Aria Ariake

She is a junior of Class 9 and a member of the Athletics Club, on which she is a regular.Ariake approaches the Student Council after her shoes have been vandalized, and a note saying "Quit the Athletics Club" is left in her locker. Understandably upset, Ariake asks Medaka Kurokami and Zenkichi to find the cluprit. (Source: Medaka Box Wiki)