Augustus Sol Invictus

Original member of the B-Team.

Backstory
Augustus Sol Invictus was a Jedi with generally unremarkable levels of force powers, except for his extremely powerful mind control powers. It has been implied that he may have insinuated himself into the B-Team through mind control and have been a far newer member of the team than others let on.

Season 1
Invictus assisted in the invasion and later liberation of Groomsh. Throughout his above board actions working with the B-Team to further the mission, he also created a network of cults worshiping the Old Ones (and also him personally) among the naturally psychic Groomshi population.

Death
Invictus was killed by the other members of the B-Team when they discovered he was working at odds with them, and assisting The Empire in its efforts to regain control of Groomsh.