Across multiple Yatterman adaptations, the narrator operates as an expository voice, framing story events and delivering contextual information. In the 2008 anime series, this narrator introduces each episode's premise, frequently opening with "Please allow me to explain" before detailing the Doronbo Gang's schemes or the Yatterman duo's missions. Episodes conclude with the narrator's signature sign-off, "Yatter, Yatter, Yatterman!", cementing the series' branding.

For the 2009 live-action film, Kōichi Yamadera voices the narrator while also portraying Yatterwoof (Yatterwan) and Odate-Buta. Here, the narrator exposits on the Skull Stone conflict, clarifies character motivations, and contextualizes the fictional city Tokyoko—a setting blending elements from Tatsunoko productions. This narrator further details protagonists Gan Takada and Ai Kaminari's dual lives, balancing their Takada Toys business with crime-fighting duties.

The narrator maintains a consistently neutral, informative delivery and an omniscient perspective across all appearances. Official Yatterman media establishes no background, personal history, or developmental arc for this voice, positioning it as a strictly functional element rather than a story participant.