Ser Arthur Dayne, known as the Sword of the Morning, was a famed knight and a member of Aerys II's Kingsguard. He was one of Prince Rhaegar's closest friends. His accomplishments include defeating the Kingswood Brotherhood and slaying the Smiling Knight. Jaime Lannister squired for him, and was knighted by him. He wielded the sword called Dawn and died at the Tower of Joy fighting Eddard Stark and his companions, but the exact circumstances are unclear.