Non Non Biyori: Komari Koshigaya

Komari is a second-year middle school student of the Asahigaoka Branch School. She is Yukiko's eldest daughter, Suguru's younger sister, and Natsumi's elder sister. She is quite short, which she has a complex about. Because of her height, she is usually mistaken for a child.

She longs to be a mature adult but is often easily scared, something which Natsumi takes advantage of. Still, she is shown to be responsible and looks out for her friends. She is bad at cooking.

Non Non Biyori: Yukiko Koshigaya

Yukiko is Suguru, Komari, and Natsumi's mother. She is a graduate of the Asahigaoka Branch School. Although usually strict and demanding to her children, especially Natsumi, she is shown to have a gentle and caring side when dealing with other people.