Birthday: May 4 Ryuu ranks 7th in the entire school cohort. He is the son of the CEO of a sports company and one of his family's clients is Yahiro's family. He is an animal lover and is very good at handling children. The twins, Megumi and Jun, are unusually close to him, considering they've been together all their childhood.

Spoiler

It is hinted that perhaps he is smarter than 7th place, but spends the majority of the time during exams worrying about Jun and Megumi, the type that tend to become bored or sleep during tests.

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In the manga, he falls in love with Finn, a girl who has to dress up as a boy for his country.

(Source: Wikipedia)