Tannin

[Gou](https://anilist.co/character/146667/Gou) and [Koharu's](https://anilist.co/character/148260/Koharu-Sakuragi) homeroom teacher is a recurring character who first appeared in Ep 11. During a class, she asked her students about their aspirations in life. This question ended up leaving Koharu unsure about her future.