After attempting to save Bakugō from a villain, Izuku, an initially Quirkless boy, is chosen by All Might to become the ninth holder of One For All(ワン・フォー・オール,Wan Fō Ōru), a Quirk that stockpiles the user's physical strength and unleashes it as a powerful burst; the quirk can also be passed from one person to another. Eventually, Izuku finds out that One for All contains the quirks of the previous users but he becomes the first user capable of manifesting them.While he initially disliked being called "Deku" by Katsuki, as it is based from the Japanese term meaning "good-for-nothing", Izuku is inspired by Ochaco's assumption that it was based on the word dekiru(できる,to be able to/to be capable of)to embrace the moniker and ultimately adopts it as his super name.
A girl whose Quirk "Zero Gravity"(無重力（ゼログラビティ）,Zero Gurabiti)which allows her to make any object she touches with all five of her fingers on one hand to become weightless. Similar to Katsuki, she also refers to Izuku as "Deku". However, unlike the former, she calls him by his nickname out of affection, becoming one of his closest friends. She eventually develops feelings for Izuku, which she has yet to open up about.
Katsuki is Izuku's childhood friend, rival and classmate in Class 1-A, whom Izuku always calls Kacchan. He possesses the Quirk Explosion(爆破,Bakuha)giving his sweat nitroglycerin-like properties at which he can detonate at will. Much like his Quirk, he has an explosive temper and is very volatile with a fierce and competitive drive to achieve authentic victories.
A student in Class 1-A. His Quirk is Half-Cold Half-Hot(半冷半燃,Hanrei Hannen), which allows him to generate ice from the right side of his body and fire from the left. He is the youngest child of Endeavor and he got through U.A via recommendations. Initially, he mostly uses the left side of his Quirk, with an exception for melting his ice, due to his family issues and childhood.
The serious Class representative whose Quirk is Engine(エンジン,Enjin)which gives him super-speed via jet engines in his legs. He was inspired by his older brother, Tensei, who was the first bearer of the name Ingenium. He takes on the name Ingenium after his brother is severely injured by Stain. He quickly befriends Izuku on the first day of school after he thought that he had discerned a few parameters the rest of the examinees did not know for the U.A. Entrance Exam by saving Uraraka during the battle test, without realizing that Izuku had been acting on a whim while doing so.
A girl in Class 1-A. Her Quirk Frog(蛙,Kaeru)gives her afrog-like appearance and abilities such as enhanced swimming abilities, a long, prehensile tongue, the ability to climb vertical surfaces, and superhuman leaping. She later on reveals that she can eject/wash her stomach and undergo camouflage.
Eijirō Kirishima(切島 鋭児郎,Kirishima Eijirō)/ Red Riot(レッドライオット,Reddo Raiotto)
A student in Class 1-A whose Quirk Hardening(硬化,Kōka)allows him to harden his body to become nearly invulnerable. Eijirō struggles with his sense of self-worth, which was exacerbated during an incident in middle school, when his then schoolmate (and future UA classmate) Mina Ashido chased away a giant villain threatening her friends while he stood paralyzed with fear. He is portrayed as crushing on Katsuki Bakugou.
The vice president of Class 1-A, whose Quirk is Creation(創造,Sōzō)giving her the ability to create any non-biological object from the lipids stored in her body as long as she knows its molecular structure. She is the most academically bright in their class and is one of the two students in Class 1-A to attend via recommendations.
A boy whose Quirk is Navel Laser(ネビルレーザー,Nebiru Rēzā)which allows him to fire a laser blast from his belly button. However, he believes his Quirk is "defective" as he always wears a support belt to compensate for its lack of control.
A girl in Class 1-A who has extremely long earlobes due to her Quirk Earphone Jack(イヤホンジャック,Iyahon Jakku)which allows her to plug her them into objects to listen to sounds or transmit the sound of her own heartbeat.