A resourceful and thoughtful young boy who befriends Louis and supports him throughout their mutual adventures. He loves exploring nature and provides guidance and help to Louis.

Parents of Louis, who display deep love and commitment to their family. The cob is grandiose and self-focused, while the swan is practical and straightforward in her approach to the family’s challenges.

A young swan who becomes the object of Louis’s affection and eventually his wife. Initially uninterested in Louis due to his lack of voice, she becomes charmed by his musical talent.

Adults who assist Louis during his youth, with Mrs. Hammerbotham teaching him to read and write, and Mr. Brickle hiring him as a camp bugler and recognizing his value through awards.

Adults Louis meets in his career as a musician, who help guide him through professional settings. The Boatman assists Louis with accommodations, Mr. Lucas is firm yet informative about zoo policies, and the Head Man deals with Louis’s dealings related to Serena.

Sam's parents, who support and provide a secure foundation for Sam. They offer general parental advice despite not fully understanding his independent nature.