|School||St. Chronica's Academy|
According to Kodaka, Matsuyama is of small stature and has a youthful appearance that gives off a friendly impression.
Matsuyama appears to be a very friendly individual as shown when he casually offered Kodaka his help with the scoreboard during a basketball match despite not being acquaintances before. He is also shown to have an amazement towards athletically-skilled women, one of which is a member of the school's basketball team; a girl named Saitou. His admiration also reaches to the likes of Sena's unmatched ball play on the court and Yozora's audaciousness in the face of a daring opponent.
As a member of their school's Judo Club, Matsuyama is shown to be quite skilled in hand-to-hand combat when he back-flipped Kodaka into submission.
- Matsuyama is a city of western Shikoku, Japan, on the Inland Sea. A port and distribution center, it was an important fortress town during the feudal period.