Another student of S Class, he is nicknamed "ochibi-chan" due to his short stature, much to his chagrin. He's very cheerful and energetic, and plays the violin. He has a twin brother, Kaoru. Syo is Natsuki's roommate and childhood friend as well. When he was five years old, he almost fell from a very high tower while being chased by Natsuki and developed a fear of heights, but is later cured of his acrophobia with help from everyone.