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  === Qyburn ===
  Qyburn is a former Maester who lost his chain for unethical experiments. He is also rumored to dabble in necromancy. In ''A Clash of Kings'', he is a member of the Brave Companions mercenary company. He later leaves the company in ''A Feast for Crows'' and joins the court at King's Landing. Queen Cersei Lannister allows him to experiment on the mortally wounded Gregor Clegane, presumably transforming Clegane into the monstrous Kingsguard knight, Ser Robert Strong.
  In the HBO television adaptation, he is portrayed by Anton Lesser. He improves Cersei's military capabilities via highly explosive 'wildfire' (deployed to destroy the Great Sept of Bealor), and anti-dragon scorpio ballistas, which are deployed around the walls of King's Landing, and on the bows of Euron Greyjoy's Iron Fleet. He is killed by Gregor Clegane as they attempt to flee the Red Keep.