Metro is an android positronic brain who serves as the robotic equivalent of Professor Maestro. He was created by Maestro, though Metro firmly believes that he is more resourceful and intelligent than his creator. His personality mirrors Maestro’s: he is whiny, old‑fashioned, doting, and possessed of a deep curiosity about how humanity functions. Despite his sometimes complaining nature, Metro is a scholar among robots and manages to defeat opponents through cunning rather than brute force.

Metro’s primary role is to accompany the young space police officers Pierrot and Psi on their patrols. He provides invaluable assistance in dangerous situations by analyzing and highlighting the peculiarities of the various worlds they visit, helping the team navigate unfamiliar environments and cultures. He works closely with Pierrot and Psi and is considered a great help to the police force.

Throughout the series, Metro undergoes a significant development when he is destroyed in a crash, only to later be recreated. This event underscores his status as a machine, yet his continued presence reinforces his importance to the team. His relationship with Maestro is marked by a tense but amusing rivalry: Maestro created him in his own image, but Metro openly doubts his creator’s superiority, leading to moments of conflict and humor.

Notable abilities include his advanced analytical skills, cunning problem‑solving, and encyclopedic knowledge of alien species and technologies. As an android, he lacks a physical body with hair but has black eyes, and his mechanical nature allows him to survive incidents that would destroy organic beings. Metro’s contributions are essential to the success of many missions, and his quirky personality adds depth to the crew’s interactions.