This specific character served as a Dark Jedi within the Sith Empire led by Revan. Following Darth Malak's usurpation of the Empire's leadership, this Dark Jedi pledged their loyalty to the new Dark Lord, and Malak regarded them as one of his three most formidable adherents.
This Dark Jedi was proficient in combat utilizing a saberstaff.
This Dark Jedi's only appearance is in the dark side conclusion of Star Wars: Knights of the Old Republic, which is not considered canon. In this ending, Revan and Bastila Shan eliminate him. Because this event is not part of the official Star Wars timeline, what truly happened to him remains a mystery.