skullgirls, why so vague

Still poking at Skullgirls fic ideas, haven't committed to one yet. A canon-related question to anyone who's played the game:

It's never made clear how Lab Zero found and/or got a hold of Painwheel in the first place, right? Filia's story mode sorta implies that she (or her family) may be responsible for it, because I can't imagine why Filia would feel guilty about Carol -> Painwheel otherwise...

(Thinking about doing a ~seduction of the innocent~ scenario with either Valentine or Filia, because HEY WHY NOT.)