-Jacen GhostArx Jacen GhostArx, nicknamed "The Saboteur" was a Jedi Knight during the Rise of the Empire era. Before the Clone Wars, he was apprenticed to Jedi Master Plo Koon. He was knighted a month before the First Battle of Geonosis. Later on, he became the master of Ranulph Starbooster. He was also close friends with Tycho Railslasher and Anakin Skywalker.