Younger twin of Baela, born in 116 AC on Driftmark to Prince Daemon Targaryen and his second wife Laena Velaryon. Where her sister was a creature of dragons and sea-spray, Rhaena was the quieter twin from the start, slighter and more inward, bookish where Baela was bold. Her mother died bearing the boy who would have been their brother when the twins were four; their father carried them away to Dragonstone soon after, to grow up at the court of his new wife and cousin, Princess Rhaenyra, in the company of Rhaenyra's sons.
When the Dance of the Dragons began in 129 AC, Princess Rhaenyra sent Rhaena across the narrow sea to Pentos for safekeeping, carrying with her a single unhatched dragon egg from the Dragonmont. Rhaena sat out the war among the silks of a Pentoshi magister while her sister rode against the greens on Moondancer; she returned to Westeros after Rhaenyra's death and the broken peace that followed, and in the years of King Aegon III's regency the egg she had warmed in her bed at last cracked and gave her a pale she-dragon she named Morning. Morning was the last dragon the Targaryens would ever bond, the last colour of dawn in a dynasty already going dark.
Her first marriage was to Ser Corwyn Corbray of Heart's Home, in 135 AC; he was killed within two years by outlaws on the kingsroad, leaving her childless. In 138 AC she was wed a second time, to Lord Garmund Hightower of Oldtown, and gave him a long line of daughters who would in their turn marry into Lannister, Redwyne, Tyrell, Costayne, and Mullendore, knotting Hightower blood through every great house of the Reach. She lived out her years at the Hightower of Oldtown as its Lady, watched her dragon grow heavier and slower with each passing decade, and died there in 170 AC; Morning is not recorded to have flown after her, and the Targaryens never again hatched a dragon.