Dr. Stein, known as Gure of the Pora tribe, appears in the 1941 Kenya-set animated adaptation. He is a tribal warrior involved in the journey of Wataru Murakami, an 11-year-old Japanese boy separated from his father during the war's outbreak. Gure's role intersects with Wataru's survival efforts alongside Zega, a Maasai chief, and Kate, a girl claiming divine heritage. They collectively navigate shared perils, including wildlife and hostile tribes, while searching for Wataru's detained father.

His background remains consistent as a Pora tribe member, operating within the African wilderness's cultural and environmental context. His involvement centers on supporting the group's objectives through tribal knowledge and combat skills against antagonistic forces. The story depicts no significant personal evolution or expanded backstory beyond these events.

No additional narrative arcs, development, or appearances in other media like OVAs, spin-offs, or alternate continuities are documented for this character. His portrayal operates exclusively within the film's adventure framework, without elaboration on motivations or history external to the central plot.