History Main / SexShifter

* ''LightNovel/ReignOfTheSevenSpellblades'': Volume 2 reveals main cast member Pete Reston to be a "reversi", a mage with the ability to swap sexes. This has some technical advantages such as allowing him to use his uterus as additional magical storage when in female form, and [[spoiler:immunizing him to [[SmellsSexy Ophelia Salvadori's Perfume]] when he [[IncompatibleOrientation switches to female while unconscious]] after she kidnaps him in male form]]. Pete doesn't have full control of it and is prone to switching in his sleep.

* The eponymous junior high school boy of ''Manga/FutabaKunChange'' becomes a girl whenever he becomes sexually aroused and changes back some arbitrary amount of time after his arousal passes. This runs in his family; the man Futaba always believed to be his father actually gave birth to him.

* Iori/Shiori of ''Manga/OsananajimiwaOnnanokoniNaare'' is a functional sex-shifter: The fairy Sylphie turns them from their original male form (Iori) to a female one (Shiori) as often as possible, intending the change to be permanent, but they're ResistantToMagic enough to prevent or reverse it by insisting they're male regardless. But Shiori has to be ''confident'' while saying so, thus undermining her masculinity (usually by making her conscious of her female body) causes a ShapeshifterModeLock, which Sylphie tries to exploit.

* In Creator/NKJemisin's ''Literature/InheritanceTrilogy'', the GodOfChaos Nahadoth uses [[AFormYouAreComfortableWith human manifestations]] of all genders and has had children in a variety of reproductive roles. Given that Nahadoth's true form is infinite, inchoate primordial darkness, the distinctions are fairly academic to him.

* The ''[[https://mangadex.org/title/56189/fate-grand-order-daily-chaldea-doujinshi/chapters/ Daily Chaldea]]'' version of [[VideoGame/FateGrandOrder Ritsuka Fujimaru]] has been changing gender as easily as breathing for so long they no longer remember what their original gender was (#574). Their family studied shapeshifting for PowerCopying superhuman physiology and failed, leaving this as their specialty (#649).

* Iori/Shiori of ''Manga/OsananajimiwaOnnanokoniNaare'' is a functional sex-shifter: The fairy Sylphie turns them from their original male form (Iori) to a female one (Shiori) as often as possible, intending the change to be permanent, but they're ResistantToMagic enough to reverse it by insisting they're male regardless. But Shiori has to be ''confident'' while saying so, thus undermining her masculinity (usually by making her conscious of her female body) causes a ShapeshifterModeLock, which Sylphie tries to exploit.

* The eponymous junior high school boy of ''Manga/FutabaKunChange'' becomes a girl whenever he becomes sexually aroused and changes back some arbitrary amount of time after his arousal passes. This runs in his family; the man Futaba always believed to be his father actually gave birth to him.

** The ''ComicBook/{{Eternals}}'' can change their appearance, including their sex, when the great machine resets and resurrects them. Many of them choose to do this fairly often by Eternal standards - every 30,000 years or so.

** The ''ComicBook/{{Eternals}}'' can change their appearance, including their sex, when the great machine resets and resurrects them. Many of them choose to do this fairly often by Eternal standards - every 20,000 years or so.

** The ''ComicBook/Eternals'' can change their appearance, including their sex, when the great machine resets and resurrects them. Many of them choose to do this fairly often by Eternal standards - every 20,000 years or so.

* The Skrulls in the Marvel Universe can change their sex as well as appearance. In ''ComicBook/{{Runaways}}'' Super Skrull in training, Xavin, is engaged to Karolina for an ArrangedMarriage set up by their parents as a peace keep measure between their races. Karolina isn't interested not because she isn't sold on the marriage thing, but because she's a lesbian. Xavin handily solves this by showing her his/her female form and [[PerfectlyArrangedMarriage and Karolina has no complaints]].
* One of the many magic keys from ''ComicBook/LockeAndKey'' allows a person to do this.
* [[ComicBook/{{Thor}} Loki]], as a shapeshifter can take any human form, male or female. Seen most notably in his own series, ''ComicBook/LokiAgentOfAsgard''.
* Apex from ''ComicBook/AvengersArena'' is an interesting case. She shares her body with her brother and their body shifts gender depending on who is in control.

* Manga/BlackButler: [[spoiler: Ash Landers and Angela Blanc]] are revealed to be the same character shifting sex. They have somewhat different personalities though.

* In zoology this is called [[https://en.wikipedia.org/wiki/Sequential_hermaphroditism "sequential hermaphroditism"]] and has been observed in many species of invertebrate, fish, and frog.
* In botany, this is called "dichogamy".

[[quoteright:350:[[ComicBook/{{Runaways}} https://static.tvtropes.org/pmwiki/pub/images/xavinshifting.jpg]]]]

*** Any Mage who's trained in Life magic can temporarily transform themselves or another person into the opposite sex. A prose interlude in one {{Sourcebook}} has a mage chew one of their peers out for trying to determine magically whether they're {{Transgender}} since it's ''incredibly'' rude to pry.

* ''Manga/RanmaOneHalf'': Because of the [[GenderBender specific]] [[BalefulPolymorph Jusenkyō curse]], Ranma Saotome can change between genders, turning into a girl when cold water is splashed on him, and changing back when hot water is splashed on her. One arc antagonist from later on is Prince Herb of the Musk Dynasty, who suffers from the same curse.

* The eponymous junior high school boy of ''Manga/FutabaKunChange'' becomes a girl whenever he becomes sexually aroused, and turns back into a boy whenever ''she'' is aroused. This runs in his family; the man Futaba always believed to be his father actually gave birth to him.

[[folder:Web Comics]]

[[folder:Anime and Manga]]

[[folder:Fanfiction]]

[[folder:Film — Live-Action]]

* Virginia Woolf's ''[[Literature/OrlandoABiography Orlando]]'' more or less spontaneously turned into a woman. ''Comicbook/TheLeagueOfExtraordinaryGentlemen'''s reinterpretation has that happen every few years, owing to his/her father Tiresias.

*** The white male General regenerates into a [[RaceLift black]] woman in [[Recap/DoctorWhoS35E12HellBent "Hell Bent"]]. Not only that, her dialogue indicates that all of the incarnations ''before'' the male General have been female as well.
*** The Doctor finally gets their turn in [[Recap/DoctorWho2017CSTwiceUponATime "Twice Upon a Time"]], as they regenerate into a woman in their thirteenth incarnation. Unlike Missy, though, she seems to go with a more androgynous look. Then again, she doesn't really seem to mind either, as her response to seeing her own reflection for the first time shows.

** [[Recap/DoctorWhoS14E2TheHandOfFear "The Hand of Fear"]] shows a Kastrian regenerating from female to male, and being surprised that the Doctor is surprised by it, as he should know all about regeneration.

* ''{{Series/Misfits}}'': Curtis gets this as his second power, having the ability to become a female version of himself at will, who he names Melissa.

[[folder:Webcomics]]

* In ''Podcast/MetamorCity'' people with the androgyne variation of the curse can change sex at will, though they need to spend more time as the opposite gender that they were born with. Considering that the original version of the curse was a one-way GenderBender.

* Certain elves in the fifth edition of ''TabletopGame/DungeonsAndDragons'' possess a power known as "Corellon's Blessing", which allows them to change their sex and gender during a long rest. This power is rare enough that the DM has to make a judgement call on whether or not an elven player character is allowed to have it (though it doesn't have any mechanical gameplay effect).
** Kobolds in the same edition will spontaneously change sex if there's a severe imbalance in the male to female ratio of a warren as a result of casualties inflicted by monsters or adventurers. As kobolds are egg-laying reptilian humanoids who lack any sexual dimorphism, this is not something that they consider a big deal beyond the way it helps their species survive in a hostile world.
** [[HornyDevils Succubi]] have been able to do this since at least the third edition of the game, for reasons that should be obvious.
** In the ''TabletopGame/ForgottenRealms'' setting, in older lore, the rare male clerics of Eilistraee, Goddess of Redeemed Drow, were said to need to regularly transform into women in order to maintain access to their holy magic. This lore was dropped in 3rd edition onwards for certain UnfortunateImplications.

* The Qin from ''TabletopGame/{{Aeon}}'' are small slug-like aliens who regularly switch sexes.

* In ''TabletopGame/KitsuneOfFoxesAndFools'' Hayaku can change genders at will, for free at the beginning of each turn and by spending one foxfire any other phase. Saski and Sareiko had a competition to see who could seduce them first, Saski impregnated Hayaku with Ai & Midori while Hayako knocked up Sareiko with Seiki.