The Exojin (エキソ人, Ekisojin) are a unique species of extremely powerful and advanced artificial human beings who are designed, born, and constructed for the sole purpose of destroying monsters as quickly, brutally and as onesidedly as possible. As highly dangerous and intelligent synthetic human beings who are born out of artificial flesh, muscle fibers, and organs, they are considered the cutting edge of cyborg technology, being almost indistinguishable from that of normal human beings.