Varko was a Human male who served as an admiral for Dark Lord of the Sith Darth Malak's Sith Empire during the final year of the Jedi Civil War. He assumed Saul Karath's position as Malak's second-in-command when Karath was slain by Galactic Republic commander Carth Onasi and two Jedi, Bastila Shan and Revan, aboard the Leviathan, Malak's flagship. Shortly after Varko reported on the status of the Star Forge, the Rakatan space station fueling the Sith Empire's war effort, Malak was slain by the redeemed Jedi Revan, and the Empire which Varko served was defeated at Rakata Prime.