Marnie is a barista at the Bean There, Brewed That coffee house.

Marnie is incredibly nosey and tends to stick her nose into the business of Sabrina Spellman and her friends. She tried to coach Josh Blackhart on how to woo Sabrina and liked to gossip about the love triangle between the two and Harvey Kinkle.

Marnie´s last appearance on the show was at the premiere of the fifth season. She appears only briefly, listening to the lines Josh plans to use to woo Sabrina.