since i'm going to have ethan lean heavily every man for himself and more evil than not i think they may actually probably do some of both... both in the butting heads and agreeing on a few things. since she was friends with his sister for awhile they may have some outside/former family connections. i'm down for toxic behavior and pushing each other away when their plans don't align. he's got a huge chip on his shoulder and is super bitter about his upbringing so if she's opened up about that i think they would probably bond.