mg (milligram)

Izuku Midoriya (Deku), the main character, was born quirkless, but through perseverance, he gained the power of "One for All" from All Might. He is driven, analytical, and willing to take risks.

Katsuki Bakugo is Izuku's classmate and rival. His Quirk, "Blast Wave," allows him to release flammable sweat from his palms, causing objects to explode. He's self-assured, has leadership qualities, and is rude and arrogant.

Shoto Todoroki is the son of the hero Endeavor. His Quirk, "Hellfire," grants him control over fire, while the left side of his body allows him to manipulate ice. Reserved and serious, he strives to surpass his father.

Ochaco Uraraka is a positive and energetic girl who dreams of becoming a hero. Her Quirk, Zero Gravity, allows her to neutralize gravity on small objects upon touching them. She's friendly and helpful.

Tenya Iida is a student at U.A. Academy. His Quirk, "Drive," is embedded in his legs, granting him super speed. He is honest, determined, and serious, and takes his responsibilities seriously.

All Might (Toshinori Yagi) is a symbol of peace and possesses the Quirk "One for All," which grants him superhuman strength, speed, and endurance. Due to severe injuries, he can only maintain his heroic form for three hours, after which he degenerates into a frail human.
and others

Villains
Tomura Shigaraki is the leader of the League of Villains and the successor to All for One. His Quirk, "Disintegration," allows him to destroy anything he touches. Initially limited to direct contact, after gaining the power of All for One, he became capable of obliterating entire city blocks.

Himiko Toga is a sadistic villain. Her Quirk, "Transformation," allows her to take the form of a person whose blood she has drunk. Over time, she has learned to copy the Quirks of those she transforms into.

Dabi (Tōya Todoroki) – hates Endeavor's father due to his childhood abuse and joined the League of Villains. His Quirk, "Blue Flame," allows him to create and manipulate extremely hot flames.

Kurogiri is a member of the League of Villains whose body is composed of dark mist. He is capable of opening portals to teleport himself and others.