Cassie is a friend of Marnie Piper and a character from Halloweentown High. She was also a witch like Marnie.
She was captured by the father of Ethan Dalloway, Edgar. While Cassie was trapped, she was stuck in Ethan's mirror phone. During at the mirror, Ethan was shocked when he saw her in his mirror phone. She was locked up by at the club when she heard a metal creek inside and also opening the knight mask. Then she disappeared out of nowhere.
Cassie was also a friend of Ethan Dalloway for a very long time ago. Ethan felt upset when Cassie vanished.
- Despite being a witch, she is not shown using her powers.
- She is the only transfer student from Halloweentown High not to wear a magical costume.