Raiga was a Japanese Wolf, one of the Eight Canine Warriors of Sirius and Reima's minion. He is able to master the Zan Hishou Bunshin Battouga.
His body contains three wolf brothers: Sakon, Ukon and Raiga. Raiga is the oldest and the one in control of the body. The other two heads and tail show up when he's using his Battouga.

Raiga was the guardian of the Palace's outer entrance. He had few minions. He fought Kurotora but, once Moss gets in the fight, Raiga is defeated but becomes an ally of Gin and travels to Hokkaido with Reima to fight Gaia's army. Raiga tried to help Gin when the Akita is fighting Gaia but the latter buts all three heads from the body, killing Raiga, Sakon and Ukon.