I agree, she doesn't look like a purebred crested. Their hair is normally straight, with a double coat and much more like a veil. Her's looks like poodle hair. She is also more in a poodle cut, or at least someone gave her poodle feet. If you want to keep her in correct powderpuff coat find a groomer that knows what they are doing and won't do poodle feet on her and can do her face and ears well.
Regardless of whether or not she is purebred she is really freakin cute! So glad she and Cinder have become best buds!
Here is a picture of a powderpuff crested for those who are interested. They have hair on their entire body. The hairless crested is what a lot of people think of when they think of the breed. They are the ones with no hair the body and plumes on the head, tail and feet.
I am looking to get a hairless crested in a few years to show and love the breed.