The character known as Narration in the anime Zero Tester serves as an off-screen narrator who provides exposition and contextual commentary throughout the series. This character is listed as a supporting role in the production, appearing in both the original Zero Tester run and its sequel series Zero Tester: Save the Earth. The voice actor behind this role is Tatsuyuki Jinnai. The narration is most prominently featured in the series opening animation, where the narrator delivers a defining description of the Zero Tester team. The narration explains that the Zero Testers are young people who challenge the limits of zero life support, driven by courage, hope, and friendship, as they work to carve out Earth's future. This opening statement establishes the core identity and mission of the main characters for the audience. Beyond this opening declaration, the narration functions as a traditional storytelling device throughout the episodes, explaining plot developments, alien threats, and technological concepts to guide viewers through the narrative. The character does not appear visually on screen and has no direct interaction with the other characters within the story. Instead, the narration acts as an external voice that bridges the action on screen with the understanding of the audience. As a narrative device rather than a participating character, the narration does not experience personal development or change over the course of the series. There is no information available in the search results regarding the character's background, personality, internal motivations, key relationships, or specific notable abilities beyond the function of providing spoken commentary on the events of the series.