Hyouma is a light blue-greyish Japanese Wolf, adopted son of Reima and supposedly, the heir of his kingdom. He is one of the Eight Canine Warriors of Sirius, Metsu Hen'i Battouga warrior and able to raise mist.

Born to two unknown wolves, Hyouma was adopted by Reima. He and Retsuga were sent to kidnap Cross and her pups to lore Gin to Reima. Hyouma used his mist powers to cover their trail. He doesn't like Gin and the other dogs and the idea of Gin being a Battouga user. But in the end, he accepts Gin and fights against Gaia's soldiers, defeating Gold Eye.

In the end, he joins Gin's Army and leaves for Ohu. It is unknown if Hyouma is alive or deceased.

Hiyouma's color is confirmed to be grey in colored manga edition.