Xylo is a member of the Penal Hero Unit 9004 and although he is not the commander of the unit, he often acts the part especially on the battlefield. He was sentenced to being a hero for the crime of killing a goddess, Senerva. He has tanned skin and spiky hair and often speaks in a rough manner, even to his superiors. He mainly uses throwing knives or throws swords at his enemies and activates his seal compound to deliver damage or kill an enemy. His seal compound is that of an explosion that can be controlled depending on the amount he infuses in the seal.