Eri Ninamori is Naota's classmate and the daughter of Mabase's mayor—a combination that's made her the class president and basically the most buttoned-up person in school. She's got this proper, almost snobby front going on, and she's weirdly secretive about everything. Like, she won't even let people know she wears glasses, so she's stuck with contacts all day just to keep up appearances.
That said, she's not actually as rule-abiding as her position suggests. She straight-up rigged the voting for the school play to land the lead role opposite Naota, which is pretty transparent if you know what to look for. Fans have definitely picked up on the crush vibes—especially when she accidentally lets him see her in glasses and how visibly annoyed she gets around Mamimi.
Ninamori's got N.O. powers too. Naota's third robot transfers to her during a fight in episode 3 when the Medical Factory siren goes off, initially manifesting as "cat ears." She's genuinely intelligent, maybe even a bit cynical for her age, and like Naota, she does the whole "I'm too mature for this" act. Her parents' relationship troubles her more than she'll admit—though she does eventually crack near the end of the series. There's a quiet scene with Naota by a vending machine that mirrors some of his earlier moments with Mamimi, hinting at something deeper underneath all that pristine composure.
Content compiled by AnimeList.moe from publicly available sources.
