The dancing wings of tomorrow. Disciple of Shuuyu. A young soldier who welds a big spear freely. In the story he 'babysits' Sonshoukou and there are many occasions that he is abused by Sonshoukou.
In the battle of the Red Cliff, Rikuson took command of the Koutou Navy covering for Shuuyu who was badly injured in the attack of the Keishuu troops. After the Red Cliff battle he succeeds the position of the fallen Shuuyu. Teiho is his subordinate.
In the Brave Battle Warriors anime, he was orphaned during Toutaku's reign, and his whole village wasn't spared. He was harassed by some Pirate Aesculapius when Sonshoukou stepped in, along with the rest of the Son army. Sonshoukou offered him to join their family, to which he happily accepted. After witnessing how Shuuyu's stratagem repelled Kirei and his army, Rikuson decided to become his student.