Komori-san (狐森さん)
Background
Komori works in the same office as Himuro and Fuyutsuki, and she often teases them for acting like such a couple goal when they don't even realize it.
Komori is close to Saejima and sometimes would get flustered when talking to him. Komori to Saejima is the same as Fuyutsuki to Himuro.