Ellaria Sand was the paramour of Prince Oberyn Martell of Dorne and a bastard, carrying the bastard surname "Sand" like all bastards in Dorne. After Oberyn's death while defending Tyrion Lannister in a trial by combat, Ellaria pushes for House Martell to go to war with House Lannister, but is refused by Oberyn's older brother, Doran Martell. In retaliation, Ellaria and the Sand Snakes murder Doran's ward, Myrcella Baratheon, and eventually Doran himself and his son, Trystane Martell. They…