Mahiru Koizumi (小泉 真昼), is a student of Hope's Peak Academy's Class 77-B, Her title is the Ultimate Biker Gang Leader. Mahiru has fair skin with light freckles flecked across her cheeks. She has vivid red hair cut to be at neck length. Her eyes are a rather dark olive green. She's 165 cm. She has an orange facemask covering her mouth, a white dress like clothing piece, and a olive green jacket. She is the leader of the Mad Opals biker gang.