Naoyasu Uchimura (内村 直泰 Uchimira Naoyasu) is a second year student at Seiin High School who serves as an outside hitter on the boys' volleyball team.
Uchimura is a cute boy with cheek-length grey hair styled with a middle part and brown eyes. He stands at 175 cm (5'9").
During matches, Uchimura wears his volleyball uniform – a navy blue jersey with sky blue and white stripes on the sleeves and corresponding navy blue shorts. His position number, 3, and the name of the school are printed on the front of his jersey in sky blue text with a white outline. On the court, he wears white kneepads and white volleyball shoes with black accents.
- The name Naoyasu means "straight, direct" (直) (nao) and "peaceful, calm, peace, easy, Thailand" (泰) (yasu).
- Naoyasu's surname Uchimura means "inside, within" (内) (uchi) and "town, village" (村) (mura).