Though not explicitly detailed in the provided plot summaries, the narrator serves as a consistent narrative device across the 1974–1975 Czech children's film trilogy. Likely functioning as a voiceover or framing storyteller, this character guides the audience through the young protagonist's evolving journey of companionship and discovery. The narration reinforces the overarching themes of intergenerational wisdom, imaginative friendship, and moral growth, providing reflective context that ties together the boy's experiences with his elderly friend, mechanical companion, and loyal dog.