Gregor Clegane"The Mountain"
A massive knight who stands more than seven feet tall, Ser Gregor Clegane is known as "The Mountain That Rides." Along with his brother, Sandor Clegane, he serves the Lannisters as a vicious thug, but the two bear no love for each other. During the wartime sack of King's Landing, Gregor raped and murdered Elia, wife of Prince Rhaegar, and killed their two young children.
"I always thought you had a talent for violence." — Tywin Lannister