Satsuki Matsumae (松前 皐月, Matsumae Satsuki) is the wife of Ayato Matsumae and the mother of Ohana Matsumae. She is a struggling novelist and journalist who soon enough elopes with her boyfriend to evade his debt. She leaves Ohana in the care of her mother, who claims to have disowned her daughter. She neglected Ohana as a child and raised her with the mentality of "relying only on yourself".
After some time though, Satsuki returns to Tokyo, after separating from her boyfriend. She also takes some responsibility of Kissuisō by offering unnamed help through the magazine articles and by directly assisting the staff there.
- Satsuki's least favorite food is broccoli.