Don'yorinnu is a jelly-like creature with a blob-shaped body in shades of purple, lighter-toned "hair," and a small bow hairband on the left side. She's got stubby arms, slightly full lips, and round eyes with downturned lashes.
Personality-wise, she's genuinely nice and easygoing—the type to seek out her husband Honoboono after a fight to make things right. What's interesting is that despite her goofy appearance, she has a real conscience; she felt genuinely guilty about nearly wrecking Keita's parents' relationship. In the anime, she and Honoboono are shown enjoying shopping trips and vacations together, which seems to be her main interest outside of their life together.
She has a speech quirk where she tacks "-juban" onto the end of her sentences in the Japanese version, or says "no filter" in the English dub.
The weird part about Don'yorinnu is her aura. It actively messes with the emotional vibes around her, making people more prone to arguing. Around married couples specifically, it's even worse—it can turn minor disagreements into serious fights or even push couples toward divorce. The only thing that stops this from happening is Honoboono's aura, which cancels hers out whenever he's nearby.
Content compiled by AnimeList.moe from publicly available sources.