Ito's oldest brother, and Yûto's twin, aged 23 years. Ryûya shares his father's dramatic personality, especially when angered. He is the most protective of the family of Ito, and after their mother's death, he taught her martial arts. As the eldest son, he is usually in charge of the household, as their father, Gorô, is usually either at the dojo or writing his novels. When Ryûya went to college, he met a foreign exchange student from America, Christina, and after a year of interesting courtship, they fell in love. For a while he and Gorô fought over going out with her, due to Gorô's declarations of never allowing a foreigner to marry any of his children. Christina or "Chris" eventually comes to challenge Gorô to date Ryūya, resorting to underhanded tactics to punch him in the face. Fortunately, Gorô instantly respects her for her resourcefulness and courage and gives the couple his blessing.
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