Unlike many people think, Cassie is not short for Cassandra. The sweet and simple name suits Cassie perfectly. She is the daughter of Jane and Carlos. Their family is the owner of another one of Dude's puppies, Dudette. Cassie loves science and often helps Doug with experiments in his lab. She enjoys reading, photography, and playing chess. Despite her quiet exterior, Cassie loves to tell Sapphira, Adrian, and I stories and take pictures of us.