Karen uses her mind-control abilities to enslave the citizens and is one of the only townspeople not to be a slave. Krabs to watch the town descend into evil and be killed by King Neptune, and sending a hitman to murder SpongeBob and Patrick. This plan involves enslaving everyone in Bikini Bottom, forcing a frozen Mr. They are in a descending order from harmless to sinister, the worst being "Plan Z" - the only scheme to result in Plankton successfully stealing the formula and using it to his advantage. Since she writes the majority of his plans, it can be assumed that she wrote these as well. In The SpongeBob SquarePants Movie, it is shown that Plankton has a filing cabinet of evil plans that Karen reminds him about. Karen normally acts like a nice and loving person when she and Plankton are in a good mood, but she is also evil enough to be a villain (possibly more so than Plankton). Her father is an outmoded computer named Fredrick, who has so far only been seen in an issue of Nickelodeon Magazine.
In Single Cell Anniversary, Karen's AI mother is revealed to be a software program named EMILP. This was first hinted when Plankton told her "Your parents must have been like, part computer or something.". The further depth of Karen's early life is debatable, since she has two parents. They first met and dated before Plankton became evil. She was built by Plankton himself out of a calculator, a mass of wires, and a security system. Karen is a Mark II Surplus UNIVAC with 256 gigabytes of RAM.