Los Dor, a Colonel within the Sith, participated in the Great Hyperspace War. He was a subordinate of Saes Rrogon, operating from the Sith dreadnaught known as the Harbinger. Acting as a covert operative for Naga Sadow, Dor monitored Rrogon's activities and evaluated his suitability as a Sith. His life concluded when Drev Hassin, piloting a Jedi Infiltrator, collided with the Harbinger's bridge.