The U.A. Development Studio is a workshop dedicated to Hero costume adjustments. It is located on the first floor of U.A. High School's main building and is managed by the Pro Hero Power Loader. The room is filled with various tools, materials, and machinery used for costume development.

Reiko Yanagi is a student in Class 1-B at U.A. High School. She has chin-length, pale gray hair which is parted to the left, obscuring the left side of her face. She has dark bags under her dark blue eyes. Reiko is a quiet and emotionless teenager. She is quite verbose with her wording. Her Emitter-type Quirk allows her to telekinetically control nearby objects.

Villains are people who use their Quirks to fulfil their evil desires; committing crimes, causing destruction, and potentially put innocent lives at stake. Some villain groups exist, such as the League of Villains. All For One is the most powerful and infamous villain in Japan. He is the arch-nemesis of All Might, the most powerful and popular pro hero in Japan.

Ground Beta is one of the training areas located in U.A. High School. Ground Beta is a training course that emulates a standard urban area, with streets and buildings. Several of its buildings also contain monitoring rooms in their basements, where indoor exercises can be observed.

Ground Gamma is a training area in U.A. High School. Ground Gamma consists of an industrial site compiled by many factories that form a labyrinth. The labyrinth contains tons of heavy machinery including cranes and pipelines.

Nemuri is a Pro Hero and a faculty member at U.A. High School. She is a tall, curvaceous woman with blue eyes. She has long, spiky dark purple hair which reaches down below her waist. Nemuri is a very playful and flirtatious person with an unpredictably serious and temperamental side to her. She has no shame for dressing or acting sexually in front of young U.A. High School students. She wears a breastless, black leather leotard over a thin, skin-tight white bodysuit which accentuates her voluptuous figure. Her Pro Hero name is Midnight.

Mei Hatsume is a student of U.A. High School's Support Department, in Class 1-H. She is a short girl with a curvy build, and has shoulder-length salmon pink hair. Mei is a smart, off-setting, and assertive girl, often making those around her uncomfortable. She loves creating gadgets, which she refers to as her "super cute babies". She is very shameless and opportunistic when it comes to advertising her inventions. She is very smart and innovative, creating many different pieces of equipment on her own that can help her in many situations.

U.A. High School's P.E. Grounds are an exercise field where Hero Course students can train their Quirks and participate in fitness tests. The P.E. Grounds consist of various locations for various fitness tests. This includes a running track for the 50-meter dash, a sandpit for the long jump, and a pitching circle for the softball throw. These locations are each equipped with a robotic proctor that measures a student's success in each test.

Hosu City is a city district located to the west of Tokyo. Besides the Hosu General Hospital, the ward does not have any other known landmarks. The Pro Hero Ingenium is known to act in this district, as well as Manual and Endeavor.

Kamino is a ward in Yokohama City.

U.A is the #1 ranked high school for heroics and is considered as the top Hero Academy in Japan. Students are separated based on their abilities into specific Departments and Classes. Each year, only a limited number of students can enter, and they must pass two tests to enroll. Students learn everything they need to know to become excellent heroes in service of the community and work towards the qualifications necessary to be allowed to use their Quirks in public spaces. Various Pro Heroes teach at this school.

Musutafu is a large city in Japan. It is where U.A. High School resides.

Ochaco Uraraka is a student in Class 1-A at U.A. High School. Ochaco is a short, fair-skinned girl with a slender yet curvaceous figure. Her hair is brown and bobbed and curved inwards at the ends. Ochaco is very bubbly and kind of an airhead at times. She is a very warm, lively individual who thinks about everything positively. Her Emitter-type Quirk gives her the power to make objects and people become weightless by touching them. She is able to cancel the effect of her Quirk by touching her fingers together.

Kurogiri is a villain under All For One's command. Kurogiri is a member of the League of Villains, and is intensely loyal to both All For One and Tomura Shigaraki. Kurogiri's entire body is made out of a dark purple mist, except for his eyes, which are glowing yellow. He wears an elegant suit with a tie and has a metal brace that goes around his collarbone. Kurogiri has a level-headed personality, and is very polite and well-spoken, though he possesses a truly sinister nature. Kurogiri's Emitter-type Quirk grants him the ability to create and manipulate a dark fog from his head and hands, which acts as a portal to another location.

UA High is the most prestigious and popular superhero school to train people into becoming superheroes. Students have to attend this academy for three years before they graduate and become a full-fledged hero.

Kyoka Jiro is a student in Class 1-A at U.A. High School. She is a petite, fair-skinned girl with short, dark purple hair, and a slender build. Kyoka has an unenthusiastic and teasing personality, though she does enjoy socializing with others. Kyoka has a major interest in rock music and owns several instruments which she is able to play to some extent. Kyoka's Mutant-type Quirk grants her a pair of headphone jacks hanging from her earlobes. When the jacks are plugged into something, Kyoka can channel the sound of her heartbeat through them in the form of a violent vibration attack.

Mina Ashido is a student in Class 1-A at U.A. High School. Mina is a girl of medium height with an athletic body. Due to her Quirk, her skin is a light shade of pink, and has eyes with a black sclera and yellow irises. She has short and messy pink hair, with two small yellow horns vertically protruding from her head. Mina is a cheerful, sociable, and energetic girl who displays a smile on her face most of the time, and loves to hang out with her friends. Her academic performance is quite poor. Her Emitter-type Quirk allows her to create corrosive liquid from her skin, her skin being naturally resistant to the acid she produces.

Emitter-type Quirks are abilities that allow the user to generate and possibly control certain things, or alter existing things around them in certain ways. The emissions of Emitter-type Quirks can have a wide variety of properties and abilities. Emitter-type Quirks can also have various ranges; while some users require physical contact to use them, others can have much longer ranges with no distance restrictions. Emitter-type Quirks are the most common type of Quirk.

Quirks are a special, superhuman ability an individual can possess. Quirks are generally unique to their user, and are classified in these categories; Emitter, Transformation, and Mutant.

A Quirk is a superhuman ability that a person can possess. Quirks are unique to each individual, though every person is limited to only one Quirk. The body of a Quirk user has natural adaptations to protect itself from any damage the Quirk might do to them without these natural defenses. Quirks are sorted into 3 categories: Emitter, Transformation, and Mutant.

The League of Villains, or the Villain Alliance was a villain organization made up of powerful villains that threaten to destroy the Hero society. The League was founded by All For One and was led by Tomura Shigaraki.

Ryukyu is the number 10 hero. Her quirk is called Dragon. yuko's Quirk gives her the ability to transform into a large western dragon. This form grants her superhuman strength and durability, powerful jaws and claws, and wings that allow her to fly.

Her hero costume consists of a dark red, traditional qipao with a pale green scale trim around her shoulders, which seems to only be slit on the left side, with yellow claw patterns on the bottom and smaller ones around her neck.

Endeavor is the new Number One Hero, after All Might retired. He has a quirk called Hellflame, which allows him to control extremely hot flames in many ways.

His hero costume is comprised of a tight, navy turquoise bodysuit with lines of flames streaming across his chest, upper torso, arms, and most prominently his shoulders. He uses his flames as a makeshift mask around his eyes.

The Unforeseen Simulation Joint is a training facility located in U.A. High School. Its purpose is to train students in the Hero department for disaster rescue. The facility consists of a dome-shaped building composed of eight main sections, with six of them emulating a particular disaster scenario: the Ruins Zone, the Landslide Zone, the Mountain Zone, the Conflagration Zone, the Flood Zone, and the Downpour Zone.

Heroes are individuals who are licensed to use their Quirks to protect civilians from Villains, natural disasters, and/or other kind of harm. Those who take heroism as a profession are referred to as Pro Heroes. Heroes generally work in groups known as Hero Agencies: the standard is one powerful Pro Hero in charge, and a number of weaker Heroes who serve as Sidekicks under the command of the primary Hero. An agency operates out of an office building which serves as their base of operations.

Transformation-type Quirks are abilities that cause the user to take on a temporary alteration of some kind. They allow the user to temporarily transform their body in a variety of manners, sometimes enhancing existing features, removing features, or adding new features to the body altogether. Transformation-type Quirks usually require a close-range proximity in order to fully utilize them in combat due to them only affecting the user's body. Transformation-type Quirks are often quite powerful, but their biggest weakness is that their effects are often temporary, and over-exertion usually leads to negative repercussions on the user's behalf. Transformation-type Quirks are the least common type of Quirk.

Quirkless is a term used to refer to someone who was born without a Quirk. Quirkless individuals are considered to be weak and worthless, and are often discriminated against by people with Quirks. Quirklessness is extremely rare.

Izuku Midoriya is a student in Class 1-A at U.A. High School. Izuku is somewhat short for his age, has a toned physique, and has short and messy dark green hair. Izuku is a very timid, reserved, and polite boy. He is also quite analytical and strong-willed, and has an extremely strong sense of justice and innate heroism; never hesitating to help or rescue someone in danger. He has a freakish fascination with Heroes and is an extreme fanboy of All Might. His Quirk grants him significantly enhanced physical abilities, resulting in unbelievable levels of strength, speed, stamina, agility, and durability.

Yui Kodai is a student in Class 1-B at U.A. High School. Yui is a young girl with shoulder-length, bob-shaped hair, side-swept to her right. She has fair skin, an athletic build, cerulean eyes, and she's usually seen wearing a neutral expression on her face. Yui is a quiet girl that rarely expresses any emotions, but despite her silent demeaner, there are individuals that she truly cares about. Although she rarely talks and has no expression, Yui isn't moody. Her Quirk grants her the ability to alter the size of nonliving objects that she has touched.

Katsuki Bakugo is a student in Class 1-A at U.A. High School. Katsuki is of average height, with a slim, muscular build, and a fair skin tone. He has short and spiky ash-blond hair, and his eyes are sharp and bright red. Katsuki is a crude, arrogant, short-tempered, and aggressive person. He often showshostility towards Izuku Midoriya and used to bully him in his early childhood days. He's very athletic and talented at fighting, and is also very intelligent and extremely perceptive. His Quirk allows him to excrete sweat from his palms and ignite it at will to create powerful explosions of various sizes.

Momo Yaoyorozu is the Vice President of Class 1-A at U.A. High School. She is tall, has long black hair that is tied into a spiky ponytail, and has a voluptuous physique. Momo is a very prudent, dedicated person who acts as a natural leader towards her classmates. She is generally level-headed and calm in dangerous situations. She is a genius, and her analytical skills are strong, easily devising strategies and plans in battle and urgent situations. Momo's Quirk gives her the ability to create any non-living material or object from her exposed skin.

The Sports Festival Stadium is the stadium where the U.A. Sports Festival takes place. It's located inside the U.A. High School campus. The arena of the stadium consists of a circular space with a flat square of red concrete in the center, surrounded by grass. The stadium features a branch nurse's office as well as waiting rooms for the participants.

Shoto Todoroki is a student in Class 1-A at U.A. High School. He is the youngest son of the Pro Hero Endeavor. Shoto is tall and muscular, and is well-built for his age. Shoto has a cold and aloof personality, which stems from his abusive upbringing. He has short hair which is evenly split between two colours: white on his right side, and red on his left. Shoto's Quirk gives him the ability to generate ice from the right side of his body, and flames from his left side. Shoto has a deep loathing for his fire abilities and therefore never uses them, as they symbolize his father's wickedness towards him.

Himiko Toga is a member of the League of Villains. She is 16 years old, and is a psychotic and homocidal villain. She is a petite, fair-skinned girl, with dirty ash-blonde coloured hair which is styled into two messy buns. She is very prone to blushing out of excitement. She is a very cheerful girl, to the point of smiling even after having killed someone, displaying sadistic tendencies. Himiko is mentally unstable and has a very twisted perception of love and friendship, perceiving bloody individuals as her ideal lover. Himiko's Transformation-type Quirk allows her to transform into an identical copy of another person after consuming some of their blood.

Shota Aizawa is a Pro Hero and the homeroom teacher of U.A. High School's Class 1-A. Shota is a pale man with messy, shoulder-length black hair. His facial hair is unkempt, and his eyes always look tired. He comes off as blunt, stern, and impatient, but he genuinely cares about his students and will go to great lengths to protect them. Shota's Quirk gives him the ability to disable another person's Quirk for as long as he is looking at them. Eraser Head has demonstrated incredible combat prowess and ingenuity that makes him one of the most formidable Pro Heroes. His Pro Hero name is Eraser Head.

All For One is Japan's most powerful villain, and is All Might's arch-nemesis. He possesses short and messy white hair, and crimson eyes. All For One is a sadistic and malevolent man that likes to rule from the shadows, and enjoys himself at the expense of other people. He has a firm contempt for ideals of justice and morality, dismissing them as beliefs of other people that shackle personal freedom. Due to his immense power and confidence, All For One has a calm and condescending demeanor. All For One's Emitter-type Quirk allows him to steal other people's Quirks through direct contact, allowing him to wield the stolen Quirks as his own, and leaving the victims Quirkless.

Mutant-type Quirks are abilities that cause the user a permanent abnormality directly related to their power. Mutant-type Quirks create bodily structures that grant the user more complex abilities that Emitter and Transformation Quirks cannot safely provide. They will often bestow prehensile appendages that the user can control or add structures to pre-existing limbs to enhance pre-existing abilities. Mutant-type Quirks even have the ability to channel certain aspects of their user through them.

All Might is Japan's strongest Pro Hero. All Might is a very large and charismatic man with a muscular and well-defined physique. He has bright blue eyes and short blond hair, swept backwards, with two long tufts that stick up above his head. He is exuberant, extremely friendly, and is always smiling due to his popularity and years in the spotlight. He has extremely strong willpower and always prioritizes the lives of others over his own, considering them his responsibility. All Might's Quirk grants him significantly enhanced physical abilities, making him strong enough to destroy city blocks. He teaches Foundational Hero Studies at U.A. High School.

Ejiro Kirishima is a student in Class 1-A at U.A. High School. Eijiro is a muscular young man of average height and a rather impressive physique for his young age. He has red eyes and pointed teeth. He has short and spiky crimson hair. Eijiro is a boisterous and outgoing guy with a fondness for the concept of manliness. Eijiro is very honest and kind-hearted, having a straightforward way of thinking and following a specific code of chivalry that motivates him to live without regret. Eijiro is determined and selfless, bravely putting the safety of others before himself. His Transformation-type Quirk gives him the power to significantly harden and sharpen any or all parts of his body, causing his flesh to become jagged and rock-like.

Denki Kaminari is a student in Class 1-A at U.A. High School. Denki has yellow eyes and short blonde hair, parted to the right with a black lightning-shaped streak on the left of his side fringe. He's less muscular than most of the other male students in his class. Denki is a friendly, social, and energetic boy who likes to socialize with his classmates, and is rather casual when interacting with others. Denki is not very academically bright, requiring massive help at studying due to his general disinterest and neglect of school duties. His Emitter-type Quirk allows him to generate electricity and cover his body in it. He cannot control the electricity generated.

Tenya Ida is a student in Class 1-A at U.A. High School. He is the younger brother of the Pro Hero Ingenium. Tenya is a relatively tall and muscular young man. He has short dark blue hair, flattened neatly down and parted on the right side of his head. He has crimson eyes and wears glasses. Tenya is a very intelligent, sophisticated, stern, and disciplined individual, although he's a bit clueless about personal interactions due to his elite upbringing. Tenya's Mutant-type Quirk gives him car-like engines in each of his calves, giving him incredible running speed and extreme kicking power.

The Sports Festival is an annual event held by U.A. High School where students from all grades and courses have the opportunity to showcase their skills and abilities in different competitions in order to be scouted by Pro Heroes and support agencies.

Tartarus is a prison extremely distanced from civilization where extremely dangerous villains are imprisoned and interrogated under the highest security standards possible.

The League of Villains is a villain organization made up of powerful villains that threaten to destroy the Hero society. It was founded by All For One and is led by Tomura Shigaraki.

Class 1-B is a homeroom class comprised of freshmen in U.A. High School.

Class 1-A is a homeroom class comprised of freshmen in U.A. High School. Class 1-A's homeroom teacher is Shota Aizawa.

There are 3 quirk types in the world:

Emitter

Transformation

Mutant

Fukuoka is a city in Kyushu, Japan. It is the base of operations of the Hawks Agency which is ran by the Pro Hero Hawks.

Wash is the number 8 hero. They have an unnamed water quirk. Wash’s Quirk allows him to create and control soapy water from his head. The stream is strong enough to keep several people in the air. Wash can also use the Quirk to generate large soap bubbles that he uses to envelop targets and make them float.

His hero costume resembles a washing machine.

Kumui Woods is the number 7 hero. His quirk is called arbor. His Quirk allows him to enlarge and control his wooden body parts into strong tree branches. These branches are excellent for binding. Being made of wood, this Quirk is at a disadvantage against fire.

His face is unknown since he wears a mask. His Hero Costume is a dark blue bodysuit that includes a wooden belt, wooden knee pads, and wooden shoes. A small bundle of roses hangs from the left side of his belt.

Crust was the Number 6 hero. Crust's Quirk allowed him to grow stone-like hexagon-shaped shields from his body. He used these shields to protect himself and others. He could expand these shields to a large size and in different directions. The edges of the shields could also cut through obstacles as an offensive attack, and pieces of it can be detached and thrown for the same purpose.

Crust is deceased.

Mirko is the number 5 hero. Her quirk is called Rabbit, which gives her the attributes and abilities of a rabbit. This grants her incredible leg strength, allowing her to jump and kick with extreme force. She also has excellent hearing, and possess animal instincts that alert her to nearby danger.

Her hero costume consists of a sleeveless white leotard with dark purple trim around her shoulders and waist, a wide, yellow crescent moon design over her chest.

Edgeshot is the number four hero. His quirk is called foldabody, which allows him to make his body and limbs extremely thin and long, effectively allowing him to transform himself into a razor-sharp string. He is able to transform faster than the speed of sound.

Shinya's hero costume adapts the appearance of a traditional ninja. He wears a blue mask that covers his mouth tied with red yarn. Shinya sports red shinobi shozoku underneath a blue robe.

Best Jeanist is the number three hero. His quirk is called Fiber Master, which allows him to freely manipulate the threads in any nearby piece of fabric. His Quirk works best with denim and is least effective on sweats.

His hero costume consists of a pair of jeans, a denim waistcoat with two large breast pockets, and a denim dress shirt with a very high collar which covers his face up to just below his nose.

Gang Orca is the number 12 hero. His quirk is called Orcinus. Which gives him the attributes and abilities of a Killer Whale. He has enhanced strength and heightened senses; he can also produce hypersonic waves to paralyze his targets. He can use his abilities on land, although his Quirk is superior in the water.

His upper body resembles that of a Killer Whale.

Hawks is the number two pro hero. His quirk is called Fierce Wings, the Quirk grants him a pair of large, bright red, feathery wings on his back. These wings allow him to fly, and he can telekinetically control the movement and nature of each individual feather with ease, enabling him to harden them into a blade-like state and/or shoot them as projectiles.

Yoroi Musha is the number 9 hero. He has an unknown quirk.

Yoroi Musha is an elderly-looking man with a long white beard and pale orange eyes. His Hero Costume is a full set of Japanese armor with a red cape wrapped around his torso. His helmet notably has one large horn pointing upwards.