Hiyouma is Reima's adopted son and a Metsu-soldier. He has a little tuft on his head that reminds little bit of the Koga Ninja -dogs.
Hyouma can create mist which is an advantage for him in battle. After fighting against Gold Eye named wolf he was nearly to lose his life.
His attack is Metsu Hen i-Battoga.

Exists only in the mangas!