Tenya Ida, operating under the hero name Ingenium, attends U.A. High School as a Class 1-A student. Hailing from the distinguished Ida family, famed for its hero lineage, he deeply reveres his older brother Tensei, the original Ingenium. His Quirk, Engine, manifests as automobile-like engines in his calves, granting exceptional speed and kicking force. This ability features multiple gears and a special mode, Recipro Burst, which provides immense velocity for ten seconds before an overheating cooldown. He later develops Recipro Extend to bypass this limitation, achieving speeds up to Mach 3. Tenya embodies discipline, earnestness, and strict adherence to rules, often communicating with formal speech and precise arm-chopping gestures. As class representative, he champions order, responsibility, and peer safety. His elite background occasionally renders him socially unaware and prone to snap judgments. Academically proficient, he ranks second in Class 1-A's midterms and displays sharp tactical acumen in combat. A crucial turning point arises when the Hero Killer, Stain, critically injures Tensei. Consumed by vengeance, Tenya violates protocol to confront Stain, nearly dying in the attempt. Rescued by Izuku Midoriya and Shoto Todoroki, he recognizes his recklessness and adopts a scar on his left shoulder as a permanent reminder of true heroism. He inherits the Ingenium title, pledging to uphold his brother's legacy. During the OVA "Make It! Do-or-Die Survival Training," Tenya shields Momo Yaoyorozu from earthquake debris during a rescue exercise. This selfless act leaves him unconscious and wounded, compelling classmates to prioritize his evacuation while navigating the collapsing structure. The incident exemplifies his instinct to sacrifice himself for others, even in simulations. Post-graduation, Tenya becomes the No. 13 Pro Hero and leads his brother's agency, Team Idaten. His updated hero costume honors the Ingenium legacy with a streamlined, briefcase-storable helmet featuring dual horns. Physically, he grows taller and more muscular while retaining his signature engines and exhaust pipes. His personality evolves to balance rigid principles with adaptability, acknowledging that heroism sometimes necessitates unconventional methods for the greater good.