Sagano

A mysterious man with elaborate facial markings who casually dons what appears to be a bloody fox tail muffler. Sagano seemingly knows a good deal about both Yue’s identity and the source of Yue’s troubled dreams, but he discloses no information. Sagano is often seen with a cold smirk on his face. Kurogitsune notes that the only time Sagano doesn’t appear dangerous or threatening is when he's eating.

Spoiler

His real name is Tsubaki Akashi.