Yomogi is the mother of Uri and Retasu Midorikawa, and the wife of Eizaburou Midorikawa. Their children are students. The family live together in an apartment in Tokyo. Yomogi and Eizaburou are both professors, or teachers. The entire family is unaware that Retasu is a Mew Mew.
Yomogi has very dark green hair, that she has in a long plait. She wears large round glasses, like the other members of her family.
Not much is revealed about the personality of Yomogi, as she was only in one scene, but she is supportive of Retasu. When Retasu was younger, and friendless, Yomogi always encouraged Retasu to be herself, and someday, she would have real friends (who are the other Mew Mews, though in Mew Mew Power, Retasu is still friends with the three Beckys also).