Serenei of Lys was the ninth and last mistress of Aegon IV. There was one child of their union, Shiera Seastar - the last of the king’s Great Bastards. She was considered by many to be the most lovely of Aegon’s mistresses. Lady Serenei was the last daughter from an ancient but impoverished Valyrian noble family. She was cold and haughty towards others at court. Rumors spread that that she was much older than the king, practising dark arts to retain her youth and beauty. The rumors that she used dark magic to maintain her beauty also followed her daughter. Lady Serenei died giving birth to her daughter.