School: Sakaki Academy
Hobby: Track Team
Arimi is a very cute and outgoing girl, who even has her own fanclub! She loves to flirt, and says that she isn't very picky about a boys looks, which is why she is so popular. The only boy that she cannot stand is Rokutanda Tsutomu. She fell in love with Matsuura Yuu when they went to the same Junior High, and she later told Miki that she would not give up on him. She is a schemer, and even persueded Yuu to go out with her once.