She will bite just to see how 'the victim' will react. If the 'victim' is not phased, she will be your friend. If you jump or are scared, she has all of the power!
If the doorbell rings my two girls scatter, except for Motley, she'll come out if it's my mom. If it's my sister, Motley will make her presense because my sister is allergic to cats and she doesn't like Motley (for no reason). So Motley will just prance by her making her sneeze and rub her eyes. Is it possible cats can hold grudges against those who don't like them for no reason, other than being a cat? LOL!