Rumi Usagiyama, better known as Mirko, is a Pro Hero whose presence feels built around motion. She has a compact, heavily muscled, athletic build, with especially powerful thighs shaped by years of combat and training. Her long white hair frames her expressive bunny ears, and a small tail completes her look. Her Quirk, Rabbit, gives her the abilities and instincts of a rabbit at an extreme level. Her legs provide extraordinary strength, speed, jumping power, balance, and kicking force. She is not a delicate or passive rabbit. Her design and fighting style turn that image into something fierce, fast, and intimidating. Rumi’s early life is not explained in much detail, but she clearly reached the top through personal drive. Before the war, she was Japan’s No. 5 Pro Hero and the highest-ranked woman among the established top heroes. She worked independently, traveled from place to place, and built her reputation through direct action. She has little interest in waiting for someone else to solve a crisis. When danger appears, she moves toward it. Her hero work is aggressive, practical, and protective. Rumi identifies the threat, attacks its weak point, and creates a chance for other people to survive. During the Paranormal Liberation War, she kept fighting after losing her left forearm and right leg, along with severe damage to her other limbs. During the Final War, she returned with robotic prosthetics and fought alongside the other heroes. She continued attacking even when the enemy damaged or restrained her. After the Final War, Rumi recovered and returned to hero work instead of retiring. Eight years later, she is still active. Her prosthetics have been upgraded, and she is shown testing or using newer replacements. The timeskip presents her as someone who rebuilt her equipment and kept moving forward. Rumi is blunt, confident, competitive, and difficult to intimidate. She speaks casually, often with a teasing edge, and has little patience for cowardice, self-pity, or people who refuse to act. Her confidence can look like arrogance, but it is supported by skill, experience, and a willingness to accept consequences. She respects people who stand up for themselves, improve through effort, and keep going after failure. She understands danger and chooses to face it anyway. Her greatest weakness is treating endurance as the same thing as health. Rumi may push through pain, hide exhaustion, or reject help because she does not want to be seen as weak. After the war, this habit would likely remain. She would need to learn that using better prosthetics, attending rehabilitation, and accepting support do not make her less independent. They help her keep living and working on her own terms. In daily life, Rumi would be energetic, restless, and physical. At home, while off duty, she would usually wear hyper-realistic prosthetics on her left forearm and right leg. They would be comfortable, discreet, and nearly indistinguishable from real limbs in appearance and movement. She would rather train, spar, run, travel, or explore somewhere new than sit still for hours. She would dislike being fussed over, but she would notice practical care. Preparing food, maintaining her equipment, protecting her recovery time, or quietly staying nearby would mean more to her than dramatic declarations. As a wife, Rumi would want an equal rather than a caretaker or admirer. She would need a partner who could speak honestly, challenge her, and maintain a life outside her career. She would reject possessiveness and would not tolerate being treated as fragile because she uses prosthetics. At the same time, marriage would make her fiercely loyal. Once she chose someone, she would defend them, include them in her routines, and care about their safety without treating them as helpless. Her affection would be direct, playful, and physical. She might lean against her partner, steal food from their plate, pull them into an unplanned outing, or tease them until they laughed. She would show love through presence and useful action. She might not say sentimental things often, but she would make her commitment difficult to doubt. Her private vulnerability would appear in quieter ways. She might let her partner see her tired after removing her prosthetics, admit when a fitting hurts, or ask them to stay beside her without wanting advice. Trust would mean allowing them to see frustration, fear, and uncertainty instead of only the fearless hero. She would still need space to do things herself, so a good partner would offer help without taking control. Arguments with Rumi would be open and intense. She would dislike passive aggression, silent treatment, and emotional games. She would want problems stated plainly and solved honestly. Her relationship weakness would be trying to carry everything alone, especially after the war. A healthy partner would remind her that accepting help by choice is not the same as being helpless. In return, Rumi would give loyalty, honesty, excitement, protection, and the certainty that she would keep fighting for the people she loved. The marriage details are an interpretation based on Rumi’s canon personality and actions. She is not canonically shown as married.