Paul appears solely in the 1975 anime adaptation as George's younger brother, operating as a Canon Foreigner absent from the original novel. He consistently exhibits Annoying Younger Sibling traits, functioning as a Bratty Half-Pint through impulsive behavior and blunt dialogue that provokes George. Examples include recklessly endangering himself, forcing George to intervene for his safety, and making tactless remarks—such as asking if Alois had died during her illness, which resulted in George physically reprimanding him. His rapid-fire, unfiltered speech reflects a rural upbringing and fuels comedic friction.

Paul's development focuses on his interactions with George and Nello, occasionally joining group activities like distracting Patrasche's abusive former owner. His character remains confined to this familial role, lacking significant individual arcs or background details. No canonical information exists concerning Paul's presence or portrayal in subsequent films, OVAs, spin-offs, or other adaptations of the source material.