After the death of her father King Viserys I, his will stated that Princess Rhaenyra would succeed him. However, Ser Criston Cole, Lord Commander of the Kingsguard, defied the King’s will and instead crowned Rhaenyra’s half-brother Aegon II, who was ten years younger. This brought about a Targaryen civil war, known as the Dance of the Dragons, where dragon riders fought each other. During the war Rhaenyra rode her Dragon Syrax. Rhaenyra’s bid failed and her half-brother Aegon had her fed to his own dragon. Aegon died shortly after his victory with no male issue, and was succeeded by Rhaenyra’s son, Aegon III.
∟Rhaenyra Targaryen, the first-born child of King Viserys I.

You make me happy. :D
Queen you shall be,
until there comes another,
younger and more beautiful,
to cast you down,
& take all that you hold dear.
“You should have learned by now, none of us get the things we want.”
I have, though, Sansa thought. I am free of Joffrey. I will not have to kiss him, nor give him my maidenhood, nor bear him children. Let Margaery Tyrell have all that, poor girl.

