"You mean the person who raps the moring announcements? 'Word, have you heard? If you miss attendance, your gonna lose your independence'?" Hay Lin on Principal Knickerbocker in FramedPrincipal Kate Knickerbocker is the principal of Sheffield Institute, where the Guardians go to school on Earth. Ms. Knickerbocker takes her job very seriously, and can be quite strict, but has a kind and jolly nature underneath. Her first name was revealed in issue 114.