Sakashiro Maya

She is a student at Suruga Keijo Training School. She is ranked second in Suruga. She is also the adoptive daughter of Ayako Sakashiro. [spoiler]Due to her personality disorder, Maya develops an alter ego as Kaya Sakashiro, who only emerges in a threatening situation that can't be handled by Maya. Kaya is ranked first in Suruga. In other words, the strongest Suruga's student.[/spoiler] (Source: Keijo!!!!!!!! Wikia)