Together with her sister, Yu, Miu makes up the underground idol duo, Feathers, that was called to perform at the Marukane Department Store Live Event. As having been fitting labelled "the mean one" by Makoto Tsukauchi suggests, Miu is very judgmental and can be a lot more rude than her sister, Yu. When first introduced, she's seen gossiping about and belittling Pop☆Step much more harshly than her twin, although, as she befriends and becomes closer with the Vigilante idol, this mean outlook towards her does change. As she is part of an idol duo, Miu possesses a great skill for singing. Both her and Yu have been noted to be more skilled at the art than Pop☆Step.

My Hero Academia: Vigilantes
Living in a superhuman society, it's hard to feel special. Even more so when the spotlight only shines on professional heroes, those legally authorized to use their special powers known as "Quirks" in public for the greater good. Kouichi Haimawari grew up aspiring to be a hero, but with a mediocre Quirk like "sliding" that ties him to the ground, he soon came to the conclusion that he could only ever admire them from below. Despite this, Kouichi finds contentment in using his Quirk to carry out day-to-day good deeds, such as returning lost items and helping the elderly cross the street. However, Kouichi's tame life takes a swing into the turbulent when he is rescued from a back alley brawl by "Vigilante," or illegal hero, Knuckleduster. Seeing hero potential in Kouichi, Knuckleduster enlists his help in tracking down the source of a dangerous drug known as "Trigger" that boosts the user’s Quirk at the expense of their rationality. Set in a time before the events of the original story, Vigilante: Boku no Hero Academia Illegals follows Kouichi as he chooses to don the reputation of a villain and become a Vigilante, operating in the shadow of the law to prevent crimes from taking to the surface.