Madoka

Madoka (円) is the best friend and classmate of Tokine Yukimura at Karasumori High School who thinks Yoshimori Sumimura is cute and the idea of he and Tokine one day becoming a couple is exciting for her that she encourages Tokine to get closer to Yoshimori, but Tokine doesn't always take her advice.

Personality
Madoka is always a supportive girl to Tokine Yukimura and she sees her as person who is always working hard on her own.

The Cute Kid
While Tokine Yukimura and Madoka are in the cafeteria, Tokine is approached by Yurina Kanda, who (again) mistakenly addresses her as Yoshimori Sumimura's older sister, which confuses Madoka. Tokine quickly excuses herself and drags Yurina away so they can talk in private. As Tokine later leaves school with Madoka, they spot Yoshimori waiting by the gate. He tries to talk to Tokine about their families cooperating with each other, but Tokine refuses to listen and drags Madoka past him. Madoka questions why Tokine ran off, since she thinks Yoshimori is cute and that he clearly likes Tokine. Tokine refuses to accept any of that and says that Yoshimori is just a middle school kid, but Madoka points out that kids all grow up one day, using her older brother as an example.

The Butterfly Incident
When Saki's Demon Illusion Butterflies invade the school, a large number of them are inexplicably attracted to Madoka and settle on her face, shocking Tokine Yukimura. Even after they are apparently frightened away by Tokine's shout, one lingers near the back of Madoka's head. Madoka asks if Tokine is okay, since she used the excuse of feeling sick to get out of class and deal with the butterflies. Tokine assures Madoka that she is fine and rushes off in a falsely bright mood, which only leaves Madoka confused.

All Grown Up
Madoka sees Tokine Yukimura walking to school with Yoshimori Sumimura and waves to her. They part ways with Tokine and Madoka heading to portable classrooms at the Karasumori site and Yoshimori to his classroom at Mikageyama Grade School. Madoka says that Yoshimori has grown up a little and Tokine agrees.

Tokine Yukimura
Madoka is Tokine's friend and classmate. Although Tokine's job as a Kekkaishi has resulted in some very strange interactions between them (such as Tokine reacting in shock when Madoka's face was covered in butterfly Ayakashi, which Madoka as a normal person was unable to see), they still seem to be rather close. Madoka is especially interested in Tokine's interactions with Yoshimori Sumimura and seems to have made it her personal mission to make them a couple. Tokine fights her on this nearly every step of the way, but Madoka has a certain knack for highlighting Yoshimori's good points.

Etymology

 * The name Madoka means "circle, yen, round" (円).

Trivia

 * In the anime, Madoka is replaced by Kirara Kawakami, because they largely have the same personality.