Just hurt Aoi's feelings, I'm sure he'll go crawl in a corner and cry for a day, that will take the fight out of him. I feel like Ruki and I would get along just fine so I wouldn't worry about him becoming violent. I'd be more scared of Kai - always suspect the people you don't expect to do something crazy. I bet Kai is a real badass. And I don't think many ppl get away with anything with Reita. He looks the manliest so I just assume that. as for Uruha, he'll probably just say hurtful things and not do anything physically. Just ignore his drunk a$s. Or get him drunk and steal his wallet.