Michiko Sawada, known as "Mitchan," is Mitsuo Suwa's elementary school classmate. She harbors a romantic interest in the superhero Perman, unaware this identity belongs to Mitsuo himself. This dynamic creates an ironic tension, as she idolizes Perman while viewing the real Mitsuo unfavorably. Her feelings place her in direct rivalry with Perko (Sumire Hoshino), another Perman member. This rivalry occasionally escalates into clashes between them, often centering around Mitsuo. She attends school alongside Mitsuo and other key characters, positioning her within the series' main social circle.