List of SpongeBob SquarePants characters
Karen Plankton is a talking computer who is Plankton's helper, sidekick, and wife. She gives him his evil plans to steal the Krabby Patty recipe. She lives in the laboratory of the Chum Bucket which is labeled from the outside as the "kitchen." Karen does not have a face, but her screen shows a wavy green line that moves when she talks. She is voiced by Jill Talley.