Yuuna Matsumoto - 松本友奈
(Yu, Yuu-chan)
About
Yuuna is [Kouko Matsumoto](https://anilist.co/character/136814)'s little sister who appears for the first time when [Miyako Hoshino](https://anilist.co/character/131475) and [Hinata Hoshino](https://anilist.co/character/131477) go outside to go shop.
