西塚　音哉

Nishizuka Otoya is a senior at Souryou. Hamana Ryuusuke (whom he calls "Ryuu") is his childhood friend, and he is called "Oto" by him. During summer vacation, he worked at a clubhouse on the beach with Asou Takayasu, and would enjoy playing the fighting game Limit Breaker with him at Trafalgar, the local arcade. During his time working on the beach, he also encountered a boy who was trying to commit suicide, Serizawa Shiki, and saved him. At the start of the school year, he is reunited with Shiki, who has transfered to Souryou. He is an over-all nice guy, and has many friends. He lives with his parents and younger sister, Haruna, and commutes to school. He enjoys reading manga (particularly from the publication "Weekly Comic Seiron"), shooting hoops, and playing Limit Breaker in his free time, and his weak point is academics.

Voiced by Yoshino Hiroyuki.