Who is Mavis Freestone from Immortal in Death and what is their importance?

Mavis Freestone is Eve's funky friend, accused of murdering Pandora. She is not the kind of person to become so angry that she will lose control and murder someone. Her pattern of behavior is to try to placate people, which she did try to do by going to Pandora's home the night of the woman's death to plead with her to be nice to Leonardo, which only instigates a cat fight between the two women, where Pandora scratches her neck with her very sharp claws