Rea Katagiri is a dedicated secretary of Reito Mizuhara.

Rea has hatred towards men. This behavior leads to the mistreatment of the second man, Reito Mizuhara. Upon first seeing Reito, she believed he pushed down the researcher Maria Kuroda but it was Maria who ran into Reito. Because of her hatred towards men, Rea has solely been in love with women, specifically Mira Suou. For the amount of time Rea has known Mira, she has developed intimate feelings with Mira, always having the need to touch Mira and compliment her beauty.