Unfailing cheerful, Mitoto Kuramitsu is the daughter of Minami Kuramitsu, as well as the mother of Mihoshi and Misao Kuramitsu. Mitoto works as sanitation engineer (read: cleaning lady) for the Galaxy Police. She met Seina Yamada when he was first taken from Earth to the G.P. Academy, and was taken by Seina's hair, which she constantly pets. Since then, Mitoto would be occasionally popping into Seina’s life from time-to-time, often helping him out during certain events in the boy’s life (like the time Seiryo Tennan held up Seina’s body enhancements so that the boy could wash-out, where she supervised Seiryo in cleaning toilets).

Mitoto shares certain traits with her daughter Mihoshi, namely her odd luck and carefree, yet clueless attitude. Also, Mitoto seems to have the odd habit of appearing in places where you least expect her to be; sometimes on a G.P. battle cruiser or a pirate ship, where she would be cleaning away without a care in the world.

There is a running joke that she knows almost everyone in the galaxy because she cleans for them. She as even been in General Daluma's "secret" fortress, and remarked on the cleanliness of its floors.

Other than appearing in the GXP series, Mitoto also made a brief appearance in the final episode of the third Tenchi Muyo OVA series, when she approved of Misao's proposal to Mashisu Makibi and had convinced the Kuramitsu family council to approve of the wedding.