Yui Aoi

Yui is one of the two main female characters of the series along with Hanabi and is part of a three-girl clique along with Hanabi and Marin. She is developing both physically and mentally the earliest out of the group, but is still insecure due to the presence of not having a mother around to help, so she often asks Marin. Projecting a model student air, Yui initially dislikes Hiyama due to his delinquent-like attitude and his hobby of teasing her, but grew to like him after he spent a long time trying to find something important for her that she lost.