Konoha's older brother, and grandson of Mitsugai Amagi. Both academically and sports-inclined, especially soccer. However, although he is popular with girls, he doesn't really know how to act around them, and Jin says he is "so honest, it hurts." Due to his attraction to an anime 'Ginga Choujin Alphasz', Kouga has developed a strong sense of justice since young. Urged by his encounter with Jin during a fire accident (caused by a Player) to become a hero of justice.