Rhaenyra Targaryen, cheered as the Realm's Delight when she was young, and later called the Half-Year Queen, was the first-born child of King Viserys I Targaryen. Rhaenyra was King Viserys I's only living child by his first wife, Queen Aemma of House Arryn. At the age of eight, she was made her father's heir, and grew up expecting to become the first ruling Queen of Westeros. Rhaenyra was a dragonrider whose mount was Syrax.
Her claim to the Iron Throne was challenged by her younger half-brother, Aegon II Targaryen, sparking the civil war known as the Dance of the Dragons.