Mikage Shinohara
Mikage is a student of an unnamed prestige school. During her time as a junior high school student, she was once a ringleader of a group that tends to bully Marika after her month long absence and her being an outcast in class. After ten days of continuous bullying, Mikage and her group were trampled upon by Marika single-handedly as she took control of the entire school from the shadows. For unknown reasons, Mikage grew fond of Marika and took the role of being the "big sister" for the latter.