Izuko Midora

Genki Itzuko, also known as Deku (デク), is the primary protagonist of the My Future Academia manga and anime series.

Though born Quirkless, Genki manages to catch the attention of the legendary hero Izuku Midoriya due to his innate heroism and a strong sense of justice and has since become his close pupil as well as a student in Class 1-A at U.A. High School. Izuku passed on his Quirk to Genki, making him the tenth holder of One for All.

Abilities
Overall Abilities: Genki’s greatest asset prior to receiving his Quirk was his vast knowledge of fundamental hero skills and tactics. Genki studied Pro Heroes for years and is able to apply that knowledge during crisis situations in a practical manner. His immense bravery and desire to become a hero were also important factors in giving him the mentality to protect others. Before gaining his Quirk from Midoriya, he took on the Blood Villain and rescued Haruki because of his boldness and application of heroic skills, something that deeply impressed the then No. 1 Hero.

Having been trained by Midoriya for 10 months in order to get his body physically ready to inherit One For All, Genki gained a muscular physique that lets him perform at parameters higher than that of an average student outside the U.A. hero course. During the Quirk Apprehension Test, he demonstrated a grip strength of 56 kilograms and the ability to run the 50-meter dash in 7.02 seconds (15.93 mph/25.64 kph).

After inheriting One For All from Deku, he was granted the ability to harness a stockpile of powerful energy. He can move faster than the eye can see and take down an enormous villain bot in a single punch, but the physical backlash at the time prevented Genki from being able to fight properly or compete with his peers on an even playing field. Even so, he still possessed impressive physical durability, and his drive allowed him to withstand the drawbacks of One For All for the most part.

Despite the intense drawbacks of One For All, Genki's wits provide him with ways to use One For All that is still effective in battle. He also retains his ability to act instinctively based on his notes and possesses basic hand-to-hand combat knowledge. By applying those correctly, Genki is able to fight toe-to-toe with even the strongest students of Class 1-A, such as Katsuki and Shoto.

Under the tutelage of Haruki, Genki acquired more control over One For All, leading to the creation of the New York Smash, a technique that would eventually become a key component of his fighting style. With Genki gaining greatly enhanced maneuverability, strength, and a significant reduction in the physical backlash created when using his Quirk uncontrollably, he was able to drastically improve his overall fighting capabilities; his newly attained abilities garnered praise from Gran Torino, who noted that Genki was on a higher level than he was compared to the Sports Festival. This specific improvement enabled Genki to compete more closely with his classmates in the physical aspects of the Hero Course and even allows him to fight properly against top Villains like the Blade, who had single-handedly bested various Pro Heroes.

As Genki's mastery over his Quirk improves, so do his practical skills. Also, when his skills and experience increase, so does his confidence, which is said to be a source of inspiration to his classmates as well. His body, however, still remains relatively vulnerable to One For All's drawbacks, which gives Genki a disadvantage against enemies like Crusher or Overhaul, whose Quirks were proven to be too powerful against One For All's weaker outputs, forcing scenarios where Genki had to sacrifice his body in order to go all out. In order to protect his own body, particularly his arms, Genki eventually develops his own unique super move, diverging himself further from Midoriya's.

Currently, Genki is acknowledged by his classmates as a strong, reliable, leading figure, with both his strength and intelligence being respected equally. However, Genki's Quirk is still an enigma for them (including Genki himself), which makes him an unpredictable ally for better or worse. As Genki keeps growing, so does One For All, and with the prospect of having new abilities unlocked in the future, Genki has to work even harder in order to fully dominate the Quirk that was passed to him.

Trained Muscles: Usage of One For All requires the user to have strong muscles, as One For All is a lot to handle and could cause the user's body to be blown apart if they don't possess the necessary bodily strength.

Enhanced Stamina: Genki has shown on many occasions that he is capable of handling large amounts of pain. Such times were mostly side-effects of overusing his Quirk and frequently led to various broken bones. Genki is able to avoid those repercussions by staying in a safe range of One For All power output (currently, this is around 45%).

Should he be forced to output more power, Genki is still capable of fighting decently even with broken limbs thanks to the effects of adrenaline, but will succumb to exhaustion a while later. Genki also has to be wary of his arms, which have grown weary due to his repeat injuries and could eventually stop working altogether if he doesn't restrain himself.

Keen Intellect: Genki has proven to be exceptionally intelligent on many occasions, displaying both keen observation and analysis as well as adept intuition and resourcefulness. His grades are among the highest of his class, showing that his One For All training rarely interferes with his studying. Genki's intelligence has probably been a more useful asset to him than One For All so far.

Genki is a quick learner, which has helped him figure out most One For All's mechanisms in a short span of time and work around its limitations. While some of his moves have been directly inspired by Midoriya (if not, outright copied), the majority of Genki's moves and techniques were all conceived by him during sudden sparks of inspiration, a proof of his creativity.

Genki also has extensive knowledge of Pro Heroes, his classmates, and their Quirks, taking notes of them in great detail in his Hero Analysis for the Future. This is fruit of excellent observational skills coupled with his own desires in becoming a hero by learning from the best, meaning that Genki always has a natural interest in expanding his knowledge further and further.

Genki is an exceptional strategist and tactician. By combining his aforementioned quick learning and knowledge about Quirks, Genki is able to devise plans that take advantage of his friends' abilities to the fullest. Genki's calculations have been crucial at several moments of his school life, allowing him to earn victories (like the Battle Trial), escape dangerous situations (the U.S.J. Incident) and save lives (the Vanguard Action Squad Invasion and Kamino Incident).

His intelligence is greatly respected by everyone in Class 1-A as many of his peers look up to him for planning and follow his strategies to the bottom line. Even Masami Yayashiro, the smartest student in the class, has looked up to Genki as a reference.

Leadership Skills: As a natural consequence of his bravery and strategic mindset, Genki has displayed incredible leadership skills on various occasions.

By the start of his U.A. High School life, Genki had already earned the trust of Mizuki Camacho and Chino Ijiro thanks to his actions in the U.A. Entrance Exam, which was enough to allow him to be voted class representative early on (having relinquished the position to Chino shortly after). and Tsuya Akari also Yoshiro Yagima placed their faith on Genki during the U.S.J. Incident, following his instructions with little hesitation. By the time of the First Term Final Exam, he had already fought alongside Haruki and Kenji, who were previously antagonistic to him.

Genki might not be aware of this, but he is one of the main motivators within his class alongside Katsuki, thanks to a combination of his heroic drive and practical intellect.

Quirk
One For All (ワン・フォー・オール): Transferred to him from Izuku Midoriya, Genki's Quirk allows him to stockpile an enormous amount of raw power, allowing him to significantly enhance all of his physical abilities to a superhuman level. This results in unbelievable levels of strength, speed, agility, and durability.

Genki can focus the stockpiled power into a single body part, or spread it across his entire body evenly, though, focusing the power in a single part puts a greater strain on that part of his body. He is also able to control what percentage of his full power that he uses. He is currently able to handle 45% of his full power without breaking his bones, with 30% being his normal output.

The Quirk factors of the previous power holders have merged with the core of One For All and have drastically increased in strength since. This grants Genki the ability to access and utilize the Quirks of the previous holders of One For All. The known Quirks within One For All are:
 * Blackwhip: The Quirk of the fifth user, Daigoro Banjo. This Quirk allows Genki to generate tendrils of black energy from his arms that are good for grappling. It is useful for grabbing things from long distances, as well as increasing Genki's mobility.
 * Float (浮遊): The Quirk of the seventh user, Nana Shimura. This Quirk allows Genki to levitate and suspend himself in mid-air.

Genki has also displayed a type of mental connection to the previous holders of One For All.

Trivia
According to official sources, Genki is 16 years old, is 5'7" (170 cm).