Gildie is a female Flareadon who lives at Havenfield. She is eagle-sized with gold fur and gold eyes. When Gildie first arrived at Havenfield in Keeper of the Lost Cities, Grady and Edaline thought she was a pterodactyl. However, when Sophie read her mind telepathically, she realized Gildie needed fire to survive. After Sophie's attempt to help the Flareadon, Grady and Edaline insisted Sophie to go to her bed. It was speculated later that the Black Swan sent Gildie to Sophie in order to collect the Everblaze in the Forbidden Cities, so she could prove that the fires were Everblaze.
Sophie was given a gold Flareadon Prattles pin, made of Lumenite, by the Black Swan as a clue to use Gildie to catch a sample of the Everblaze.