Hachiouji is Kuroto Nakano's only friend from college. He is a natural lady-killer and has spirit sight. He acts on his whims quite often and would drag Nakano around for surprise trips during their time in college together. He does not question Senko's ears and tails when they first meet after he tries to surprise visit Nakano.

Spoiler

It is revealed that he became Kuroto Nakano's friend out of concern about his miasma from the curse

Spoiler

He practices exorcism as a hobby and started banishing evil spirits with Shiro leading to rumours of them