Doran Martell is the Prince of Dorne and Lord of Sunspear. His children are Arianne, Quentyn, and Trystane, the latter of which is betrothed to Myrcella Baratheon. Doran was the brother of Princess Elia, who died during the sack of King's Landing, and Prince Oberyn, who was killed in battle with Ser Gregor Clegane. As of A Feast for Crows, Doran is plotting against the Iron Throne and seeking to aid Queen of Dragons Daenerys Targaryen