Minamo Negishi

Daichi's little sister who always carries a camera with her. She's in her first year of middle school but often gets mistaken for a grade schooler. She's usually always cheerful, but has a curious habit of speaking in a very direct and spontaneous manner, not pulling any verbal punches. She eventually joins Sora's group of friends after they meet again while Sora is on a small drawing trip in the neighborhood, which culminates in Sora borrowing Minamo's camera for a short while for sketching purposes, and then later draws a sketch of the then-sleeping Minamo. (With 30% cuteness added, at least according to Minamo herself.)