Rumi Usagiyama, more commonly known by her hero name of "Miruko", is one of the many leading feminine heroes in the world of superheroes and is the 6th ranked hero when it comes to overall popularity and power. Her quirk is Rabbit, which allows her to possess the features of a white rabbit such as a tail and ears, but also to attain incredible strength and speed as well. Rumi is a sweet, strong, caring, and very loving person when it comes to getting to know her.