Masaru Hyūga (日向 勝 Hyūga Masaru?): Ai's younger brother. 10 years old. Like his sister, he practices Kendo. He encountered Akiba many times in the incident in charge, Like when he was taken captive by Togo (episode 44) or by God's Santa (ep 43-44). In the final episode, he was alongside his sister Ai during the duel between Hayato and Daimon.