Mandy (voiced by Grey DeLisle) is a major character in The Grim Adventures of Billy and Mandy. She is a cynical and arrogant girl who is (somewhat) friends with Billy and Grim. She abuses Grim the most and treats Billy like a servant. Mandy is smart and loves absolute power, order, chaos and control, which is something she uses to make Grim her obediant servant and slave. She almost NEVER smiles and denies it whenever she does. Mandy usually gets what she wants and doesn't hesitate to speake her mind. Despite her usually cold, dormant and pompous demeanor, she has from time to time been helpful and shown some general concern for Billy and Grim.