Mayumi Takahashi  

, 高橋真弓

Mayumi is a freshman at Sparta Academy. She's kind-hearted but somewhat naive, which sometimes results in poor grades. Despite this, she frequently finds herself in detention, where she endures embarrassing punishments. However, just when things seem dire, Kekko Kamen appears and rescues her. Mayumi is deeply grateful for her heroine's consistent interventions and often wonders about the true identity of the masked savior.