Bayushi Aramasu was the son of Bayushi Aramoro and Yogo Asami. Aramasu was for the most part ignored by his father, and his resentment of this led him to fall in with the Kolat early in his life. He was fostered to the Mantis Clan as part of a Scorpion deal between his father and Yoritomo. Aramasu corrected his kolat mistake by betraying them and using their information network to help Yoritomo in his attacks on the Phoenix lands. Yoritomo adopted him becoming Yoritomo Aramasu.