Are there any examples of well-known characters that originated in a video game but are part of a non-video game franchise? Someone from a super hero game, maybe?
I'm trying to think of plausible workarounds to the "must be a game character" requirement.
The "Xeno" versions of the Dragonball cast from the Dragonball Heroes arcade games. They're basically game original versions of the Dragonball cast specifically for the Heroes original stories.
There's even a story with the actual Goku and Xeno Goku together.
A more realistic example, but that probably still won't happen, is any character from Megami Tensei related games. The original Megami Tensei was an adaptation of a novel, but everything afterwards was game original.