A first year at Arisugawa Academy, who is normally an honor student befitting the prestigious image of the school. In actuality, she has a cocky personality with a sharp way of speaking, demonstrating her lack of filter. During junior high, she formed a duet with Hayate, her relationship with whom became so close that it turned  romantic . Kokoa is also a Tsundere and gets flustered by affection . She can be very rude sometimes . . From D4DJ , apart of Unichord .