Exclusive to the anime adaptation, the Narrator operates as an omniscient, disembodied voice. This character delivers running commentary on events, internal thoughts, and psychological tactics of the main characters, framing their interactions as intense strategic battles. The narration employs a consistently serious, dramatic tone to depict mundane or comedic situations, creating intentional juxtaposition that amplifies the absurdity of the characters' schemes. Each segment typically concludes with results declared through phrases like "Today's results:".

Knowledge encompasses explanations of topics referenced by characters and interpretations of ordinary actions as elaborate maneuvers. The Narrator presents as an unbiased judge announcing outcomes of psychological confrontations.

Narration varies between language versions. The Japanese version maintains formal seriousness, while the English adaptation uses wittier, more casual language with pop-culture references and visible investment in story outcomes. The English Narrator expresses frustration with characters' decisions, cheers for romantic progression, and occasionally stifles laughter.

Serving as an adaptation solution, the Narrator replaces text-heavy manga dialogue boxes and adds comedic layers through exaggerated dramatic delivery. Occasional unexplained instances occur where Kaguya demonstrates awareness of or interacts with the Narrator.

In the live-action film, Jiro Sato voices the Narrator while also portraying Shozo Tanuma. The Narrator appears consistently across all anime seasons, OVAs, and specials, maintaining the core narrative role without significant deviation or personal backstory.