Aerie lived in Faenya-Dail until she was captured by slavers and sold to the circus, where she was kept in a cage which caused her wings to atrophy until they had to be forcibly removed. She is encountered in Waukeen's Promenade, where she is working in the circus under ringmaster Quayle, who saved her from the previous ringmaster. Once the circus has been cleared of its evil illusions, she may join the party. Minsc may eventually adopt her as his new witch. She is naive, physically weak, and sometimes childish, but she is highly intelligent. She dually venerates her divine patron, the gnome god Baervan Wildwanderer, and her traditional Avariel goddess, Aerdrie Faenya. It is possible for a male protagonist to romance her. If the romance continues into the Baldur's Gate II: Throne of Bhaal expansion, she has the protagonist's child, though Aerie will refuse if the protagonist is of evil alignment. Although kind and often caring of her friends, Aerie still holds in thoughts of her wings, and often becomes depressed when speaking of her past.

Source: Wikipedia, "Aerie (Baldur's Gate)", available under the CC-BY-SA License.