She's rich. She's spoiled. She's a snob.
She arrives to detention in a BMW.
Her dad tells her that skipping school to shop is not worthy of detention - he'll make it up to her.
She tells the teacher she doesn't "belong" in this place.
She wears a leather jacket and expensive clothes. She has neat red hair, and expensive looking boots.
She clearly thinks she is better than the other students. She is arrogant and obnoxious.
She's a princess. Not literally, but because she is "Daddy's Little Girl," and acts as if she should be given anything and everything she wants.