Tomura was a slim young man with pale skin and a great deal of wrinkles around his eyes from scratching at allergies that irritated the surrounding skin since his childhood. His lips were chapped and uneven, with a small mole on the right underneath his lip, and visible scars on his right eye and across his lip on the left. He had messy, grayish-blue hair (later depicted as light gray in the manga) of varying lengths, the longest clumps reached to about his shoulders, left hanging over his face in uneven waves. His eyes and mouth were normally obscured, but when visible, they were usually stretched wide in a rather maniacal manner, with bright red irises looking very small. His quirk is disintegrating people with ALL his fingers.

Himiko was a fair-skinned girl who was prone to blushing and was frequently described as having a pretty face. She had inward-tilting yellow eyes with thin slit-like irises, somewhat resembling those of a cat, with bags under them, and her wide mouth was also rather feline, as her canines were pointed and longer than the rest of her teeth, giving her a vampiric appearance. Her hair was a light dirty blonde color and was styled into two messy buns, with numerous wild strands sticking out, a straight fringe and two chin-length side bangs framed her face. Her usual outfit consisted of a plain seifuku with a Kansai collar, both the skirt and the shirt dark blue with a double white trim, which was paired with a red scarf that she tied loosely below. Over this, she wore an oversized beige cardigan with a long hem and cuffs, and pockets on either side, the right one was shown to hold a number of trinkets on either a keychain or a cellphone strap. She can copy anyone by drinking a little bit of their blood.

Jin was a rather well-built man with blond hair and gray-blue eyes with no eyebrows. He had a large scar splitting his forehead from a past incident. He had visible traces of facial hair over his mouth and at the bottom of his chin. Jin's civilian attire consisted of a blue-collared shirt over a white tank top and a standard pair of pants and boots. His villain costume was a black and gray bodysuit that covered his body completely, along with gray boots. The upper half of his signature mask was gray with white eye sockets, while the lower half covering his mouth was black. His quirk is he can make duplicates of himself.

Dabi was a reasonably tall, pale young man of slim shape but somewhat muscular build, described to be in his early twenties. He had spiky white hair that didn't pass his neck, and bangs that hung low over his eyes, which were thin, turquoise, and heavily lidded. Dabi's hair was dyed black before revealing his true identity. He can make blue fire (which is significantly hotter than red fire)

Atsuhiro is a tall, slim man with pale skin and brown eyes that are semicircular and slightly slanted inwards, and he has a notably pointed nose. He wears a combination of a mask, balaclava, and a hat. Underneath his mask reveals that he has short black eyebrows and a head of curly brown hair, similar in shade to his eyes. In his villain attire, he wears a dark orange shirt with the collar left upturned, a green striped bolo necktie with an oval-shaped azure brooch hanging around his neck, a black waistcoat, and black dress pants. He wears knee-high white boots with wedged heels and black toe-caps, plain dark red gloves, a tall brown top hat, a red ribbon tied around it, and a pale feather sticking out on the left. He can make anything or anyone as small as a marble.

Shuichi is a young man with a reptile-like appearance, with bright green scales for skin and a face shaped like that of a lizard. His eyes are pink (red in the anime), and his hair is relatively long and swept backward, being a desaturated pinkish-purple in color, standing out from the rest of his colors. He has reptile powers.