ONA
Description
Professor Ochanomizu is the head of Japan's Ministry of Science in Pluto, a position he assumes after Professor Tenma. He is the scientist entrusted with the care, maintenance, and management of Atom, the most advanced robot in the world, and he is also the creator of Atom's sister, Uran. He is a widower who lives alone in the downtown area of Tokyo and is regarded as a warm grandfather figure, beloved by his grandchildren.

In personality, Ochanomizu is gentle, kind, and good-natured, with a deep and sincere affection for robots. He firmly believes that robots are living beings and treats them with compassion and respect rather than as mere machines. This conviction defines much of his behavior, and he acts as a devoted advocate for robot rights in a world where the boundaries between human and robot life are hotly contested. He is also a deeply caring figure, serving as a guardian and father figure to Atom, someone who cherishes Atom as if he were his own child.

His central motivation is the protection and wellbeing of robots, especially Atom. He is guided by a belief in peaceful coexistence between humans and robots, and he works to shield those under his care from harm, both physical and political. This places him in contrast with more detached or utilitarian figures in the scientific and governmental world, as he consistently prioritizes the lives and feelings of robots.

Within the story, Ochanomizu's role is largely that of a protector and moral anchor. He takes in a battered robot dog and attempts to repair it, demonstrating his instinct to care for damaged and abandoned robotic life. As the series progresses, he closely monitors Atom's erratic behavior, growing increasingly concerned as the investigation into the robot murders draws nearer to those he loves. His home becomes a place of refuge, and his scientific authority gives him the standing to intervene in matters of national and international importance.

His key relationships center on Atom, whom he treats with paternal affection, and Uran, whom he created. His predecessor, Professor Tenma, stands as a contrasting figure, as Tenma's colder and more troubled approach to robots differs sharply from Ochanomizu's warmth. Ochanomizu also acts as a link between the world of advanced robotics and the human institutions that seek to control it, offering a voice of empathy within the Ministry of Science.

Throughout the story, Ochanomizu remains consistent in his principles, but his experiences deepen his understanding of the threats facing robots and the emotional weight of his responsibilities. His quiet dedication becomes increasingly significant as the conflict escalates, and his presence provides a grounding humanity in the unfolding crisis.

His notable abilities are scientific rather than combative. He is a highly skilled robotics expert capable of creating advanced robots, as shown by his construction of Uran, and he is adept at repairing and maintaining robotic bodies, including intricate repair work on damaged machines. His expertise, institutional authority, and moral conviction together make him a vital figure in the protection of the robots he loves.
Cast