冷病娇
[lĕng bìng jiāo]
The term 'Cold Sick Yandere' combines 'yandere', which comes from Japanese culture describing people (often portrayed in anime, manga or other visual media), usually female, who starts out kind-hearted and gentle toward a particular love interest but becomes violent or possessive, even psychotic because of the extreme obsession they have for them, and the 'cold' emphasizes this persona's icy, distant nature.