Urnus was a faun who lived in Cair Paravel during the reigns of Caspian X and Prince Rilian. He was a member of Caspian's court, and a personal assistant to Trumpkin, the king's Regent.
He was described as a little Faun who stood at the side of Trumpkin's elbow, holding his silver ear trumpet for him, as Trumpkin had grown quite deaf in later life.