Ninth Sister

https://lumiere-a.akamaihd.net/v1/images/ninth_sister_-_bd_villainsscreenshots_ninth_sister_v04_ea712366.jpeg?region=0%2C0%2C1280%2C720&width=960As much as I'm sure we'd all love Grand Inquisitor or any of the others from Rebels as the next entries, she seems like the clear next choice for Inquisitorius if they're starting off with Second Sister as a leader. Would work very well thematically as a tank. Also a certified baddie.