He was the commander of the Order of the Dark Knights, a member of the Ten Lords Assembly that ruled over the Dark Territory in Underworld, and had a romantic relationship with his subordinate, Lipia Zancale. Unlike the majority of other lords of the Dark Territory, Shasta sought peace and secretly opposed Emperor Vector's plan to invade Human Empire. Vixur Ul Shasta was killed with a poisoned needle by Fu Za when Shasta attempted to attack Vector.