Ser Barristan Selmy is a celebrated knight of Westeros, having served as a member of the Kingsguard during the reign of the Mad King Aerys. Ser Barristan became a hero when he saved the Mad King during the Defiance of Duskendale. He continued to serve loyally during the reign of Robert Baratheon, but was dismissed by the council of King Joffrey, likely because he was too honorable to be bought by the Lannisters. After being dismissed, he crossed the Narrow Sea and arrived to Easteros to serve under Daenerys Targaryen, daughter of the Mad King.