The Mouth of Sauron is Sauron’s servant, who greets Aragorn and his army upon their arrival at the Black Gate. His derision, arrogance, and greed are matched by his loyalty to Sauron, who he has been serving for so long that he has forgotten his original name. Despite his self-assurance, he is easily cowed by Aragorn’s authority. He retreats behind the Black Gate after Gandalf refuses the terms he offers for Frodo’s safe return.