Constable Bully partners with Inspector Dix at Scotland Yard, tasked with pursuing Willy Fog for alleged bank robbery. His cockney bulldog appearance and dialect reflect working-class London origins. Despite strong preferences for pub darts and Sunday roast at his mother's, Bully reluctantly joins the global chase out of loyalty.

Inherently good-hearted yet chronically clumsy, he suffers travel sickness and tests Dix's patience, creating comedic friction as a foil to the inspector's seriousness. His dissatisfaction surfaces through laments about forgotten farewells to friends and unwatered orchards, revealing longing for domestic stability.

Primarily comedic, Bully occasionally shows minor assertiveness—like striking Dix as retribution for their fruitless pursuit—hinting at resilience beneath his submissive exterior. He actively participates in investigations but often hinders progress by misidentifying suspects or mishandling evidence.

Across all official media including the original series and sequel *Willy Fog 2*, Bully remains consistent: a loyal but exasperated partner providing levity. As an original character absent from Jules Verne's novel, he enriches the adaptation's humor and narrative without altering core plots.