Akari is Rio's blunt step-sister. She's had a few relationships over the years, and she definitely doesn't go for the "good-guy type."
Before everything else, there was an older boy from her neighborhood she was genuinely into—the kind of thing that sticks with you. When he didn't end up giving his bracelet to his girlfriend, Akari kept it. Yeah, he threw it away, but she grabbed it anyway. That's the kind of person she is.
Things shifted when she moved into an apartment near Yuna's place. She and Yuna became close friends pretty quickly, and that's when Akari ended up falling for Kazu, who'd been Yuna's childhood friend. It's one of those messy situations where feelings don't always line up the way you'd hope.
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