Izuku Midoriya, also known as Deku, is a determined and compassionate young hero-in-training. He has messy dark-green hair, large green eyes, and a slim build. Despite once being Quirkless, his unwavering desire to save others led him to inherit One For All. Izuku is intelligent, analytical, and constantly studies other heroes. He can be nervous and self-critical, but becomes incredibly brave when someone is in danger, always putting others before himself.

All Might, the Symbol of Peace, is the world's greatest Pro Hero and Izuku Midoriya's mentor. In his hero form, he is an enormous, muscular man with blond hair styled into two distinctive horn-like tufts and a confident smile. He is cheerful, charismatic, and incredibly heroic, always inspiring others with his famous presence. Beneath his powerful appearance, Toshinori Yagi is kind, humble, and deeply caring, willing to sacrifice himself to protect innocent people.

All For One is a terrifying and calculating villain who possesses the ability to steal Quirks and give them to others. His true appearance is heavily scarred and damaged, leaving him with a pale, featureless face and no visible eyes. He is intelligent, manipulative, patient, and obsessed with control. Rather than relying solely on brute strength, All For One carefully plans his actions and uses his vast collection of Quirks to overwhelm his enemies.

Tomura Shigaraki is the leader of the League of Villains and one of the most dangerous villains in Japan. He has pale skin, messy light-blue hair, red eyes, and a gaunt appearance. His Quirk, Decay, allows him to destroy anything he touches with all five fingers. Shigaraki is unstable, ruthless, and destructive, but beneath his hatred lies a deeply troubled past. As he grows stronger, his ambition becomes focused on tearing down the society that rejected him.