 First introduced to the "Star Wars" expanded universe in Timothy Zahn’s "Thrawn Trilogy" through his arch villain Grand Admiral Thrawn, the Chiss have since developed into a popular species amongst fans and other Expanded Universe authors.Another notable Chiss was Sev'rance Tann, a Dark Acolyte serving Count Dooku and a general in the Armed Forces of the Confederacy of Independent Systems (believed to have actually preceded General Grievous as Supreme Commander of the Droid Armies).In the Expanded Universe, Csilla is identified as the homeworld of the Chiss.