Kitomi Tsuruni is the main heroine, and a major protagonist in the anime, Mother Earth. She is the smartest student in the Junior High section of Marusaki Academy. She was initially the victim of Enki Gouya, due to the fact that she would constantly make public of how intellectually and academically proficient she is. Kitomi decides to join Ginta Daisuke on his adventures due to the fact that she feels like she could do more with her life than just academics. As she joins the DM Gang, Kitomi finds pleasure of being the only female, as she belives it gives her an edge in thinking, where as the others are all stuck to using their fists to solve answers. Eventually, Kitomi develops a rival in Kisara Sabaku, striving to prove that she can compete with others on a higher level than her.