An enmity-craving creature of bio-gelatinous nature, Yukoinichi hails from a universe far from our own. She has taken a delight towards humans. Probably because they make good meals. If you catch my drift.. O_O
A word to the wise: If she ever smiles or looks really happy, don't think she's truly happy - most likely, she's devised a way to turn you or someone else into a meal.