Cersei Lannister is a member of House Lannister and the eldest child of Lord Tywin Lannister. She is the Queen of King Robert Baratheon, and has three children, Joffrey, Myrcella and Tommen Baratheon. She is the twin sister of Ser Jaime Lannister, and the older sister of Tyrion Lannister, whom she despises due to a prophecy that the "valonqar" would kill her. Although Tywin promised she would marry Prince Rhaegar, Cersei ended up Robert's disillusioned and resentful bride.