Dr. Hulefante is depicted as the successor to Dr. Boyton as the director of the Institute of Science. He is a central figure in Astro Boy's life, serving as a father figure and a guiding force who actively combats the concept of robot slavery. It is he who rescues Astro Boy from a cruel existence working for a villainous circus owner named Cachatore, giving the young robot a new purpose. His compassionate nature is further demonstrated by his creation of robot parents for Astro Boy, as well as a robotic sister named Lucero, to provide the hero with a supportive family environment. In some contexts, he is also referred to as Dr. Packidermus Hulefante, and his Japanese name is Dr. Ochanomizu. He is a consistent presence in Astro Boy's life, taking on the role previously held by the original creator and acting as a moral and scientific anchor for the series’ protagonists.