Fushimi

Fushimi is Professor Shouko's underling. Even though he has a dry personality, he is very serious toward his work. And so, he is loyal to even someone like Professor Shouko.

[Spoiler] He is actually a member of the Shrine organisation. He provided the Shrine technology to Kurama, which helped a lot in maintaining the City Through the Looking Glass. [/Spoiler]

(Source: Kyousou Giga Manga)