He resembles a demon with mechanical features and red eyes. Iron Claw ordered him to steal a haul of gold from a secured vault with the help of the Crimers. They attempted an escape by cover their escape route from the robbed vault by covered the underground tunnel with a fake wall. Then make their get away by transporting the gold in an unmarked truck. However Heart Queen was able to determine the identity of their truck by scanning which one had gold in the cargo bend. The JAKQ was able to stop Devil Killer and the Crimers right at their tracks before they could send back the gold to Iron Claw. Devil Killer's main weapons are his large picers that cover his arms, and the ability to shoot out buzz saw blades from his chest.