Ventress, her character growth and story throughout the clone wars is a delight ! She also went through so many distinctive looks.
I could also just drink up the banter her and kenobi had. Ventress, Maul & Kenobi in that arc all around each other was a riot of a time.
Also Ventress going back to Talzin let us finally see why the whole setting is actually scared of Grievous and ya know i get it
Out of curiosity, why do you say the last part? I haven't seen it.
Its at the tail end of the Savage Oppress Arc - Dooku sends Greivous to deal with the night sisters and leading a droid armor they exterminate them.