Tofu Person
Tofu Person: A person who absorbs the personality and interests of the people around them like tofu absorbs the flavor of the food it is cooked with. They usually do this because they lack a personality of their own, and they will often forsake their previous persona for a new one at any given moment.
Ashley Robichaud is a tofu person. Sure, she'll preach to you about how important it is to be a good friend, but tomorrow she will stab you in the back and try to drive all your best friends away from you.