Kamui Tenrou
Kamui Tenrou is the final boss of BBBR. He is Kunagi's older brother, who was corrupted and driven insane by the powers within the Demonic Boundary Hole that he accidentally unsealed when he attempted to find a cure for Kunagi's sickness.


It is not observed in BBB and BBBR, but the possession mentioned above forcibly splits Kamui into two people. The "good" Kamui made sure that Senna made it to the Wolf Fang Brigade and sealed her memories, while the "evil" Kamui is the one that distributed the MacGuffins that created the "Special Students", and is faced as the final boss.