Kikuno Yamada

Aoi and Kirio's mother. Appearing emotionless she has trouble speaking with others due to overthinking, to the point that her children need a "Secret Mom Manual", given by their late father, to understand her. Aoi actually never read the manual she was given, hence causing the misunderstandings with Kikuno, before she ran away from home. She works as the other executive assistant, along side Minegishi, for the Takanashi siblings' mother.