Fredrick is Karen's father, only shown in the December 2009 issue of Nick Mag, previously called Nickelodeon Magazine. The character is disapproving and does not think Karen should have ever married Plankton. His interests and hobbies include drinking virtual cups of English tea and saying "I disapprove of this".
Fredrick is Karen's father, almost angry at all times. His only known friend is his daughter Karen.
Fredrick is silver. He has a black screen with green eyes and a green mouth. Appearances Fredrick has only appeared in the December 2009 issue of Nickelodeon Magazine.