I can think of a lot of things I would never do, but I don't think they plan on trying to use my double against me.

[ L does well to describe him. Those are traits he would be proud to carry. Those are traits that made it necessary for him to become Kira. ]

But they shouldn't respond in too many ways so out of character that it would be a distraction to you. Unless they begin trying to murder the perish or seduce the priest, it'll be small inconsistences.