Fiona Oakley is an energetic young sprite and heir to the Autumn throne. Her best friend is her miniature unicorn, Twilight. She loves adventuring and has a talent for getting into trouble. She has light blonde hair, brown eyes, and pointed ears. She wears a woolen top and a leaf skirt. She approximately 12 inches tall—small, even for a faerie.

Fiona lived in the Autumn court until an attempted assassination forced her to run away. After narrowly escaping, she takes on a new identity and tries to hide her royal heritage, only to get caught up in an adventure involving goblins, owls and faerie politics.