Papyrus is the brother of Sans. His main motive is to capture a human so he can become a member of the Royal Guard, and finally have friends and popularity. Papyrus is a flamboyant skeleton who presents a confident, charismatic image of himself. He works hard and, despite his brash personality, is kind at heart. He is optimistic, brave, and considerate. He is also occasionally oblivious and nonobservant but can be cunning at times, as seen when he uses reverse psychology to trick Undyne into befriending the protagonist.