- Gender
- Male
- Age
- 14-15
- Birthday
- April 11
- Role
- Supporting
- Identity
- The sole male student at Asahigaoka Branch School, a third-year middle schooler, and the eldest son of the Koshigaya household — older brother to his two sisters.
Personality
Man of few words
Expressionless
Mysteriously low-key
Surprisingly talented
Easily overlooked
Suguru Koshigaya is one of the most enigmatic characters in Non Non Biyori — a boy who appears throughout the entire series without ever uttering a single word. Despite being frequently ignored or casually dismissed by those around him, including his own family, Suguru harbors a remarkable range of hidden talents. He plays guitar, accompanies others on piano, and crafts strikingly detailed clay models. Quietly blending otaku sensibility with an air of mystery, he leaves a lasting impression precisely because of what he never says.