Chilla Zin, a Voridsec of the male gender, possessed four arms and skill with four blades. During the time of the Imperial Era, he belonged to the Assassin's Guild. He, along with the droid named Gee-Ninety and the sniper known as Loriach, was employed by Ochi of Bestoon, a Sith assassin, for the purpose of assassinating a pontiff connected to Crimson Dawn located on the planet Vincorba. Neither Zin nor his partners knew that the assignment was actually a trial set by Darth Vader, the Sith Lord who was Ochi's superior. Vader's ultimate goal was to recruit them for his own mission: the eradication of Crimson Dawn.