Also, LW, in addition to the racism (which would be more than enough reason to leave on its own)

On many embarrassing occasions she has refused or made a scene about putting on a mask

is ableism. She would rather risk giving someone a disease that could kill them or give them a lifelong disability than wear a mask.

This suggests a deep level of selfishness and lack of empathy towards all humans,

and also suggests that she will not be kind to you if you become sick/disabled as you age.