Laena Martell

Laena Martell was the only daughter of Prince Qoren Martell and the sister of Dorran and Ryden, She became her father's heir when her elder brother was slain by Daeron Waters in a duel. Laena was sent to Braavos to negotiate a loan with the Iron Bank for Queen Elaena Targaryen, however her party was intercepted by the forces of the Golden Company, and she was captured and presumably killed.