Kuzaro was born in Kirigakure. Famous for being the "Reincarnation of the Devil", he confronted his brother, since both wanted to become members of the Seven Swordsmen of the Mist together. This dream was acted as motivation for them, to complete the cruel missions day by day. His brother eventually managed to get into the organization however the ambition of both was frustrated by the premature death of his brother.
"I'll be the best Weapon Master ever."