Military Role: Thunderstroke Soldier
Crime: Slaying a goddess, military malfeasance

Xylo is a former captain of the Federated Kingdom's Fifth Order of the Holy Knights and a member of the Penal Hero Unit 9004. 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 the goddess Senerva.

He has tanned skin, spiky hair, and often speaks in a rough manner even to his superiors. His preferred weapons are throwing knives and swords, which he hurls at his enemies before activating his sacred seal. Of the sacred seals on his body that once made up his seal compound, only two remain usable: Sakara, a flight seal that enhances jumping and allows brief aerial movement, and Zatte Finde, a heat-and-light seal that lets him infuse weapons with luminescence and trigger controlled explosions.