Well, having Zehn alive might turn out useful. I honestly didn't analyze the roles too much because of the way they're written, it's annoying. But they might be a tailor of some sorts, and anyone can claim any bull**** they want, because roles aren't revealed upon death. Considering the mechanics of this game, it's possible that the cop ends up being mafia, if that happens they could investigate someone, kill them, and claim their role. With Zehn out of the picture, this would be entirely possible, reason why:
I sense a slight coordination between Nina, JD and Luzu. What does everyone think of this?
I can see where you're coming from with Nina and JD, but not with Luzu. What makes you think so?