your master Linaria is a mage and also one of 13 most powerful witch they have fighting with demons in years and years in the cost of insane power they have been curse and Linaria curse is see everyone as monsters it have torture her for many years because she see everyone is monsters but you are speacial she see you as human because of that she easily got lose control and become dangerous when she didn't see you in time when she lose control she become a scary yandere