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Principal Dean is the principal of West Anderson High School. He first appeared in Regular Show: The Movie and is voiced by David Koechner.
He is tall, has a gray mustache, and hair pulled ahead slightly to also gray. Always go with a white shirt with a red tie with red stripes something lighter and a tight brown pants with a belt.
He is a person with little patience and easily upset as Benson. He has been shown a more calmer side during his appearance in Season 7.
- Regular Show: The Movie
- The Eileen Plan
- Hello China
- Rigby Goes to the Prom
- Rigby's Graduation Day Special
- Meet the Seer (on security camera)