're ''not'' happy with their new existence. The one made from his wife asks to be killed and when, it isn't obliged, starves itself. The one made from Nina and Alexander is killed by Scar.]]
** This happens to [[spoiler:Tucker himself, too]], but only in the 2003 anime adaptation -- in all other versions [[spoiler:he's executed for his crimes]]. He's made into a chimera and officially listed as having been executed by the state so that he can continue his experiments for the government in secret.
** There are a number of other cases in the series. Perhaps most notable are the chimeras working for Greed and [[spoiler: Kimblee]], who were soldiers fused with animals -- though most of them retained their human forms, they're none too happy about their situation and the latter join the heroes so that they can eventually become fully human again--and the former serial killers used as guards at Laboratory 5, who were officially executed but actually had their souls bonded to suits of armor just like Alphonse. Slicer and [[spoiler: his brother]] lament their situation and, in the 2003 version, the latter actually ends up committing suicide, but the other guard, Barry, is perfectly fine with it and if anything ''prefers'' his new body to the old one.
* ''Manga/Hellsing'': In OVA 8, it is revealed that Alucard was once Vlad the impaler.
* ''Manga/InuYasha'': [[BigBad Naraku]] was once an ordinary bandit. He has [[DealWithTheDevil made a pact with a lot of]] [[PuppeteerParasite lower youkai]], and thus he has become who he is.
* ''Manga/KingOfThorn'' has the "mother monster", which is eventually revealed to have been a human ([[spoiler:Shizuku]]) who succumbed to TheVirus.
* ''Manga/MadeInAbyss'' has creatures that are known to show up occasionally in the depths, called Narehate, that are known to be the living remains of those who traveled to the Capital of the Unreturned and...well, returned. The ones encountered in the Sea of Corpses and layers above generally look completely inhuman and have no shred of sanity or capability for rational thought left. [[spoiler:The only apparent exception is the [[BeastMan rabbit girl]] Nanache. Later, more human-like Narehate are discovered in the Capital of the Unreturned, although they appear to have become Narehate through a different mechanism]].
* In ''Manga/MagiLabyrinthOfMagic'', all the Djinns were revealed to be once members of the sentient species that were freed and later allied with Solomon.
* ''Manga/MissKobayashisDragonMaid'': It's implied that Fafnir was not born as a dragon but instead transformed into one, [[Myth/NorseMythology much like his mythological counterpart]].
* ''Manga/{{Naruto}}'':
** The [[spoiler:thousands of Zetsu clones]] were victims of the first [[LotusEaterMachine Infinite Tsukiyomi]] rather than [[spoiler:clones of Hashirama]]. The end goal of [[spoiler:Kaguya]] is to create an army using the same technique.
** The Juubi was created when [[spoiler:Kaguya merged herself into the God-Tree]].
* ''Manga/OnePiece'' has the island of [[spoiler:Dressrosa. Their humans and living toys live together. Except unlike other fantastic beings in One Piece, these "toys" were once humans but turned into toy creatures]] by a Devil Fruit user.
* Many (though not all) of the various monsters from ''Webcomic/OnePunchMan'' were formerly human. Humans can naturally transform into monsters if they overly indulge in obsessive behaviors (i.e. Crablante, a guy who ate too much crab meat until he eventually turned into a grotesque crab-human hybrid); or by some external methods (like drinking a mutagenic serum, or eating "monster cells" to instantly trigger a metamorphosis).
* In ''Anime/PuellaMagiMadokaMagica'', it turns out that [[spoiler:every single [[EldritchAbomination Witch]] that the magical girls fight (those that aren't ex-familiars, anyway) was once a magical girl herself]], and to make things even worse, [[spoiler:every magical girl is ultimately doomed to [[AndThenJohnWasAZombie become one of the very monsters she's been fighting]], unless she dies first.]]
* ''Manga/RosarioToVampire'': [[spoiler:Hokuto Kaneshiro is revealed to be this, having been human like Tsukune before being injected with Kiria's blood. His new true form is infinitely more [[EldritchAbomination horrifying]]]].
** Over the course of the series, [[spoiler:Tsukune]] also undergoes a series of translations that make him less human and more monster, but under more controlled circumstances. [[spoiler:He learns to control each of them and thus even after becoming fully vampire his mind is unchanged from when he was human. And when not actively using his powers he still looks human, other than being [[{{Bishonen}} better looking]] than he used to be.]]
* ''Manga/AssassinationClassroom'': [[spoiler: Koro-sensei was once a human assassin, before he was captured and gradually transformed into a tentacled monster.]]
* ''Anime/SailorMoon'': Many of the monsters were originally human. Some of the Youma in the first season and the Phage of the last season. Sailor Moon's power to restore the Phage to normal actually shocks the Starlights, as they had to simply destroy them because they lacked the power to do so without their princess. A single human-based Daimon also appeared in a flashback which was closer to their [[Manga/SailorMoon manga]] version. The lemures were also either human or human-like aliens before their queen stole their dreams. Then they got weird. And the Witches Five were, essentially, humans possessed by Daimon Seeds. Also inverted, where a few enemies like the Great Youma were monsters born into human form.
%%* ''Manga/{{Saiyuki}}'': Hakkai, even though he's not terribly monstrous or ''in''human now, even in his demon form, and only really has to avoid it because the minus wave currently makes demons AxCrazy.%%So how *is* he an example, exactly?
* ''Manga/SeraphOfTheEnd'': Vampires were once humans themselves.
* ''Manga/WorldEmbryo'': The enemy virus, Kanshu, were once humans who lost their memories and transformed into hideous beings upon listening to the infected radio signals in their cell phones.
* In ''Anime/XamdLostMemories'', it becomes clear fairly early on that both human form weapons and Hiruko are former humans.
* ''Franchise/YuGiOh'':
** During the Virtual World arc, Kaiba's former board members, the Big Five, had uploaded their minds into a virtual reality game to defeat him; their own defeat led to their minds being trapped in cyberspace. Later, Noah discovered them and brought them to his separate virtual world, where they assumed the forms of various creatures from the Duel Monsters game in order to challenge Kaiba and his allies. They later managed to assume a human form again by taking over the virtual avatar of Tristan Taylor; Tristan himself became trapped in the form of a robotic monkey after losing a duel with one of the Big Five but was restored to normal upon exiting the world and returning to his physical body. [[spoiler:Kaiba's stepfather Gozaburo also demonstrated the ability to assume a monstrous form in the virtual world.]]
** Yubel, the BigBad of season three of ''Anime/YuGiOhGX''. [[AmbiguousGender They]] [[spoiler: willingly gave up their humanity and was turned into a demon in order to become a spiritual guardian for their ward (who would become Judai in later life).]]
** All of the villains originating from the BadFuture of ''Anime/YuGiOh5Ds'', including Z-one, Aporia, and Paradox. The first is a cyborg with god-like powers, while the other two are android incarnations of their previous selves.
** The Seven Barian Emperors, the antagonists of the second season of ''Anime/YuGiOhZexal'', were all once human, and they can assume human forms that resemble - for the most part - their original forms.
----
* In ''Manga/AttackOnTitan'', [[spoiler: the Titans are all human. More specifically, they are all members of the Eldian people descended from the original Titan, Ymir Fritz. When exposed to a special serum made from spinal fluid, they are transformed into a mindless Titan and trapped in this state until killed or lucky enough to consume one of the Nine Titans. The Nine Titans (such as Eren) are the ''only'' Titans capable of regaining their human form and controlling their powers, while all others remain in a state once described as an "endless nightmare". Little surprise the oppressive Marleyan regime uses it as a form of execution for Eldians]].
* ''Manga/{{Berserk}}'': Every Apostle was once human. Humans become Apostles when a creepy little egg-like item called a Behelit comes into their possession and they hit an [[DespairEventHorizon emotional nadir]] where they will do anything to get out of their current situation. At this point, the Behelit rearranges the features scattered upon its surface into a human face and screams, which summons the three ([[spoiler:later ''[[WalkingSpoiler four]]'']]) dark gods of the God Hand, who proceed to [[DealWithTheDevil offer him or her the chance to become a Apostle in exchange for the sacrifice of those closest to them]]. It also turns out that [[spoiler: every member of the God Hand was also human, and they were created with the use of Behelits as well]]. While Apostles do sometimes retain the personalities they had when they were human, all too often they commit TranshumanTreachery, with many of them preferring to [[ImAHumanitarian dine on their former species]]. When Apostles die, they typically [[ThisWasHisTrueForm revert to their former human forms]] after their spirits are DraggedOffToHell.
* ''Manga/{{Bleach}}''. Every Hollow started out as a lost human soul. Eventually, it lost its heart, whether through time or the attacks of another Hollow, and became a monster, feeling nothing but the desire to murder and a hunger for souls. If they survive long enough, Hollows can "get over it" on their own (or if someone else removes their mask or uses the Hogyoku on them) and become Arrancar, who are intelligent creatures and apparently don't need to eat souls anymore (considering that they have copious amounts of regular food in Las Noches and only three or so Arrancar are ever shown any desire to eat anyone... and of those, one is a MadScientist who's turned his minions into edible medicine and another has the ability to gain the powers of anyone he eats, so they're not just eating for the sake of eating.)
* ''Anime/BNABrandNewAnimal'': Michiru and Nazuna were once human schoolgirls, until they both got into a car accident, and a blood transfusion mixup changed their lives, as they both got beastman blood and end up transforming into a {{tanuki}} and a {{kitsune}}, respectively.
* ''Manga/ChronoCrusade'' has an unusual example revealed towards the end: [[spoiler:[[HiveQueen Pandaemonium]] was once a human woman pregnant with twins. The demons kidnapped her and transformed her into the monstrous, MindRape-using queen she is -- and transformed her human children, Chrono and Aion, into demons as well.]]
* ''Manga/{{Claymore}}'': Each and every Awakened Being and, perhaps more shockingly, the Abyss Eaters. Even more shockingly, [[spoiler:the Youma]].
* ''Manga/DeliciousInDungeon'': The zombies, walking skeletons and ghouls are the re-animated corpses and ghosts of adventurers who couldn't be revived for various reasons.
* ''The Demon Prince of Momochi House'': Aoi happened to wander into the titular house as a child, only for the house to choose him as "Omamori-sama." Meaning, he becomes a [[MixAndMatchCritters N]][[{{Youkai}} ue]]. Luckily, he can shapeshift between his human and Nue forms.
* ''Manga/DGrayMan'': Akumas. Their hunters know, at least in abstract, that they contain the souls of innocent people forever tortured until the Akuma are destroyed and they're released, but only Allen has to confront the vision of them on a daily basis. As with Hollows (though in Bleach it's a different story), leveling up obscures more and more the original souls, until even Allen can't see them anymore. It also makes new souls in the process.
* ''Manga/ElfenLied'': Anna, when first introduced, is an adorable and happy, if dimwitted, young girl who loves to run. [[spoiler:Her father is disappointed with her lack of intelligence, and transforms her into an enormous, horribly mutated creature with super-intelligence and precognitive ability. She cannot support the weight of [[MyBrainIsBig her gigantic head, and]] so must remain virtually immobile in a pool. Remember how she loved to run? [[BlessedWithSuck Yeah]]. She gets better and is overjoyed when she realizes she can't do simple math.]]
* ''Manga/FairyTail'': The dragon [[spoiler:Acnologia]] and [[spoiler:Spriggan 12 member Irene Belserion]] were originally human Dragon Slayers. However, their magic eventually ran out of control and morphed their bodies into that of dragons [[spoiler:though Acnologia figured out how to retake his human form at will while Irene regained her physical human appearance thanks to Zeref, though biologically she's still a dragon]]. Turns out this is something that happens to all Dragon Slayers eventually, [[spoiler:unless they have certain antibodies to prevent it. The present-day Dragon Slayers' Dragon parents sealed themselves in their children for seven years to create those antibodies.]]
* ''Manga/FrankenFran'': This happens a ''lot'' to people who go under Fran Madaraki's scalpel, or that of her creator.
* ''Manga/FullmetalAlchemist'':
** Shou Tucker, the Sewing Life alchemist, fuses [[spoiler:his daughter Nina with her dog, Alexander. He also fused his wife with another beast a few years back, in order to gain his certification. Both chimeras are able to talk, and they both make it known they're ''not'' happy with their new existence. The one made from his wife asks to be killed and when, it isn't obliged, starves itself. The one made from Nina and Alexander is killed by Scar.]]
** This happens to [[spoiler:Tucker himself, too]], but only in the 2003 anime adaptation -- in all other versions [[spoiler:he's executed for his crimes]]. He's made into a chimera and officially listed as having been executed by the state so that he can continue his experiments for the government in secret.
** There are a number of other cases in the series. Perhaps most notable are the chimeras working for Greed and [[spoiler: Kimblee]], who were soldiers fused with animals -- though most of them retained their human forms, they're none too happy about their situation and the latter join the heroes so that they can eventually become fully human again--and the former serial killers used as guards at Laboratory 5, who were officially executed but actually had their souls bonded to suits of armor just like Alphonse. Slicer and [[spoiler: his brother]] lament their situation and, in the 2003 version, the latter actually ends up committing suicide, but the other guard, Barry, is perfectly fine with it and if anything ''prefers'' his new body to the old one.
* ''Manga/Hellsing'': In OVA 8, it is revealed that Alucard was once Vlad the impaler.
* ''Manga/InuYasha'': [[BigBad Naraku]] was once an ordinary bandit. He has [[DealWithTheDevil made a pact with a lot of]] [[PuppeteerParasite lower youkai]], and thus he has become who he is.
* ''Manga/KingOfThorn'' has the "mother monster", which is eventually revealed to have been a human ([[spoiler:Shizuku]]) who succumbed to TheVirus.
* ''Manga/MadeInAbyss'' has creatures that are known to show up occasionally in the depths, called Narehate, that are known to be the living remains of those who traveled to the Capital of the Unreturned and...well, returned. The ones encountered in the Sea of Corpses and layers above generally look completely inhuman and have no shred of sanity or capability for rational thought left. [[spoiler:The only apparent exception is the [[BeastMan rabbit girl]] Nanache. Later, more human-like Narehate are discovered in the Capital of the Unreturned, although they appear to have become Narehate through a different mechanism]].
* In ''Manga/MagiLabyrinthOfMagic'', all the Djinns were revealed to be once members of the sentient species that were freed and later allied with Solomon.
* ''Manga/MissKobayashisDragonMaid'': It's implied that Fafnir was not born as a dragon but instead transformed into one, [[Myth/NorseMythology much like his mythological counterpart]].
* ''Manga/{{Naruto}}'':
** The [[spoiler:thousands of Zetsu clones]] were victims of the first [[LotusEaterMachine Infinite Tsukiyomi]] rather than [[spoiler:clones of Hashirama]]. The end goal of [[spoiler:Kaguya]] is to create an army using the same technique.
** The Juubi was created when [[spoiler:Kaguya merged herself into the God-Tree]].
* ''Manga/OnePiece'' has the island of [[spoiler:Dressrosa. Their humans and living toys live together. Except unlike other fantastic beings in One Piece, these "toys" were once humans but turned into toy creatures]] by a Devil Fruit user.
* Many (though not all) of the various monsters from ''Webcomic/OnePunchMan'' were formerly human. Humans can naturally transform into monsters if they overly indulge in obsessive behaviors (i.e. Crablante, a guy who ate too much crab meat until he eventually turned into a grotesque crab-human hybrid); or by some external methods (like drinking a mutagenic serum, or eating "monster cells" to instantly trigger a metamorphosis).
* In ''Anime/PuellaMagiMadokaMagica'', it turns out that [[spoiler:every single [[EldritchAbomination Witch]] that the magical girls fight (those that aren't ex-familiars, anyway) was once a magical girl herself]], and to make things even worse, [[spoiler:every magical girl is ultimately doomed to [[AndThenJohnWasAZombie become one of the very monsters she's been fighting]], unless she dies first.]]
* ''Manga/RosarioToVampire'': [[spoiler:Hokuto Kaneshiro is revealed to be this, having been human like Tsukune before being injected with Kiria's blood. His new true form is infinitely more [[EldritchAbomination horrifying]]]].
** Over the course of the series, [[spoiler:Tsukune]] also undergoes a series of translations that make him less human and more monster, but under more controlled circumstances. [[spoiler:He learns to control each of them and thus even after becoming fully vampire his mind is unchanged from when he was human. And when not actively using his powers he still looks human, other than being [[{{Bishonen}} better looking]] than he used to be.]]
* ''Manga/AssassinationClassroom'': [[spoiler: Koro-sensei was once a human assassin, before he was captured and gradually transformed into a tentacled monster.]]
* ''Anime/SailorMoon'': Many of the monsters were originally human. Some of the Youma in the first season and the Phage of the last season. Sailor Moon's power to restore the Phage to normal actually shocks the Starlights, as they had to simply destroy them because they lacked the power to do so without their princess. A single human-based Daimon also appeared in a flashback which was closer to their [[Manga/SailorMoon manga]] version. The lemures were also either human or human-like aliens before their queen stole their dreams. Then they got weird. And the Witches Five were, essentially, humans possessed by Daimon Seeds. Also inverted, where a few enemies like the Great Youma were monsters born into human form.
%%* ''Manga/{{Saiyuki}}'': Hakkai, even though he's not terribly monstrous or ''in''human now, even in his demon form, and only really has to avoid it because the minus wave currently makes demons AxCrazy.%%So how *is* he an example, exactly?
* ''Manga/SeraphOfTheEnd'': Vampires were once humans themselves.
* ''Manga/WorldEmbryo'': The enemy virus, Kanshu, were once humans who lost their memories and transformed into hideous beings upon listening to the infected radio signals in their cell phones.
* In ''Anime/XamdLostMemories'', it becomes clear fairly early on that both human form weapons and Hiruko are former humans.
* ''Franchise/YuGiOh'':
** During the Virtual World arc, Kaiba's former board members, the Big Five, had uploaded their minds into a virtual reality game to defeat him; their own defeat led to their minds being trapped in cyberspace. Later, Noah discovered them and brought them to his separate virtual world, where they assumed the forms of various creatures from the Duel Monsters game in order to challenge Kaiba and his allies. They later managed to assume a human form again by taking over the virtual avatar of Tristan Taylor; Tristan himself became trapped in the form of a robotic monkey after losing a duel with one of the Big Five but was restored to normal upon exiting the world and returning to his physical body. [[spoiler:Kaiba's stepfather Gozaburo also demonstrated the ability to assume a monstrous form in the virtual world.]]
** Yubel, the BigBad of season three of ''Anime/YuGiOhGX''. [[AmbiguousGender They]] [[spoiler: willingly gave up their humanity and was turned into a demon in order to become a spiritual guardian for their ward (who would become Judai in later life).]]
** All of the villains originating from the BadFuture of ''Anime/YuGiOh5Ds'', including Z-one, Aporia, and Paradox. The first is a cyborg with god-like powers, while the other two are android incarnations of their previous selves.
** The Seven Barian Emperors, the antagonists of the second season of ''Anime/YuGiOhZexal'', were all once human, and they can assume human forms that resemble - for the most part - their original forms.
----
