An affable Tyrannosaurus Rex, usually addressing Earl as "Pally Boy," Roy is known to Earl's kids as Uncle Roy. Roy is a bachelor, and has a serious crush on Monica DeVertebrae. He also briefly dated Earl's sister, Pearl. David Greenaway puppeteered Roy's face. Pons Maar, Roy's suit performer, operated the huge head (held high above his own) from inside the suit, using a small monitor to see the outside world. Roy's tiny animatronic arms were operated with an arm rig by Julianne Buescher.
Roy also occasionally visits to play chess with the Sinclair family.