Mitchy was a pretty young heroine from the early days. She was the first female idol of Tezuka Osamu's Manga but was not merely a cute, doll-like figure. She appeared, for example, as the androgynous robot that can soar through the skies in "Metropolis", and as such became the prototype for the latter-day major star, Atom. Mitchy herself portrayed Atom's mother in the "Astro Boy" series. She was a character who could act the part of a robot and who could also turn in impressive performances in supporting roles as the mother of the protagonist; she can thus be said to have embodied the spirit of an actress in no small part. Moreover, she was not only the prototype for Atom she was also the model for Sapphire, the star of "Princess Knight". In other words, it would be no exaggeration to say that without Mitchy, the world of Tezuka Osamu would not be the lavish place it is today.