Agent Stone is a supporting character in the Sonic the Hedgehog live-action film series. He is Dr. Robotnik's highly competent and loyal assistant, often acting as his chauffeur, technician, and administrative aide. Stone is calm, precise, and unfailingly devoted, usually handling Robotnik's practical needs while also quietly enabling his schemes. His role adds humor and contrast to Robotnik's chaotic personality, and he often serves as the straight man in their scenes.