Ryuu holds the 7th position in school, although his test scores are a poor reflection of his intellectual prowess. He is in 7th place mainly because of the twins - Megumi tends to fall asleep and Jun becomes bored during the test, which results in Ryuu focusing the majority of his attention on them instead of his own exam. As a result, it is suggested that Ryuu could actually be on par with Hikari or Kei. He has been close to Megumi and Jun since they were very young; it is evident that he cares for the twins very much and that the three of them see each other as family. An even-tempered and kindhearted person, Ryuu loves animals, going as far as to construct an animal enclosure, which includes monkeys and elephants, in his own apartment and is good with children. He is also the first amongst the S.A to discover, by accident, Finn's true gender. After spending some time with her, it becomes evident that he is falling in love with Finn. He is the son of the CEO of a sports company and one of his family's clients is Yahiro's family.
