Who are the characters in the story of The Ugly Duckling?

The main characters in "The Ugly Duckling" include the titular ugly duckling, who struggles with feelings of inadequacy and isolation due to his appearance. Other characters include the mother duck, who initially rejects him, and various animals, like the swans and other ducks, who mock him. As the story progresses, the ugly duckling eventually transforms into a beautiful swan, finding acceptance and belonging among his peers. The tale highlights themes of identity, self-acceptance, and the journey to find one's true place in the world.