Yuki Aoba operates as the Battery Girl for Rabbit 2 in the resistance faction Arahabaki. Formerly a member of the underground idol unit Rabbit Foot, she stands as its sole survivor after the True Army incarcerates her peers. Publicly, she embodies a meticulously curated persona of bubbly charm and sweetness, a stark contrast to her private personality marked by bluntness, vanity, and a domineering attitude—particularly toward her assigned “manager,” whom she often belittles. This duality extends to her strategic online activity, where alternate accounts serve as tools to aggressively counter anti-fans, balancing image preservation with unapologetic retaliation.

Her dedication to idol culture originates from an authentic aspiration to ignite hope and nurture dreams among her audience—a drive that fuels both her performances and the Garanndoll’s Rabbit 2 mecha. The machine’s design channels her aesthetic: pink-hued, rabbit-themed, and adorned with plush-like drone weapons that mask its lethal efficiency. Though combat-ready, its whimsical appearance remains a direct extension of her idol identity.

A brief hiatus sees her adopt a disguise—glasses and a ponytail—to work incognito as a convenience store clerk, showcasing her adaptability. Despite this detour, she defiantly recommits to her idol path, refusing external judgment or oppressive censorship to dictate her ambitions.

Interactions with allies, including the protagonist and fellow Battery Girls, gradually temper her self-centered tendencies, revealing a capacity for collaboration. While her growth prioritizes reinforcing core traits over transformation, her narrative explores the friction between crafted identity and raw vulnerability, all while leveraging her public influence to aid Arahabaki’s struggle against authoritarian control.

No additional background details or expanded media involvements beyond her idol pursuits and resistance role are documented.