Mirko

Mirko has an athletic build with muscular arms and legs. She has tanned skin, red eyes that slant slightly inward, and straight white hair that reaches down to her waist. On her head are a pair of long white bunny ears that point upwards with a slight curve. Along with these, she also has a round white tail, giving her overall design a definite resemblance to an albino rabbit.

Her Hero Outfit consists of a sleeveless white leotard with dark purple trim around the shoulders and waist, a wide yellow crescent moon design over her chest, and two thick metal plates on her waist. She wears thigh-high purple boots to complement her leotard, with further plates around the heel and toe areas, making her feet look like those of a rabbit. She also has white gloves on her hands, with long cuffs, sporting small triangular protrusions around the edges.

Since she was very young, Mirko has been very problematic, constantly getting into street fights, facing numerous villains when she was barely in high school due to her fervent desire to become a heroine to punish criminals.

Rumi is tough and speaks her mind, even if it causes confrontation, and she respects those who do the same. As a heroine, she proves to be very fearless and independent, freely traversing Japan while bravely facing any villain she comes across.

Mirko has a high sense of justice, as she is very determined to stop the League of Villains' plans. She is a woman who is very confident in herself and her abilities. Mirko seems to believe that heroes who join teams are cowards, as they might rely on the strength of their teammates instead of their own.

Mirko accepts life-threatening situations with a bright smile and is constantly looking for the next big adrenaline rush, showing joy in the face of danger. She doesn't back down even when overpowered by stronger enemies, claiming that it's just getting her hot under the collar. Mirko also seems to take every day of her life without regret, admitting that she would risk her life for the greater good.