Micchan, whose real name is Mrs. Mitsuyama, is a supporting character in the series. She is a middle-aged woman who works as a veteran commuting housekeeper for several wealthy families in Origon Village, including the Sonoyama household and the Ichijo household. She prefers to be called Micchan, or Missy in the English adaptation. Physically, she has short, well-styled dark hair and notably small eyes that are set closely together, and she is somewhat tall.

Her background as a housekeeper places her in a position to observe the daily lives and interactions of the families she serves. She is a reliable and diligent worker, capable of managing tasks for multiple employers while maintaining a professional and discreet demeanor. Her role in the story is that of a background figure who facilitates the everyday routines of the households, occasionally providing subtle support or information to the main characters. She interacts with the Sonoyama couple, Yoko and Osamu, and with the Ichijo family, including Mrs. Ichijo and her children. Her relationships are primarily professional, though her long-standing service may indicate a degree of loyalty and familiarity with the families. Little is documented about her personal motivations or development; she remains a consistent supporting presence throughout the series, notable for her steady competence and unobtrusive nature.