Joffrey was the ruthless former king who enjoyed killing prostitutes and emotionally tormenting everyone around him. He was poisoned to death at his wedding.
Jamie and Cersei Lannister are twins and lovers. Jamie was the best swordsman in Westeros until he was captured by Robb Stark’s men and his hand was cut off.
Cersei was the queen of Westeros and still tries to rule everything around her mercilessly.
Hodor is a large and mentally underdeveloped man who serves the Starks. Since Bran was paralyzed, Hodor carries him around, even on his adventure north of the wall. Hodor can only say, “Hodor.”
Greyworm is a member of the Unsullied, warrior slaves castrated and trained to be the world’s best soldiers. He and his comrades were liberated by Daenerys Targaryen and now he serves as the commander of the Unsullied and serves the would-be queen.
Davos Seaworth is a former smuggler turned Hand of the King. He serves as the chief advisor and voice of reason to the often obsessed and fanatical Stannis Baratheon.