Ryuya Miura

Ryuya is Ito's eldest brother, and the twin brother to Yûto. He is also the heir of the Miura family. He seems to have inherit his father's overly dramatic personality (especially when angered), much like Ito. After their mother's death, he was the one who taught Martial Arts to Ito. Also, he seems to be the one that is the most protective of Ito. Being the eldest makes him the one in charge most, if not all the time, considering that his Dad works at the dojo often or writing his novels. When Ryûya went to college, he met a foreign exchange student from America, Christina. Eventually, after a bizarre year of being with her, he and Chris fall in love. For a while he and his father had a debate over him being with her, but they were able to make amends thanks to Chris's "victory." (Source: Wikipedia)