Cassie is a friend of Marnie Piper  during Halloweentown High. She was captured by the father of Ethan Dalloway, Edgar Dalloway. 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 also a witch like Marnie. 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.