Mitsuhiro Ide functions as the technological specialist for the Science Special Search Party (SSSP) in the original Ultraman series, maintaining equipment and developing new weapons. He often provides comic relief through his carefree and sometimes cowardly reactions to alien threats. Ide exhibits profound compassion, notably refusing to exterminate the transformed astronaut Jamila and criticizing the cover-up of its origins. His sentimental perspective on conflict victims stems from childhood experiences, including his mother's death. Ide's technical expertise proves vital: he creates spectrum rays to expose an invisible rocket and devises a translator for monster communications. During the Pestar battle, his accidental missile strike damages an oil refinery, prompting a guilt-driven, reckless firefighting attempt that requires Ultraman's rescue. He frequently questions the SSSP's purpose, doubting their impact when Ultraman resolves conflicts. This doubt peaks in "The Little Hero," where his complacency contributes to Pigmon's sacrificial death, though he redeems himself by defeating Dorako. Decades later, after the SSSP dissolves into the Earth Defense Force, Ide co-founds a covert SSSP branch operating from the Giant of Light Memorial Museum. He safeguards the secret of Shin Hayata's past as Ultraman, eventually revealing the truth to Hayata after decades of amnesia. As the SSSP's technological adviser, Ide designs Ultraman-modeled powered armor suits for Shin Hayata and his son Shinjiro. He oversees field operations, guides suit functions during combat, and provides tactical support like releasing power limiters. Ide mentors Shinjiro Hayata as the new Ultraman, equipping him with the suit and instructing him in its use. He coordinates missions, analyzes alien threats, and investigates incidents such as civilian barcode tagging. Though initially leading the covert SSSP, Ide transitions to an advisory role after being succeeded by Edo, a Zettonian. His inventions remain foundational to SSSP operations, and his loyalty to the Hayata family persists across generations. Ide collaborates with agents like Dan Moroboshi and Edo to counter extraterrestrial threats while navigating political complexities, including Earth's membership in the Star Cluster Alliance.