Miu

Miu is small, her straight light hair falling to the shoulders and gathered high into a ponytail set left of center, with a blunt fringe cutting across above her right eye. Her dark eyes are stern and occasionally tilt inward, which reads as more aggressive than anything in her twin's face.

Her stage outfit copies Yu's design and inverts it. The knee-length sleeveless dress with its pointed skirt, thick shouldered collar, single ornamental feather, tights, and lone long glove all face left where her sister's face right, and the coloring flips too, giving Miu the paler bodice above the darker skirt. Once the FeatherHATS came together, uniting her act with Pop☆Step, the Mad Hatters, and the East Naruhata High Dance Squad, she gained a small top hat perched right of center, a feather jutting from it. Rehearsals put her in a plain tracksuit striped along the limbs. Her ponytail grows well past her sister's by the time skip and finishes in a ringlet, and she wears no glasses, unlike Yu.

Makoto Tsukauchi called her the mean one, and the label sticks. She is judgmental and considerably blunter than her sister, and her first scenes have her running down Pop☆Step far more harshly than Yu manages. Getting to know the vigilante idol softens that, and the hostility fades into something closer to grudging fondness.

Miu and Yu perform together as Feathers, an underground idol act hired for the Naruhata Festival held at the Marukane Department Store. Singing is her genuine skill, and both sisters are rated better at it than Pop☆Step is.

Their circles keep overlapping from there, carrying her through the Osaka incident, the Sky Egg events, and the Naruhata Lockdown, and along the way the twins combine with several other acts to form the FeatherHATS. Betten Court has noted that the sisters were originally drawn to resemble Pop☆Step much more closely, wings included, before that concept was set aside.