Katsuki Bakugo

Shoto Todoroki (轟とどろき焦しょう凍と Todoroki Shoto?) is a student at U.A. High School. He is characterized as a cold and quiet boy due to the traumas of his childhood. He is the son of the current number one hero, Endeavor, whom he despises. He has the power of ice on his right side, inherited from his mother, and fire on his left, inherited from his father. He also has a burn on the left side of his face, inflicted by his mother when she threw boiling water on him, due to the association of that part of his body with the abuse he suffered at the hands of his father. For this reason, Todoroki swore never to use his fire powers, demonstrating his rejection of his father. Despite this, thanks to his classmate Midoriya, he begins to use them again.

Katsuki Bakugo (爆ばく豪ごう勝かつ己き Bakugō Katsuki?), also known as the God of the Great Killing Explosion Dynamight (大爆殺品 Daibakusatsushin Dainamaito?), or simply Dynamight, is a student at U.A. High School. He possesses the ability to create explosions using the nitroglycerin secreted by his sweat glands, primarily those in his hands. He behaves arrogantly, as he was treated as superior to others as a child. He has known Deku since they were very young, but when they turned four, Bakugo stopped being his friend upon realizing that Deku didn't possess a Quirk. This is why Deku is his main rival, although over time their relationship improves, eventually developing into a friendship based on rivalry.

Izuku Midoriya (緑みどり谷や出いず久く Midoriya Izuku?), also known as Deku (デク Deku?), is a student at U.A. High School and the protagonist of the story. He never manifested a Quirk, which led to him being bullied in childhood and portrayed as insecure; however, this didn't stop him from dreaming of becoming a hero. He is a huge fan of All Might, the number one hero and symbol of peace for the world. He is a very helpful and polite boy, but he can be quite shy at times and overreacts in certain situations. As a hero fan, Izuku has a habit of writing down every single aspect of the different heroes he meets throughout the story, developing excellent analytical and observational skills through endless muttering, something that annoys or frightens his classmates. He is Katsuki Bakugo's rival, who has constantly mocked him for his aspirations to be a hero, but who, when facing him during the trial battle, gradually transformed into a more confident and courageous person, to the point of developing some leadership skills.