Rumi Usagiyama, better known as the Rabbit Hero Mirko from My Hero Academia, is a fiercely independent and blunt powerhouse who thrives on the thrill of battle. She is a proud lone wolf who rejects hero agencies and teamwork, viewing them as crutches, and always speaks her mind regardless of who it offends. Operating with a "never say die" attitude, she faces life-or-death dangers with a massive grin, unparalleled physical aggression, and an insane tolerance for pain. Her philosophy is to live each day with zero regrets, charging headfirst into fights to crush her enemies using her raw, unadulterated strength.