President Gappori presides as principal of the school attended by the jug-eared boy detective protagonist, who solves cases baffling to authorities. His responsibilities involve overseeing the educational environment where these investigations often occur. Appearing exclusively within the school setting, he interacts with students and staff in his administrative capacity. His documented role is solely within the original 1966 television series' episodic structure, without additional narrative layers, backstory, character development, or verified appearances in supplementary media like films, OVAs, spin-offs, or alternate adaptations.