Sim Aloo was a human male who served as an adviser to Emperor Sheev Palpatine, the sole ruler of the Galactic Empire, during the Galactic Civil War. He traveled with Palpatine to the Death Star II, where the Emperor oversaw its construction before the Battle of Endor. Aloo was present in a meeting between the Emperor and his subordinates, including Darth Vader and Moff Tiaan Jerjerrod, and continued to advise his master aboard the battle station. He presumably perished when the Death Star was destroyed by the Rebel Alliance.