Karen Plankton
Karen Plankton is one of the two Central antagonists (alongside SpongeBob SquarePants) of SpongeBob SquarePants. She is a waterproof supercomputer who lives in the Chum Bucket laboratory. She is Plankton's wife and sidekick to steal the secret formula of the Krabby Patty. Karen's name is based on Hillenburg's wife Karen Hillenburg.