Tenya Iida

Biodata

Feature	Value
Name	Tenya Iida (饭田天哉) 11
Alias(es)	Ingenium 198 437
Species/Race	Human
Gender	Male
Affiliation	U.A. High School; Hero Class A 11 25
Occupation/Role	U.A. student; Hero Class A class president; successor to Ingenium 25 146 198
Status	Active 437 440
First Appearance	Mentioned in Chapter 3; appears in Chapter 10 3 10

Power Progression

Stage / Realm / Level	Chapter	Notes
Engine baseline	12	Ran the 50-meter dash in 3.04 seconds during U.A.'s Quirk assessment.
Recipro Burst	101	Used his ultimate acceleration technique against Chiffon; it briefly leaves his legs stalled after use.
Golden Right Foot	131	Instinctively kicked away a zombie-like enemy with greatly increased speed and force during the Bio-Toxic Field mission.
Recipro Burst: Golden Calf Rush	198	Reached his personal breakthrough against Stain, disarming him with a high-speed kick before following with Golden Right Foot.
Engine Burst Ignition	414	Developed an instant close-range ignition technique capable of hospitalizing Superhumans near his level.
Seven Saints realm — Sixth Saint level	415	His diligence as class president helped him reach the Seven Saints realm, at approximately Sixth Saint level.
Emperor-class Peak	437 438	Reached Emperor-class Peak strength; a suited observer identified his combat power as Emperor-level.

Background / History

Tenya Iida entered U.A.'s Hero Course after graduating from Private Smart Middle School. He reunited with Izuku Midoriya at the school and immediately stood out for his formal conduct, blunt honesty, and disapproval of Bakugo Katsuki's destructive behavior. 10 11

He is the younger brother of the renowned Turbo Hero Ingenium, whose agency employs sixty-five people in Tokyo. Ingenium's professionalism and belief in bringing criminals to justice shaped Tenya's own view of heroism and duty. 3 112 146

During Class A's election for class representative, Tenya argued that the position should be decided democratically by those trusted by their classmates. Chiffon withdrew from the election and transferred his two votes to Tenya, securing his presidency. 25

Appearance

Tenya is recognized by his glasses and formal posture. His combat gear emphasizes the Engine Quirk in his calves.

• Wears glasses. 36 431
• Used silver armor during U.A.'s combat training. 17
• Later wears a fitted combat suit with leg engines capable of emitting intense blue light. 437
• His older combat suit eventually became too small for him. 437

Personality

Tenya is earnest, disciplined, and intensely serious about heroism. He values rules, etiquette, order, and collective responsibility; this is reflected in his objections to disrespectful conduct, his organized instructions to Class A, and his belief that a class representative must be trusted by others. 10 25 27

His directness can make him socially awkward or unintentionally blunt, but he is warmhearted and consistently willing to help others. He takes his responsibilities personally, whether organizing classmates, questioning mission risks, or ensuring his team's actions are coordinated. 16 32 118 295

After Ingenium was injured, Tenya struggled with grief, inadequacy, and the pressure of inheriting his brother's title. His confrontation with Stain forced him to reject revenge as his sole purpose and define for himself what it meant to carry on the name Ingenium. 142 146 198

By the Dark Age, Tenya had become far more decisive and severe. While still framing his actions as justice, he was willing to kill dangerous criminals and accept the consequences of enforcing order in a world where conventional hero systems had weakened. 437 438

Abilities & Skills

Engine

Tenya's Engine Quirk grants extreme speed and acceleration through engines in his calves.

• Recorded a 3.04-second 50-meter dash during U.A.'s physical assessment. 12
• Used Engine, boost! to escape the USJ and summon reinforcements. 36
• Can propel himself through the air using his leg engines. 437
• His engine exhaust can fill his protective suit with black smoke; he can draw the smoke back into his engine pipes. 132

Recipro Burst

A high-output acceleration technique that pushes Tenya's speed beyond his normal limit.

• Failed to strike Chiffon with it during the Sports Festival, as Chiffon accelerated beyond his reach. 101
• Causes his legs to stall after activation. 101
• Combined it with Golden Calf Rush against Stain, knocking away Stain's blade and landing a direct kick. 198

Golden Right Foot

A powerful kick technique born from Tenya's accelerated reflexes and physical growth.

• First manifested instinctively when he kicked away a zombie-like enemy in the Bio-Toxic Field. 131
• Used against Stain after his personal breakthrough. 198
• Later used to break through walls and eliminate fleeing criminals during the Dark Age. 437

Counter Leg

A defensive kicking technique.

• Deflected a barrage of bullets back at armed criminals. 437
• Later kicked a fired blue bullet back as a warning shot, demonstrating precise control at Emperor-level strength. 438

Engine Burst Ignition

An instant close-range ignition move developed after further training.

• Can be activated immediately in close combat. 414
• Is stated to incapacitate Superhumans near Tenya's level for ten days to half a month. 414

Equipment / Items

• Combat suit — Engine-equipped suit used for high-speed combat and mobility. 437
• Mind-refreshing toothbrush — Given to Tenya by Chiffon; it whitened his teeth and made him feel more energetic. 27
• Yellow Man Toothpaste — Also given by Chiffon; Tenya later credited it with making his body sturdier and strengthening his Engines. 381

Relationships

• Ingenium — Older brother and role model. Tenya inherits the name Ingenium after his brother is incapacitated, treating the title as both a duty and a burden. 3 146 198 437
• Chiffon — Classmate, friend, and early supporter of Tenya's leadership. Chiffon gave Tenya the decisive votes for class president, supplied him with unusual enhancement items, and encouraged him during his crisis against Stain. 25 27 131 198
• Izuku Midoriya — Classmate and trusted ally. They reunite at U.A., work together during missions, and fight alongside one another against Stain. 11 118 198
• Shoto Todoroki — Classmate and combat ally. Todoroki challenges Tenya's revenge-driven mindset and helps him recognize that the original Ingenium would not be consumed by resentment. 118 198
• Ochaco Uraraka and Hanta Sero — Classmates who enabled Tenya's escape from the USJ by stopping Kurogiri at the gate. 36
• Hero Class A — As class president, Tenya repeatedly organizes, encourages, and speaks for his classmates. 25 27 402

Story Role / Major Arcs

• U.A. enrollment and class presidency — Enters Hero Class A, reconnects with Midoriya, proposes a democratic election, and becomes class president through Chiffon's support. 11 25
• USJ Incident — Is assigned by Thirteen to run back to U.A. for help. Despite hesitation and Kurogiri's pursuit, he escapes with assistance from his classmates and activates Engine, boost. 32 36
• Sports Festival — Competes in the cavalry battle and attempts to use Recipro Burst against Chiffon, only to be overwhelmed by Chiffon's greater speed. 97 101
• Early agency missions — Joins Chiffon's team for the Mt. In Village and Bio-Toxic Field missions, where he displays growing professionalism and first manifests Golden Right Foot. 118 131
• Ingenium's fall — After Stain injures his brother, Tenya refuses Chiffon's offered treatment for Ingenium and accepts that he must eventually inherit the hero name. 142 146
• Stain confrontation — Initially driven by revenge, Tenya regains his resolve after Chiffon and Todoroki confront his mindset. He uses Recipro Burst: Golden Calf Rush and Golden Right Foot to fight beside them. 198
• Dark Age enforcement — Officially operates as Ingenium, accepts responsibility for Hosu City's safety, and defeats an armed criminal group with overwhelming Emperor-level power. 436 437 438

Notable Quotes

“Everyone... has entrusted this to me.” 36

“If I don't stand up now, then... I'll never catch up to them again. I'll never catch up to my brother again!” 198

“I'm not a Professional Hero. Technically, I'm still a student, but none of that matters anymore. You have been brought to justice!” 437

Trivia

• Tenya's teeth became so dazzlingly white after using Chiffon's toothbrush that Chiffon jokingly pretended to be blinded by them. 182
• He temporarily stopped using the toothbrush because classmates felt pressured by how white his teeth had become. 381
• He plays Vayne in League of Legends and focuses on team coordination even while gaming. 295