V1 is the Killer Robot protagonist of ULTRAKILL. They're a non-binary combat robot with a blue frame, one yellow eye, and eight sets of wings that allow them to slide, dash, and carry their massive arsenal (ranging from spare arms to a railgun). The robot invaded Hell to find more blood while taking on the damned souls, other robots, demons, and even angels. According to V2's Terminal Data, V1's thin metal plating and unique refueling system allows them to repair damage by absorbing blood on contact.