George is a white-furred mouse with cyan eyes, pegged as successor to Leopold, his clan's elder leader. He possesses a dreamy yet adventurous spirit, frequently gazing out windows at the world beyond. Though he flinches more readily than his rival Gerald, George finds the courage to confront his fears when others need protection. He treats everyone kindly and prioritizes his friends, especially his best friend Walter, consistently looking after him despite Walter's slower pace. George is enthusiastic and resourceful, though occasionally impulsive.

Leopold sets a leadership test: George and Gerald must journey to the distant Valley of the Moon to capture the mythical Dragon of Light. This quest determines Leopold's true successor. Initially competing, the pair learn to cooperate as they navigate forest perils: avoiding poisonous berries, escaping an owl, and outsmarting a predatory weasel. George's sharp observation spots the dangerous berries others miss. His protective instincts drive him past his own anxiety to aid companions in danger.

This quest transforms George from a hesitant dreamer into a collaborative and courageous mouse. His inherent kindness and loyalty to friends like Walter remain steadfast, but he gains confidence in his ability to contribute to the group's survival. The adventure culminates by reinforcing teamwork, a core theme in George's interactions with Gerald and others.