Mitsuhiro Ide is a highly intelligent and skilled engineer who serves as the science officer of the Science Special Search Party, the organization dedicated to defending Earth from giant monsters and alien threats. First appearing as a young member of the original SSSP in the classic series, he is portrayed in the anime adaptation as an elderly but still sharp and vigorous figure. In his later years, he publicly serves as the director of the Light Giant Museum while secretly working as a key member of the modernized SSSP, operating from a hidden underground facility beneath the museum. A brilliant inventor and engineer, Ide is responsible for developing the advanced Ultraman suit that allows Shinjiro Hayata to harness his inherited Ultra Factor and fight as a new Ultraman. He is calm, methodical, and deeply analytical, always approaching problems with a scientific mindset and providing essential technical support during missions. Ide values human life above all and frequently demonstrates a caring and empathetic nature toward both his colleagues and civilians in danger. He shares a close, long-standing bond with Shin Hayata, whom he has known since their days serving together in the original SSSP, and he later becomes a mentor figure to Shinjiro, guiding the young protagonist as he learns to control his powers and accept his responsibilities. Initially skeptical of humanity overreliance on Ultraman, Ide grows into a figure who encourages self-reliance and proactive problem-solving, pushing the team to find their own solutions rather than depending solely on the giant hero. He is known for his cautious and careful personality, often anticipating potential dangers and worst-case scenarios, yet his loyalty to those he trusts is unwavering. In combat situations, Ide remains composed under pressure and uses his technical expertise to devise strategies and develop prototype weapons, including the Pencil Bomb, which plays a crucial role in allowing humanity to achieve victory through their own efforts. His character embodies the theme of human ingenuity and the importance of standing on ones own feet, evolving from a young officer who relied on Ultraman into a wise engineer who empowers the next generation of protectors.