Cersei Lannister

Queen Cersei Lannister was a member of House Lannister, as well as the Queen to King Robert Baratheon.

Background
After Robert's rebellion, Cersei is forced into a marriage with King Robert by her father, Tywin Lannister. Cersei marries him and becomes Queen, but despises Robert and has an incestuous affair with her twin brother Jaime, producing four children with him but passing them off as Robert's children.

"A Game of Thrones" (298)
Cersei dies under suspicious circumstances, prompting Jon Arryn to send a letter to Eddard Stark claiming that Cersei was assassinated by Robert and his Small Council. After Cersei's death, Robert marries Myranda Royce.