@kronix @Samhill I had to go back and look this all up as well, I had forgotten most of them.
Rokka = FMC = missing
Ichifu = wall yokai/lolibaba = not shown, stayed behind to care for MC's ghost sister Nanao
Momo = curly hair/big tits = human girl the MC liked since the beginning
Nagi = not shown in this chapter = Momo's older sister, apparent financier of this trip, sits on pervert ass yokai
Kei = short hair girl /lesbian = school friend of Momo (I think?)
Kirue = twin tails / spider yokai / best girl = the only harem member who actively pursues a relationship with MC
Nia = long straight black hair / cat yokai = NOT in the indoor bath, she enters the open bath w/ Kirue, says 'nyaat' on pg 16
The person in the indoor bath = no idea
What I really want to know, is who the hell are the bald monk and short-haired monk girl at the beginning? They seem to be important to the story, but I have no idea who they are supposed to be any more.