『Sae Kisaragi』

Yuto, Rinko, and Himari's schoolteacher at Touryou High. A smoker and a pervert, she always seem to catch Yuto in an erotic act with a girl, and is passively supportive of whatever erotic acts the students do as long as they do it outside of class. Rinko sometimes call her"Sae-chan", which she detests. It is later revealed in the manga that Sae is actually an ayakashi who protects Takamiya from the shadows, and claims to be more powerful than Himari and Shizuku at her peak. She is also the one responsible for erasing the memories of the patrons at Café Relish, and is shown to have lesbian tendencies. It is still unknown what type of ayakashi Sae is.