Yukiho's the younger sister of Kousaka Honoka—and basically the only one who has to deal with her. She's always giving Honoka a hard time, but it's pretty clear she actually cares about her, even if the teasing gets relentless. When she's alone, though, she's prone to doing some genuinely embarrassing stuff that would mortify her if anyone found out. The anime shows she's got a solid friendship with Arisa, Eri's little sister, which adds another layer to her social circle.
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