Sayaka Arai

Arai Sayaka, named Matsuo in the first season of To LOVE-Ru anime, is a minor character, the classmate of Yuuki Rito in both his first and second year. She is often seen hanging around with Shirayuri Koyomi. She and Koyomi are Sairenji Haruna's fellow members of the tennis club. It is strongly implied that Koyomi is in love with Sayaka.