Erica is Allie's best friend, along with Sophie, Rosemary and Caroline's best friend.
Looks
It is mentioned in the series that Erica has blonde hair, but the rest is unknown,
Personality
Erica is very nice, and can't stand lying or being mean to people, even Cheyenne (except in book 3). She loves gymnastics and cats.
Classmates
Friends: Allie Finkle, Caroline Wu, Sophie Abromowitz and Rosemary Dawkins
Enemies: Cheyenne O'Malley