She was caught trying to steal the crown-jewels of Aznagar.
The Founders freed her and she left the Kingdom on the promise that she is now an ally of Aznagar.
Nightingale resurfaced in Pitax and took over the thieves guild for the Founders.
Aecora Silverfire is the leader of the Nomen Centaurs in the Dunward plains of the River Kingdoms. Her daughter is Xamanthe.
After the battle of South Cross, many of her warriors are dead. She has returned to the Nomen lands to recover.