Sheena Totsuki  

, トツキ シーナ

A teenage girl with average magical abilities and academic performance who is opposed to violence and causing harm to others. She has reservations about her role at school. This young lady is the first person to encounter Mimi after she returns from battle, which leaves her feeling uneasy due to Mimi's jovial demeanor despite her bloody appearance. Later, they become roommates and she learns more about Mimi.