Mandy is the overall titular deuteragonist of the Cartoon Network TV series The Grim Adventures of Billy and Mandy.




She is Billy's best friend and neighbor. Unlike Billy, Mandy is intelligent.


In Billy & Mandy Save Christmas, she does not believe in Santa Claus until she, along with Billy and Grim, travel to the North Pole, where they learn that Santa was bitten by a vampire. In an attempt to get Santa to revert back to normal, Mandy sings "Up on the Housetop".

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