Karen Plankton

Karen Plankton is a major character in the show. She is married to Sheldon Plankton and often assists in his evil schemes.

Appearance
Karen is a computer. She usually manifests herself on a huge blue and black computer screen with a green line to show her mouth and/or eyes, emotions. Sometimes she will be a large screen on wheels, that's in her mobile form.

Personality
Karen is a computer and so she is smart. Plankton usually takes credit for her ideas on how to steal the secret formula. She is pretty evil but sometimes can be convinced to be good for a little bit.