Tomoko is Taro Sado's mother who is very protective of her son to the point where she would conspire with Shizuka even though she is her "rival" to Taro's heart whenever a girl comes into his life besides them. She is obsessed with Taro in protecting him and comically sometimes joked to the point of bieng infatuated with him. She adds the "-san" suffix to both her children's names.