Kouhei Toba/B-Fighter Kabuto (鳥羽 甲平／ビーファイターカブト Toba Kōhei/Bī Faitā Kabuto) is a 17 year old high-school student dragged into the fight. A star athlete, Kouhei is a very courageous fighter, although he sometimes impetuous. He lives with his younger sister Yui, whom he cares for and overprotects. As Kabuto (and like Blue Beet before him), Kouhei dons armor modeled after a Japanese rhinoceros beetle. Kabuto is the only B-Fighter who can wield the Astral Saber to become one with and gain control of the giant robot, Kabuterios. After the final battle, he leaves for the United States for college studies and training in a New York office of Cosmo Academia.