The character serves as an expository narrator, framing episodes with introductory and concluding remarks. During a time-travel storyline, they contextualize historical details such as 1950s Japanese children’s card games, linking these elements to the plot. Episodes often feature the narrator heralding the protagonists’ victorious returns after resolving conflicts, though these announcements are occasionally absent. Distinctive catchphrases include prefacing clarifications with “Please allow me to explain” and closing episodes with the exuberant sign-off “Yatter, Yatter, Yatterman!”

In live-action adaptations, the narrator elaborates on the protagonists’ secret dual identities and the Skull Stone’s capacity to destabilize time. They also interject during humorous moments, such as detailing the Doronbo Gang’s recurring misfortunes following botched missions. Official media offers no additional details about the narrator’s background, origins, or character evolution beyond these narrative responsibilities.