Game of Thrones: 10 Times Girls Run the World in Season 6

How She Slays: Lady Olenna has always had something up her sleeve. She is, after all, the one who kills Joffrey Baratheon at his own wedding. By the end of season six, she's hellbent on getting her revenge on Cersei Lannister. She's a key component in a new alliance between Daenerys Targaryen and Dorne — one that just might help the Mother of Dragons take the Iron Throne.