Atsuko Okamura (Senoo by marriage) is the mother of Aiko Senoo. Ex-wife to Kouji Senoo. A nurse working at a retirement home. She had divorced with Kouji while Aiko was little and seemed very hurt when Aiko distrusted her and decided to stay with her father. However, Aiko still visits her over the course of the series and she has many mentions despite not appearing in many episodes. At the end of the series she gets back together with Kouji.