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.
Nothing else is known about him.