Yorii Kiyoka♀

Kouta's classmate. She's an honor student from a wealthy family, gifted with good grades and athletic ability - on top of which she's got great looks and is nice to just about everybody. She's the idol of the school, but her hidden side has a tremendous competitive streak.... When she falls for you, who knows how far she'll go to win your affections away from Chieri?

[from official English site]