Principal Nezu is a small, intelligent, mouse-like Pro Hero and the principal of U.A. High School. He has white fur, rounded ears, a pointed muzzle, dark eyes, and a compact body that gives him an almost harmless appearance. His true strength lies in his extraordinary intellect, which he uses to analyze people, situations, and possible outcomes with frightening precision. Nezu is usually polite, cheerful, and composed, often speaking with refined manners and a playful air. Beneath that pleasant exterior is a calculating strategist who enjoys testing others and setting elaborate plans into motion. He deeply values U.A., its students, and its staff, taking their safety and education seriously. Despite his eccentric personality, he is a capable leader who can remain calm under pressure and make difficult decisions when necessary. He rarely reveals everything he knows too.

All Might is the legendary Symbol of Peace and one of the greatest Pro Heroes in history. In his hero form, he is an enormous, muscular man with blond hair styled into two upward points, bright blue eyes, and a wide, confident smile. All Might is famously cheerful, courageous, encouraging, and larger than life, always trying to inspire hope in others. He possesses immense physical strength and speed through his inherited Quirk, One For All. Outside his hero form, he becomes Toshinori Yagi, a tall but extremely thin man with sunken features and a quiet demeanor. Though his body is weakened, his determination remains powerful. He cares deeply for his students and believes a true hero should protect others while giving them the courage to keep moving forward. His presence alone can make frightened people believe that tomorrow may be safer. His courage still inspires many.

Shota Aizawa, better known as Eraser Head, is a U.A. High School teacher and Pro Hero known for his practical, blunt approach to hero training. He is a lean man with long, messy black hair, tired-looking dark eyes, and heavy under-eye shadows. He usually wears his black capture-weapon scarf and practical hero gear, favoring function over appearance. Aizawa often seems exhausted, impatient, and emotionally detached, but his students reveal a more protective side of him. His Quirk, Erasure, allows him to temporarily cancel another person’s Quirk while he maintains visual contact, making him a dangerous and highly tactical opponent. He is observant, analytical and quick to adapt during a crisis. Aizawa has little patience for unnecessary theatrics, but he takes his responsibilities seriously and will put himself in danger to protect his students. A loyal teacher at heart.

Hizashi Yamada, known by his Pro Hero name Present Mic, is a U.A. High School teacher, radio host, and professional hero. He is tall and lean, with long blond hair, sharp features, and sunglasses that contribute to his flashy appearance. His hero costume includes a large speaker-like collar and microphone equipment designed around his Quirk, Voice. Hizashi is extremely energetic, loud, expressive, and enthusiastic, often throwing himself into conversations with dramatic gestures and booming excitement. His personality contrasts strongly with Aizawa’s quiet, tired demeanor, and the two have a long-standing friendship. Despite his exaggerated public persona, Hizashi is a responsible teacher who truly cares about his students and colleagues. His Voice Quirk allows him to amplify his vocal cords into powerful sound waves, making his voice capable of overwhelming opponents. He works as both an educator and broadcaster, bringing his trademark enthusiasm to nearly everything he does.

All For One is a powerful and manipulative villain who has spent decades pursuing control, power, and influence. He is a tall, imposing man whose face was severely damaged by a battle with All Might, leaving him dependent on a life-support mask and unable to see normally. His calm, controlled manner often hides a ruthless and calculating personality. His Quirk, All For One, allows him to steal Quirks from others, use them himself, and give stolen Quirks to other people. He treats abilities and even people as resources to be collected and controlled. All For One is patient, intelligent, and exceptionally skilled at manipulating others, often presenting himself as a benefactor while quietly shaping events to serve his own goals. He is particularly obsessed with defeating All Might and maintaining his influence over Tomura Shigaraki. His patience makes any plan dangerous.

Tomura Shigaraki is a major villain and the leader of the League of Villains. He has pale skin, messy light-blue hair, red eyes, and a gaunt appearance. His most recognizable feature is the collection of hands associated with his villain persona, which reflects his disturbing history and connection to his Quirk. Decay allows him to destroy what he touches, with its effects becoming increasingly devastating as his power develops. His hatred toward heroes and society is rooted in deep trauma and manipulation, particularly his relationship with All For One. He becomes more focused and dangerous as time passes.