History Main / OCStandIn

* ''Fanfic/FrozenHeartsRedWitch'': Thanks to the fic being made before we had any idea of what she was like, Betty is this.

* Creator/LilaGaela: ''[[https://archiveofourown.org/works/27805327/chapters/68073004 Amaranthine Shadows]]'' has a rather particular and more fleshed-out version of Galatea from ''WesternAnimation/WinxClub''. Galatea is a very, very minor character in the series. In canon, she's a plot device whose only purpose is to be rescued by Musa so the latter can gain her Enchantix and use her Fairy Dust to heal the former's ripped-off wings. One might think that any fairy would suffer severe trauma after losing her wings by a witch's hands, even if said fairy later regained them. Winx Club's creators shoved aside all of this after that episode so this fanwork occupies itself on correcting the loose ends. Galatea indeed gets PTSD afterward and a real personality. She's a perfectionist, she's haughty, and since her wings don't immediately grow again after being healed by Musa, she thrives for power in order to regain control.

* The ''Film/TransformersFilmSeries'' is full of characters that hardly get any development that many fanfic writers expand on, some noticeable examples include [[Film/{{Transformers}} Annabelle Lennox (and occasionally her parents)]] and Autobots who are not named Optimus Prime and Bumblebee.

[[folder:Tabletop Games]]
* ''TabletopGame/Warhammer40000'' has two Lost Primarchs so that players can have non-canon SpaceMarine chapters of their very own to play with.
[[/folder]]

** Gothmog is the second-in-command of Minas Morgul who took over the army at Pelennor after the Witch-King died. This is the entire extent of what we know about him, with even his species being indeterminate, as he's mentioned once in the entire series, not even being filled out in the appendices. However, given that there are relatively few named villains in the books, especially high-ranking ones, quite a few derivative works have ended up filling him out more. [[Film/TheLordOfTheRings The Peter Jackson films]] made him into a severely disfigured orc general, ''VideoGame/LordOfTheRingsOnline'' turned him into [[FallenHero the lost king Eärnur]], having been transformed into a wraith, and the ''War of the Ring'' tabletop game depicted him as [[TheFaceless a humanoid warrior in heavy concealing armor.]]

* [[http://www.alara.net/opeople/xbooks/virtuous.html This]] ''Franchise/XMen'' fic is one of the rare PossessionSue cases. It takes a very obscure character (ComicBook/{{Magneto}}'s canonically-dead wife Magda) and turns her from a meek woman whose only real moment of characterization was fleeing her husband after he accidentally killed a bunch of people into a [[FountainOfYouth de-aged]] (since, as a Holocaust survivor, she should be fairly old, even with ComicBookTime) [[GadgeteerGenius genius roboticist]] mutant with a power that's supposedly completely unique and desirable enough that people would kidnap her for it (despite there already being a canon character with the same power whom no one makes much of a fuss over).