Mumen Rider, officially designated as License-less Rider, occupies the C-Class Rank 1 position within a professional hero organization. The 25-year-old hero possesses a slim build, standing 170 cm tall and weighing 66 kg, with brown hair usually concealed beneath a green helmet and goggles. His hero attire combines light armor with a black leather suit, reinforced gauntlets, kneepads, and a utility belt. He patrols Z-City astride his signature bicycle Justice, wielding it as both transport and weapon through maneuvers like the Justice Crash and Justice Tackle. Devoid of superhuman traits, he compensates with extraordinary resilience and unyielding determination, repeatedly challenging foes far exceeding his strength. Early heroic endeavors range from retrieving a child's balloon to facing low-level criminals like the Paradise Group—efforts frequently ending in defeat and hospitalization. His defining moment arrives during a clash with the Deep Sea King, a monstrous entity that had overpowered numerous elite heroes. Fully aware of his inadequacy, he delivers a impassioned speech about civic duty while enduring brutal punishment, buying critical time for reinforcements. This sacrifice, paired with staunch adherence to civic principles like obeying traffic signals during crises, crystallizes his unwavering dedication to justice. He serves as an ethical anchor within the hero community, notably maintaining respectful camaraderie with an immensely powerful yet overlooked colleague, formally acknowledging their deeds through written commendations. During catastrophic events like city-leveling alien invasions, he prioritizes civilian evacuations while others combat threats directly. Childhood ties to this formidable hero surface in supplementary materials, though neither initially recalls their shared past. Though his capabilities remain unchanged, his narrative significance stems from personifying relentless idealism. Functioning as a loving parody of tokusatsu archetypes, he champions ordinary resolve over supernatural prowess. His philosophy—valuing ethical effort above triumph—resonates across society, exemplified when public backlash over heroic failures provokes a higher-ranked hero to publicly shoulder blame, inadvertently shielding Mumen Rider's standing. Subsequent crises see him deploying his bicycle for strategic evacuations, demonstrating tactical pragmatism beneath his idealistic exterior. Within hero circles, widespread reverence for his courage solidifies his reputation as the embodiment of selfless service, transcending his low rank and human limitations to become an enduring symbol of hope.