Haha, for some reason, my first idea was to make a masochist that enjoys their torture, until he's probably killed. Dumb/Dark idea out of the way. 

So would I probably have to coordinate with a girl to have combined backstories or would my backstory consist of refusing to kill a bunch of girls as they came out of the labs and helping the group right out of the getgo? Maybe shooting back at the police I just left to prove it?