Byakko

One of Xavier's four apostles. His true name is Rengoku (煉獄).

A large man who carries a pistol. His skin is pale, his ears are long, and he has great physical strength. He is the first apostle to rejoin Xavier after the gourd is broken, and leads the ninja group responsible for gathering the remaining gourds.

He is killed attempting to defeat Rance while defending Xavier.

His true form, Byakko, appears to be some sort of creature with horns. Unlike the other apostles, its unknown what human Rengoku appears from, or if he even appears from a human.