Ussej Padric Bac, also called Darth Mantus, was a Human male Jedi Master in the years following the Great Territorial War. During the war, Bac fell in love with Laili Jeyna Rendar, which caused him to have feelings of paranoia. This prompted him to believe that Damien Nightblade was attempting to steal Rendar from him. His emotions culminated in his turn to the dark side of the Force, when he became a member of the Sith. He was redeemed by the war's end.