Shanks is our immediate and only scum interest.
Another thing is Fuji hasn't repeated any of the role so far. Even non-unique roles are not repeated in the set up. So, having two nobles don't fit.
Mastermind is also immune to invest + Shanks didn't counter claim bear yesterday at all. He came, read tags and dip.
He's our primary sus.
If he flips town or there's another one of unseen then one of our claimer is lying