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  === Gregor Clegane ===
  Ser Gregor Clegane, known as the Mountain That Rides, or simply the Mountain, is the older brother of Sandor Clegane and is a vassal to Tywin Lannister. His size and strength make him a fearsome warrior, and he has earned a reputation for brutality.
  In the HBO television adaptation, he is portrayed by Conan Stevens in season one, by Ian Whyte in season two, and by Hafþór Júlíus Björnsson in season four onwards.