Miki Mizuguchi

Оригінальне ім’я: 水口未希

She is part of the brass band club who indirectly helps [Himari](https://anilist.co/character/167670/Kino-Himari)'s and [Yori](https://anilist.co/character/167671/Asanagi-Yori)'s relationship by collecting information.