Lieutenant Sil Unch was a male Neimoidian with mottled gray skin and red eyes. By the year 32 BBY, Lieutenant Sil Unch served as a comm officer aboard the Trade Federation flagship, the modified Lucrehulk-class LH-3210 cargo freighter Saak'ak. During the Invasion of Naboo, he was assigned by Gunray to the Droid Control Ship Vuutun Palaa when the Saak'ak left the Naboo system, where he was killed when it was destroyed by Anakin Skywalker during the Battle of Naboo. Specialized in battle droid control programming and interfaces, Sil Unch did not enjoy being commanded by Captain Daultay Dofine.