Miyu Okamoto balances life as a high school student and an enthusiastic idol, recognizable by her light brown twin ponytails secured with blue hair ties, blue-green eyes, and 162 cm stature. Her personality radiates cheerfulness and bubbly energy, making her a supportive presence, though she struggles with indecision and frequent tears. Despite self-perceived incompetence, she eagerly throws herself into diverse activities. Miyu works part-time at a Sendai maid cafe and passionately identifies as an idol enthusiast. As the first member recruited during late 2013 auditions for her group, she shares the role of mood maker with another member, consistently fueling the group's dynamics and collective spirit.

In a spin-off original net animation, Miyu is reimagined as an anthropomorphized falcon mascot. This adaptation recasts the idols as animals in a small, struggling zoo on Sendai's outskirts facing closure. Joining a new animal unit spearheaded by the head zookeeper and a breeder, Miyu the falcon contributes to revitalizing the zoo through promotional activities like leaflet distribution and themed events. Her falcon form aligns with her original eagle image animal designation, now specifically adapted for this narrative.