A juvenile snow leopard whose playful demeanor and awkward innocence drive much of the narrative tension regarding his survival in the English forest.

Maggie’s grandfather, a country doctor in Cornwall who loves nature and supports Maggie’s growth through his compassionate understanding.

Maggie's nurturing mother who provides Maggie with a sense of security and opposes her husband's plan to send Maggie away.

Maggie's father, a former RAF serviceman whose desire for order creates tension but whose character evolves throughout the story.

A local landowner in Cornwall who represents opposition to conservation efforts through his plans to cut down Wildoak.

A well-meaning but shallow woman who briefly keeps Rumpus as an exotic pet, contributing to his release into the forest.