Miu is a young girl of short stature with straight, shoulder-length light hair, worn up in a high ponytail on the left side of her head with a straight side fringe falling above her right eye. She has stern, dark eyes that sometimes appear to tilt slightly inwards, giving her a more aggressive appearance than her twin.
Miu's idol costume is identical to Yu's in design, consisting of a knee-length, sleeveless dress with a pointed skirt and a thick collar around her shoulders, a large feather decorating it to one side, tights, and one long glove covering her arm. What sets them apart is the fact that Miu's costume is designed to be the mirror image of Yu's, as its design faces the left where Yu's faces the right, and that the colors are also flipped, as the bodice of Miu's dress is paler and the skirt darker than that of Yu.
When forming the FeatherHATS with Pop☆Step, East Naruhata High Dance Squad and the Mad Hatters, Miu also wears a small tophat on the right of her head, a small feather poking out of one side. During training, Miu wears a plain tracksuit with pale lines running down the sides of her arms and legs.
After the time skip, Miu let the pigtail grow, now being much longer than his sister's and ending in a ringlet. Unlike her sister Yu, Miu doesn't wear glasses.
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.
Singing Talent: 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.
- According to Betten Court, Miu and her sister were originally going to have a more similar design to Pop☆Step, with wings on their backs.
|My Hero Academia: Vigilantes|
|Vigilantes||Naruhata Vigilantes (The Crawler • Pop☆Step • Knuckleduster) • Stendhal|
|Allies||Ichimoku Samazu • Jube Namimaru • Makoto Tsukauchi • Moyuru Tochi • Rapt Tokage • Soga Kugisaki|
|Heroes||Air Jet • All Might • Best Jeanist • Bigshot • Burnin • Captain Celebrity • Compass Kid • Death Arms • Edgeshot • Endeavor • Enigma • Eraser Head • Fat Gum • His Purple Highness • Ingenium • Kido • Loud Cloud • Midnight • Mirko • Mister Blaster • O'Clock II • Onemu Shinya • Onima • Present Mic • Ryukyu • Snipe • Thirteen|
|Organizations||Buster Union • Endeavor Agency (Flaming Sidekickers) • Police Force (Monika • Naomasa • Eizo) • Midnight Boys • Purple Revolution Agency • Team Idaten|
|Villain Factory||Queen Bee (Kuin Hachisuka & Bee☆Pop) • Mario Kugutsu • Hina • Number 6 • Instant Villains (Akira Iwako • Junkie Villain • Ryuichi Gojiyama • Monster Cat • Eiji Okameda • Rikiya Eno) • Next-Level Villains (Teruo Unagisawa • Kirihito Kamachi • Bat Villain • Octoid • Tommy S. Gordon • Willie Wanda • Bombers) • Anonymous|
|Other Villains||Three Sturm und Drang Brothers • Stendhal • Emperor Yotsuura • Ichiro Hotta • Jiro Hotta • Mazinger Brothers • Suicide Bomber • Abegawa Tenchu Kai (Rojiya Yonenaga • Tetsu • Haruhisa • Soji) • Robber Villain • Drunk Lee • Master Beast • The Rapper|
|Others||East Naruhata High Dance Squad • Feathers (Miu • Yu) • Mad Hatters • Pamela • Sisters of Saint Lila's Academy • Shoko Haimawari|