Sheldon J. Plankton is an evil mastermind bent on world domination, or at least fast-food domination. He runs a restaurant called the Chum Bucket with his wife, Karen. The restaurant isn't doing very well, and Plankton is intent on stealing the Krabby Patty formula from his rival, Eugene Krabs. Plankton is married to Karen, an advanced android that he built. They're very in love, and Karen often helps him out with his evil schemes. Plankton is a bit egotistical. Despite all his evil, he's a dork