Because a few of your MCU players are horrible, horrible people, I'm looking into possibly apping Darcy Lewis from the Thor movie(s). However, she at the moment has only the history we get in the film and not even comics history to fall back on like pretty much everyone else. Is she appable, by your rules? She has personality and everything else, but except for "poli sci major at Culver who's Jane's intern by default since no one else signed up", we don't know anything about her pre-movie.

And the Culver thing might be just generally accepted fanon for all I can tell, honestly.