Yoritomo Fuyumi was an aide to Yoritomo Haruna. In 1200 the Mantis Islands were overrun by a Shadowlands horde that appeared after the destruction of the Third Seal, killing the Mantis Clan Champion Yoritomo Hiromi and his siblings. Yoritomo Yashinko assumed the leadership and ordered the Mantis Daimyo to gather at Cold Wind City any Mantis samurai in the mainland, to make a suicidal attempt to take back their homeland. Haruna sent Fuyumi in such task.