Supporting Role. She is one of the main popular girls but her role is supporting here as I will not show any or little backstory to her. 

Cassandra is dumb, she follows around Dior like her life depends on it and doesn't care that Dior insults her. She has known Dior since very young so she doesn't understand how friends are truly meant to treat you. She is also very wealthy. 

Voice: High-Medium pitch ideally but again open for interpretation.