Aoi Kunieda
She's the wife of the Great Demon Beelzebub and mother to their three kids: Kanan, Miel, and Miltie. Despite her position as a demon's wife, she's known for being pretty shy around any guys who aren't her husband—to the point of genuine fear. It's a quirk that doesn't really match her otherwise confident demon royalty status, but fans find it endearing.
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