The My Hero Academia manga and anime series features various characters created by Kōhei Horikoshi. The series takes place in a fictional world where over 80% of the population possesses a superpower, commonly referred to as a . People's acquisition of these abilities has given rise to both professional heroes and villains.

U.A. High School students In the series, is a top-ranked academy for training heroes. The school is located atop a forested hill somewhere near Shizuoka Prefecture, Japan. There are four academic tracks, or courses, available to students: Hero, General, Support, and Management. Students who are not accepted into the Hero Course are included in the General Course. However, they can still be transferred into the Hero Course by impressing the faculty at the Sports Festival"Roaring Sports Festival". My Hero Academia, created by Kenji Nagasaki, season 2, episode 2, Bones Inc., 2017. and by making passing grades. As stated by Class 1-A's homeroom teacher, Shota Aizawa, U.A. does not adhere to traditional school methods and allows their faculty to teach their classes however they like. This includes teachers having the authority to expel students for any reason, no matter how minor. Students who are expelled can be re-enrolled, although the expulsion will remain on their permanent records.

Class 1-A students /

The main protagonist of the series, Izuku, is a timid, selfless, and Quirkless teenager from a place near Shizuoka Prefecture who dreams of becoming a superhero. He is initially portrayed as insecure, tearful, vulnerable, and unexpressive, due to years of his childhood friend Bakugo looking down on him for lacking a Quirk. He is also a diligent and strong-willed student, being very enthusiastic about topics related to heroes. His dream drives him to write notes about everything he learns regarding heroes' Quirks and fighting capabilities. He sometimes even surprises the heroes themselves with his vast knowledge. Thanks to this practice, Izuku has developed a keen analytical mind and can quickly form complex battle plans, factoring in the ways he can use the Quirks of allies and enemies alike to best advantage. He helps, or lectures, people with personal and emotional problems, regardless whether it is any of his business, claiming that a hero should meddle in other people's lives. He externalizes his observations by mumbling, a habit that annoys his peers, including All Might. It is implied that he has a crush on Ochaco, as he has been shown to blush around her more than other girls. After attempting to save Bakugo from a villain, All Might chooses him to inherit his abilities and become the ninth user of , a transferable Quirk that allows a hero to stockpile power and thus grants immense strength, speed, stamina, and durability. Eventually, Izuku becomes the first user to manifest a psychic link with the spirits of past One For All users and inherit their Quirks. After nearly a year of school activities and internships, some of which are interrupted by villain attacks, Izuku learns that All for One's apprentice Tomura Shigaraki has become powerful enough to steal One for All. As a result, Izuku decides to leave U.A. in order to combat Shigaraki and his army of villains without endangering his classmates. Prior to leaving, he informs his classmates and several top heroes about One for All, the latter of whom assist him in hunting down the villains.

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Izuku's high-tempered childhood friend turned archrival and classmate in Class 1-A, who is from a place near Shizuoka Prefecture. His Quirk is which enables him to secrete sweat with nitroglycerin-like properties from his hands and ignite it on command to produce powerful explosions. The Ultra Analysis guidebook states that Bakugo describes his own personality as an "abusive egotist". He is a crude, arrogant, short-tempered, and aggressive person, especially at the beginning of the series. Because of his Quirk and talents, Katsuki is very confident and brave, to the point he will go against anyone who challenges him. He never backs down from a fight and will go all out when facing powerful opponents. As a result of, in childhood, having been excessively praised by his peers for his strong Quirk and natural-born talent, Bakugo became very egotistical and disrespectful, especially towards Izuku. Both characters share an emotionally laden history with each other, with Katsuki being unable to overcome his issues with Izuku. However, this has not stopped them from working together, especially during the Final Exams Arc. Katsuki prefers to reflect in silence and solitude, becoming a bit more brooding during those periods. His unchecked pride and aggressiveness frequently cost him victories, as shown during the Battle Trial and the Provisional Hero License Exam, and this worsens when Izuku is involved. Despite having bullied Izuku since they were kids, over the course of the series Katsuki comes to care for Izuku's well-being, especially after learning the truth about One For All. After Izuku leaves U.A. to keep his friends and family safe from All For One, Bakugo finally mends his relationship with him by apologizing to him for his behavior over the years and calling him by his real name. In the Final War arc, Bakugo was assigned to fight in "Coffin in The Sky" by All Might. During his time there he uses his well-developed move ,Cluster, on Shigaraki. Unfortunately he is fatally injured as Shigaraki pierces Bakugo's heart, killing him. Later on, Best Jeanist and Edgeshot, who sacrifices his life to reviveBakugo. Fortunately, their attempts were able to revive him, allowing him to continue fighting Shigaraki with Izuku.

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Ochaco is a bubbly and cheerful girl whose Quirk, , enables her to make any object weightless by touching it with the extended pads on her fingertips. However, overusing this Quirk will cause her to suffer from severe nausea. She is from Mie Prefecture, and is the only student in her class to come from the Kansai region. Horikoshi describes Ochaco as "honest". In a prototype concept made by Horikoshi, Ochaco was originally named Yu Takeyama, the full name later given to Mt. Lady as well as the Quirk. However, Horikoshi thought that it would have made her too powerful. Ochaco has been described as "the most laid back girl" in her class, but she is often blunt without being aware of it. She often becomes amused at certain personality traits others exhibit, bursting into laughter that she tries to suppress. She is the one who inspires and embraces Izuku's hero name, saying that "Deku" sounds similar to "dekiru" (出来る), roughly translating to "[you] can do it". She is a warm individual who often thinks positively but is objective enough to see flaws, as well as virtues. She is empathetic and friendly to those she meets, and will try to help anyone who is kind to her or needs help. Despite her usually cheery manner, she can be determined and focused when the situation calls for it. She has feelings for Izuku, but keeps them private, to focus on her goal of becoming a hero and providing for her parents. Unlike all of her classmates, who use smartphones, Ochaco still owns a flip phone, due to coming from a poor household. In terms of heroism, Ochaco has preferred rescue, admiring Thirteen for the latter's expertise in the area. She is aware of her physical limitations, deciding to choose the combat-oriented hero Gunhead for her internship, to increase her fighting repertoire. Over time, she develops a new sense of battle awareness and becomes a more instinctive fighter. After her classmates successfully bring Izuku back to U.A. and the civilians begin to protest about having to pay the price for the heroes' mistakes, she pleads with the crowd and convinces them to let Izuku rest, as heroes also deserve to be saved.During the Final War arc, she fights Toga on Okuto Island, which is dragged into the Gunga Villa battleground by the awakened Kurogiri. In a near fatal battle with Toga, she is saved by Toga through a blood transplant that kills Toga. In More+ she confesses her feelings to Izuku.

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Shoto Todoroki is a self-composed and aloof student in Class 1-A, who is from a place near Shizuoka Prefecture. His Quirk enables him to generate ice from the right side of his body and fire from the left. He is one of the few students in U.A. High School who received an application through taking the Recommendation Entrance Exam. He was originally cold and aloof as a result of his abusive upbringing and complicated family life, and preferred to keep to himself instead of socializing. He is the youngest child of Endeavor and, as a result of the harsh abuse he suffered, refused to use his left side's powers for years, until Izuku helped him understand that using his fire powers does not mean that he has to accept his heritage. After the events of the U.A. Sports Festival, he notably becomes more sociable and kind, even gaining a sense of humor and occasionally smiling, although still retaining some of his previous distant attitude. After he goes to visit his mother Rei Todoroki in the hospital, their interactions are awkward as a result of how much time they spent apart. He remains relatively cold towards Endeavor and has made clear that forgiveness for his past treatment of him and his mother is difficult; but he has shown concern for their safety. Ever since Endeavor tried to repair his relationship with his family, Shoto has taken a cautious, yet hopeful approach to further development.

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Tenya Ida is the strait-laced president of Class 1-A, who is from Tokyo. His Quirk gives him super speed and superhuman kicking strength from the jet engines in his calves. In the first volume, Horikoshi mentions that Tenya was created during the serialization meeting and that the character and his design ended up deviating from the original concept. Tenya initially appears to be unfriendly and intimidating, but is actually a straightforward, earnest, disciplined, and noble person, although clueless about personal interactions as a result of his elite upbringing. He takes everything seriously and is known for his habit of jumping to conclusions, then enthusiastically speaking or acting based on these conclusions. For example, after Izuku perceives Tenya's true nature during the Entrance Exam, Tenya sees him as a worthy peer and has since held him in high esteem. As Class 1-A's president, Tenya is obsessed with organization and discipline and expects his classmates to follow suit, which often annoys them. He is also humble and willing to admit to his mistakes, apologize for his behavior, and improve himself in areas he is lacking. Being a member of the highly esteemed Ida family, Tenya is proud of his lineage and works hard to meet high expectations. He admires his older brother Tensei, and aspires to become a hero like him. After Tensei is forced to retire, after being critically injured by the Hero Killer Stain, Tenya takes up his mantle.

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