Wow, very interesting.

This is how I see things. I agree with Ema there aren't two Roleblockers, therefore one of you is mafia. My guess is that Will has a role that will get him out of him being wrong about Plum which is why he was willing to make that argument (Godfather, a role that kills himself any would do). The fact that he could be wrong and his roleclaim would still be possible makes it more likely.

I'm close to changing my vote, but before I do, who did you block Ema?