A childhood friend who's been walking to school with Etsuko since they were little kids. She's the type who's naturally cute and drew boy attention even back in elementary school—the kind of girl who just has that appeal. Hime (that's her nickname) has the personality to match: genuinely cheerful and able to chat comfortably with pretty much anyone. She's basically the social glue that keeps Etsuko from disappearing into herself, regularly dragging the more introverted Etsuko along into whatever's happening.
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