Win or Die
Shiera Seastar was the last of the Great Bastards of King Aegon IV Targaryen, born to his last mistress, Serenei of Lys. The known lover of Brynden Rivers, she is said to have been the most beautiful woman of the Seven Kingdoms
King Aegon IV Targaryen sired Shiera upon the ninth and last of his mistresses, Lady Serenei of Lys. She died in childbed bringing forth Shiera, the child’s name meaning "Star of the Sea. Shiera turned out to be a Blackfyre loyalist. She fed her half-brother intelligence from Kingslanding while manipulating “Bloodraven” the entire time. She managed to flee the city and join with the Blackfyre remnants.