Higoromo Nanten♀

A new first-year student who enrolled at Senshinkan as Nobuaki's classmate.
However, since she has never attended school, Shishihachi and the others are unaware of her existence.
She gives off a somewhat gloomy, listless vibe, and as that impression suggests, it's hard to read what she's thinking.
She could be described as simply an ennui-type character, but she has a unique presence that draws those around her into a vortex of anxiety for no apparent reason.
Because of this, decent people tend to unconsciously avoid her, but for some reason, Nobuaki is the only one who seems to be in sync with Nanten mentally.