Tenya Ida, class president of U.A. High School’s Class 1-A, carries the weight of his family’s heroic legacy as a member of the esteemed Ida lineage. His older brother, the pro hero Ingenium (Tensei Ida), instilled in him a disciplined, rule-bound demeanor driven by a desire to honor their reputation. This rigidity gradually softened through pivotal trials, reshaping his understanding of heroism. Tenya’s Quirk, Engine, embeds mechanical turbines in his calves that propel him at superhuman speeds. Techniques like Recipro Burst and Recipro Turbo unleash explosive bursts of velocity, though prolonged use risks engine overheating. Subsequent upgrades—reinforced mufflers, enhanced fuel efficiency—culminated in feats like crossing vast distances at Mach 3 during the Final War to transport Shoto Todoroki. The Hero Killer arc marked a turning point. Consumed by vengeance after Stain crippled Tensei, Tenya recklessly confronted the villain, narrowly surviving the encounter. The ordeal left a jagged scar on his left shoulder and a renewed resolve to prioritize collective safety over personal vengeance. Academically, Tenya ranked second in midterms and fourth in the Quirk Apprehension Test, showcasing both intellectual rigor and physical aptitude. As class representative, his strict leadership initially clashed with peers, but crises like the Paranormal Liberation War saw him adapt, joining unauthorized missions to protect allies—a balance between protocol and pragmatism. Post-graduation, Tenya inherited the Ingenium mantle, revitalizing his brother’s agency, Team Idaten, and ascending to the No. 13 Pro Hero rank. His upgraded costume featured streamlined armor and a retractable helmet for aerodynamic efficiency, complementing his taller, more muscular frame and slicked-back hairstyle. Tenya’s bond with Izuku Midoriya and Shoto Todoroki anchored his growth. His friendship with Izuku, forged during U.A.’s entrance exam, deepened through mutual humility—exemplified when Tenya apologized for misjudging Izuku’s motives. Despite his formal demeanor, quirks like emphatic arm chopping revealed an undercurrent of earnest enthusiasm. His arc traces a journey from rigid heir to adaptable hero, grappling with legacy’s demands while redefining responsibility through action—a narrative thread intertwining personal redemption with the broader complexities of heroism.