A gentle and lonely young apprentice with chestnut hair and pale blue eyes, who befriends Celeste. His kindness provides her with protection and companionship.

A tall and proud artist with auburn hair, who is determined to paint every bird species in North America. His ambitious nature and unconventional methods impact both human and animal characters.

A wood thrush with a yellow bill and creamy white breast feathers, who forms a quick friendship with Celeste. He inspires others through his curiosity and beautiful song.

A jovial and majestic osprey with golden yellow eyes and a sharp beak, who becomes a key ally and friend to Celeste. His cheerful personality and willingness to help are crucial to the story.

A large gray rat with a raspy voice, serving as an antagonist through her bullying and greedy nature. Her actions create challenges and obstacles for Celeste.