13. Margaery Tyrell
She doesn't want to be a queen – she wants to be the queen. Between that ice-cold declaration and her red-hot sex appeal, you'd be forgiven for thinking Lady Margaery is a junior-varsity Cersei. But her care for the peasants, her brother Loras, her grandmother Olenna and her fellow fiancée-to-Joffrey Sansa Stark all appear legitimate. They just also happened to be great politics, which is part of what made Margaery one of the game's most powerful players – and made her imprisonment by the High Sparrow and death at the Lannister Queen's hands so tragic.