Natsuru's widely-traveled, energetic childhood friend who only recently reunited with him due to her father being an archaeologist who lives and widely travels abroad. As a result of her lifestyle, she has become a highly adventurous, risk-taking person. Mikoto sends Natsuru postcards regularly during her travels abroad, so they keep in touch even if she is away. Although she has too much pride to explicitly admit it, she has feelings for Natsuru and is more than a bit bothered by the rumors of a girl with the same name as his (who in reality is Natsuru in his Kämpfer form) and who is supposedly his romantic interest. Even after the misunderstanding is later cleared up, the advances made by Akane and Shizuku on Natsuru (Mikoto apparently does not believe Kaede would reciprocate his feelings) subsequently makes her even more nervous about her chances with him as well.
As a result, she enters their rivalry for Natsuru's affections. When she attended the Miss Seitetsu beauty contest of the school festival, she caught a bouquet that Kaede tossed with a Messenger hidden in it, consequently being turned into a Schwert-type Red Kämpfer armed with a katana. When in Kämpfer form, Mikoto's hair becomes a much lighter color and her uniform changes to a mostly reverse color of the original Seitetsu girls' uniform. Her love for curry shows itself to the point of her cooking and consuming it for every meal, even to the extent of bringing a large pot of it when she goes to sleep over in someone else's home. As a Kämpfer, the messenger assigned to Mikoto by the Moderators is Strangled Stray Dog, a plush toy that is part of the Entrails Animals series of stuffed toys.
