The Narrator provides essential exposition throughout the One Piece 3D2Y special, framing events and delivering crucial context without direct story participation. This role sets the stage for Luffy's emotional state after Ace's death, his training with Silvers Rayleigh, and the rise of antagonist Byrnndi World. The narration weaves together key plot points, including Byrnndi World's threat against the Shichibukai and Luffy's struggle to overcome his perceived failure at Marineford.

This narrative presence extends consistently across various One Piece media. The character fulfills the same function in the live-action One Piece series, One Piece: Strong World Episode 0, One Piece Film Red, One Piece: Romance Dawn Story, One Piece: Episode of Sabo, One Piece: Episode of Skypiea, One Piece: Episode of Chopper - The Miracle Winter Cherry Blossom, One Piece: Episode of Luffy: Hand Island no Bōken, and One Piece: Episode of East Blue: Luffy and His Four Friends' Great Adventure. Further narrative contributions occur in One Piece Log: Fish-Man Island Saga and the One Piece Jidaigeki Special.

Across all appearances, the Narrator maintains story continuity by offering objective summaries of events, character motivations, and thematic context, devoid of subjective commentary or personal history. No physical characteristics, personal background, or developmental arc are established. The consistent function remains providing an omniscient perspective and structural cohesion for the depicted events.