From A Wiki of Ice and Fire
|Died||In 284AC, at Dragonstone|
|Spouse||Aerys II Targaryen|
|Book(s)|| A Game of Thrones (Mentioned)|
A Storm of Swords (Mentioned)
A Feast for Crows (Mentioned)
A Dance with Dragons (Mentioned)
Rhaella Targaryen was the sister, wife, and queen of King Aerys II Targaryen and the daughter of King Jaehaerys II Targaryen. Her grandfather was Aegon V Targaryen. Rhaella had three children, Prince Rhaegar, Prince Viserys, and Princess Daenerys. She died shortly after giving birth to the princess.
Ser Barristan Selmy claimed that in her youth Rhaella was in love with a knight prior to the princess's official betrothal to her brother, Prince Aerys. Although Ser Barristan did not mention the name of the knight it was Ser Bonifer Hasty. 
Ser Bonifer wore Rhaella's favor and won a tournament where he named Rhaella queen of love and beauty. The pair had a passionate but ultimately doomed love, as Ser Bonifer was of too low birth to be seriously considered as a suitor for a Targaryen princess.
Marriage To Her Brother
At the command of her father, King Jaehaerys II, Rhaella married her brother Aerys at some time before 259AC. Jaehaerys was influenced by a woods witch brought to court by Jenny of Oldstones, who prophesied that the prince that was promised would be born from their line. According to Barristan, there was no fondness between Aerys and Rhaella on the day of their wedding.
In later years, as Aerys's insanity began to set in, he grew sexually abusive toward Rhaella. He developed a sexual fetish for fire and death, only sleeping with Rhaella after he had executed someone by burning. The final time, just before the queen was sent to Dragonstone to escape the coming siege of King's Landing by rebels during the Robert's Rebellion, Ser Jaime Lannister of the Kingsguard recalls listening to Rhaella cry as the king raped her; when Jaime protested that the Kingsguard were sworn to defend the queen as well, Ser Jon Darry replied, "We are, but not from him". In the morning, the queen's maids reported seeing scratches, bruises and bite marks all over her body. 
According to Ser Barristan Selmy, Rhaella did her best to protect her younger son, Viserys, from the worst of Aerys's excesses, keeping her child oblivious to the fact his father was sliding deeper into madness. In Harrenhal Jaime tells Brienne that by the time King Aerys was ordering that catches of wildfire be placed all over King's Landing Rhaella's eyes had been closed for years.
Evacuation to Dragonstone
After the royalist defeat at the Battle of the Trident, Queen Rhaella, who was in the early stages of pregnancy, and Prince Viserys were evacuated, sailing to Dragonstone with the Red Keep's master-at-arms Ser Willem Darry, before King's Landing fell to the rebels. As Robert's Rebellion wound down, Dragonstone became the last haven of the remaining Targaryens.
Rhaella spent the duration of her pregnancy on Dragonstone. Nine moons after their midnight flight from King's Landing Rhaella gave birth to her third child and only daughter Princess Daenerys while a raging summer storm threatened to rip the island fastness apart. Rhaella died shortly thereafter from complications of giving birth.  Rhaella's surviving children inherited her crown. Later, in poverty in exile, they sell their mother’s crown in order to survive.
Quotes about Rhaella
|“||Whenever Aerys gave a man to the flames, Queen Rhaella would have a visitor in the night.||”|
|“||Jaime: We are sworn to protect [the queen] as well.
Jonothor: We are, but not from [the king].
|“||The queen your mother was always mindful of her duty.||”|
References and Notes
- ↑ 1.0 1.1 A Game of Thrones, Chapter 3, Daenerys.
- ↑ "Bonifer Hasty" entry in A World of Ice and Fire
- ↑ A Storm of Swords, Chapter 70, Tyrion.
- ↑ A Dance with Dragons, Chapter 23, Daenerys.
- ↑ A Feast for Crows, Chapter 34, Cat Of The Canals.
- ↑ 6.0 6.1 A Feast for Crows, Chapter 16, Jaime.
- ↑ A Storm of Swords, Chapter 71, Daenerys.
- ↑ A Storm of Swords, Chapter 27, Daenerys.