If you're worried about never being able to have an interaction as a villain without IC conflict I'd say that probably won't happen unless you wander around bragging about how terrible you are and doing horrible things where people can see. There were several of FL's characters who were almost in that boat but they made a point of being assholes. I don't even know who is a villain and who isn't from many of these video game/shounen anime canons unless the character makes it incredibly clear by being an asshole where I have to watch, and then all bets are off. Greshan is a special case because I know who he is enough to absolutely hate him and so do most of my characters that know Jame in WT. Like, Ford is Jame's moirail. It would not be OOC for him to try to burn that coat on general principles. He can't do it, but that's okay as long as Greshan isn't trying to rape kids in the rave, because being confined to a coat is also a pretty good punishment.