Lady Aemma Arryn was the queen consort and first wife of King Viserys I Targaryen, and a granddaughter of King Jaehaerys I Targaryen and his sister-wife, Queen Alysanne Targaryen.
Aemma was the daughter of Lord Rodrik Arryn and his wife, Princess Daella Targaryen, herself the daughter of King Jaehaerys I Targaryen and his sister-wife Alysanne Targaryen. Aemma married Prince Viserys Targaryen, her cousin, in 93 AC. Upon her grandfathers death, Aemma became the Queen Consort of Viserys, who had been chosen as heir to the throne during the Great Council in 101 AC.
Aemma became pregnant multiple times in the early years of her marriage. She suffered multiple miscarriages, and gave birth to a son who eventually died in the cradle. In 97 AC, Aemma gave birth to a healthy daughter, Princess Rhaenyra. Aemma and Viserys both adored their only living child.
In early 105 AC, Aemma became pregnant once more. Late in the year, Aemma gave birth to a son, Prince Baelon Targaryen. Aemma died during the birth, and her son died a day later.
Aemma's daughter Rhaenyra was chosen as heir to King Viserys I Targaryen in late 105 AC, after the deaths of both Aemma and her son Baelon, and after a fall-out between King Viserys and his brother, Prince Daemon Targaryen. Despite the fact that the lords of the realm swore their fealthy to Princess Rhaenyra in 105 AC, Aemma's daughter, upon Viserys' death in 129 AC, found herself in a struggle for the throne. Viserys had remarried after Aemma's death, and fathered four children with his new wife. The eldest of those four, Prince Aegon, had been crowned King by Lord Commander Criston Cole, and Queen Regent Alicent Hightower, in an attempt to overthrow Princess Rhaenyra, who, at that point, was still unaware of her fathers death.
This power struggle lead to a war known as the Dance of the Dragons, which caused the deaths of both Rhaenyra and her half-brother Aegon, as well as most of Rhaenyra's children, and Aegon's siblings and children.
Aemma's daughter Rhaenyra had six children, one of them stillborn. The youngest two of Rhaenyra's living children, Princes Aegon and Viserys, would later become kings, King Aegon III and Viserys II respectively. It would be the line of Viserys II that continued the line of dragonkings. In addition, Aegon's daughter Daena and Viserys' son Aegon had a bastard son together, Daemon, who would create House Blackfyre.