An innocent and curious character who ventures above-ground to explore the world; his new experiences symbolize youthful discovery and charm.

A friendly and self-sufficient water rat who enjoys life on the river; he acts as a practical and moral guide for Mole.

A large, gruff character living in Wild Wood; he’s a wise and protective figure among the protagonists, known for his influence and sense of duty.

A minor character deeply interested in the river, who maintains communication among the main protagonists and plays a part in their adventures.

Aggressive carnivorous creatures who serve as the main antagonists, causing trouble and squatting in Toad Hall during the owner's absence.

A demigod associated with the beauty of wilderness, whose presence during a search enhances the story's nostalgic connection to nature.