Rio's the quiet type—the kind of person who doesn't really have a tight friend group. She and Akechi Kei are classmates, though they didn't start out particularly close until Kei stumbled on her secret hobby.
Ever since childhood, Rio's been obsessed with manga. She'd spend breaks copying artwork from her favorite series, teaching herself the craft piece by piece. It was less a casual interest and more a genuine dream—she wants to be a mangaka. For a while she kept this to herself, sneaking off to the library during breaks to work on her stuff undisturbed.
That all changed when Kei found out. It was kind of a turning point. With someone finally knowing about her passion, Rio started opening up more, becoming noticeably more confident over time. The two started working closely together, with Rio bouncing ideas off Kei pretty regularly. And somewhere along the way, their dynamic shifted into something more complicated than just classmates helping each other out.
Content compiled by AnimeList.moe from publicly available sources.