Ser Gregor
Clegane
"The Mountain"
A massive knight who stands more than seven feet tall, Gregor Clegane is known as "The Mountain That Rides." Along with his brother, Sandor Clegane, he serves the Lannisters as a vicious thug. During the wartime sack of King's Landing, Gregor raped and murdered Elia Targaryen and killed her two young children.