Ser Barristan Selmy is a fictional character from the book series A Song of Ice and Fire by George R.R. Martin. He is a highly respected knight known for his exceptional skills in combat and unwavering sense of honor. Barristan serves as a member of the Kingsguard, the elite group sworn to protect the king of Westeros. Throughout the series, Barristan is portrayed as a loyal and noble figure, often reflecting on the ideals of knighthood. He initially serves King Aerys II Targaryen and later becomes a key ally to Daenerys Targaryen, helping her navigate the complexities of power and leadership in her quest to reclaim the Iron Throne.