[quote=@UnseenShade]
I'm game, though what is the power origin then? Is it an inborn human gene that skated under the radar till now? You mentioned it wasn't supernatural, mutant, or aliens.
[/quote]

Literally [i]no one [/i]has a clue.  :)  And my apologies, because I did not make myself very clear: by "No mutants, no aliens, no ancient mythological beings," I meant that at the beginning of the game, there's no record of genetic deviation that would cause super-powers, there has been no documented contact of Earth by aliens, and no mythological beings are known to be walking around.

For reasons of plot:

I would not allow a "mutant" character, in the sense that the character has some sort of genetic alteration that has been pinpointed as the source of her powers.  

A character [i]could be [/i]an alien, but he'd either have to keep that fact a secret, or deal with the considerable repercussions of being the first alien known to Earth.  

I would not allow a character to be some sort of mythological creature with a clear memory of ancient events and relationships with other mythological beings.  However, if someone transformed into, say, a quetzalcoatl, and concluded without corraborative evidence that he was actually the incarnation of the legend, I could work with that.  :)