Alyssanne "Allie" Targaryen was the younger daughter of Viserys I Targaryen and Aemma Arryn. When she was born, he mother died giving birth to her and her twin brother, Baelon. Baelon died an hour after his birth. Her stepmother, Queen Alicent Hightower raised her as her own. Viserys only adored her because she was the splitting image of her older sister, Rhaenyra