Mirei is a young woman with an impressive physique, featuring dark brown skin and long blonde hair that reaches the ground. Despite her stern and unapproachable demeanor, Mirei has a kind heart and enjoys cute things. She's brave and lively, never shirking from what she believes is right. As a Liberator, Mirei wields an S-Class power. Due to her reserved personality, many people are unaware of her past.