Sounds good! I think he and Devyn could definitely become friends. She's a pretty friendly, outgoing person who is kind of hard not to like. Although she is stubborn and not afraid to voice her opinion on things either.
Charlie... I am still getting a feel for her in this game right now. I've played her before, but in a far different game/context. She'd probably try to sleep with him, though. Then get mad if he turned her down and act out which could always be amusing.