Zero Tester (ゼロテスター, Zerotesutā) is a mecha anime series produced by Crystal Art Studio (later renamed as Studio Nue) and Tohokushinsha and animated by Soeisha (later renamed as Nippon Sunrise).

In response to the failure of Hazedon in the previous year, the second work of Soeisha changed the project content from marine adventure to science fiction.

Voice - Tomoharu Takeo (竹尾智晴) (Now known as Ryusei Nakao (中尾隆聖)) Tester No.

In episode 49, it is revealed that he is from Jupiter's space colony and he lost his mother in an accident when he was a boy.

Voice - Yoko Asagami (麻上洋子) (Now known as Ichiryusai Harumi (一龍斎春水)) Tester No.

Voice - Shun Yashiro ( 八代駿) A technician dedicated to the tester corps.

Voice - Ryoichi Tanaka (田中亮一) A male member who was appointed as a Mark 3 pilot in place of Lisa in episode 54.

Died in the line of duty due to an attack by Specter Garos.