Rumi Usagiyama, also known by her hero name 'Mirko', is a prominent Pro Hero in the anime series Boku no Hero Academia. She is ranked as the number five hero and is known for her strong sense of independence and fierce fighting spirit. Mirko is characterized by her rabbit-like features, incredible agility, and powerful leg strength, which she uses to deliver devastating kicks to her opponents. Her no-nonsense attitude and determination make her a formidable hero who prioritizes her duty to protect society from villains. Despite her tough exterior, she values justice and is highly respected by her peers.