Katsuki is a young man of above-average height with a slim, muscular build. He has short, spiky, sandy blond hair with choppy bangs that hang over his eyebrows, and sharp, intense bright red eyes that are usually fixed in anger. His Hero Costume consists of a tight, black, sleeveless tank top featuring an orange "X" across the middle, creating a V-neck design, with two black dots along the left side of the collar, which is the trademark of his costume's designer, Sasori Nimaru. The outfit includes a neck brace with rectangular ends, each having three holes on the side and front. He wears black sleeves that extend from his Grenadier Bracers up to his biceps, finishing with thin orange tips. He has dark green gloves with orange palms, and under his Grenadier Bracers are metal-plated forearm bracers. A dark green and orange belt, equipped with two grenades on each side, secures his baggy pants that have dark green drop‑leg holster pouches secured by thigh straps, and metallic knee guards with four orange bolts fastened into them and two on the side. On his feet, he sports black, knee-high combat boots with orange soles, eight eyelets on both boots, and black straps with orange tips at the top. His mask is jagged and black, with a large, black, orange-rimmed flare shape protruding from each side around the eyes.

Hanta is a tall, lean young man with chin-length black hair spiked downwards, with jagged bangs coming about halfway down his forehead. He has almond-shaped eyes, usually stretched quite broad and rather large, with small pupils and straight teeth that dominate his grin; however, according to Katsuki Bakugo and Present Mic, he has a rather plain face. His elbows have the shape of cylindrical tape dispensers, from which he fires his Tape Quirk.

Denki is a light-skinned boy with messy golden-blond hair parted to the right with a black lightning-shaped streak on the left of his side fringe, which is angled to partially obscure his left eye. He has slanted, somewhat triangular golden eyes with small eyebrows, and is slimmer than most male students in his class, with little visible muscle mass.

Mina is a girl of medium height, set a little more broadly than some of her other female classmates, with, according to her profile, "healthy thighs". Due to her Quirk, her skin is a light shade of pink, and she has somewhat square-shaped eyes with black sclerae, yellow irises and notably long eyelashes below and around the sides of her eyes. Minoru Mineta once commented that "she's got a super athletic body". Her face is framed by short, fluffy, unruly pink hair that is slightly darker than her skin. She also has two thin pale yellow horns protruding from her head, hooked squarely and leaning diagonally to opposite sides, which seem to be slightly flexible, able to bend a bit to each side.

Eijiro is a muscular young man of average height and a rather impressive physique for his young age. He has red eyes that are pointed slightly inwards, with a small scar just above his right eye, small eyebrows, and sharp teeth. His hair is somewhat long, dyed a bright red, and spiked away from his head at all angles with gel, with two more pronounced tufts spiked on either side of his forehead like little horns. This lofty style takes a full three minutes to set.

Kyoka is a young, petite girl with a slender build. She has black, triangular eyes, with notably long lower eyelashes and small eyebrows. Her dark-purple hair is chin length, with an asymmetrical fringe that has two reflections shaped like sound waves on either side. She also has two chin length strands framing her face, and keeps the rest up to her neck. Her most prominent features are the flexible, plug-like earphone jacks hanging from each of her earlobes; they act like extra limbs that she is able to control at will, and change their length if so desired.

Shota is a slender and tall, pale-skinned man with messy, shoulder-length black hair that partially hangs in front of his face and half-opened black eyes. He is usually recognized for his worn-out appearance, often looking fatigued. His facial hair is almost always in a stubbly, unkempt state (shaved for the press), and his eyes tired, bloodshot, and flat unless he's in combat. Shota is a very stern and reserved man who has lofty expectations of his students. Despite his apathetic traits, Shota genuinely cares about his students and will go to great lengths to protect them. As Eraser Head, he saved Tsuyu Asui from being decayed by Tomura Shigaraki, in spite of his grievous injuries. He has also expressed belief in his students on multiple occasions and is confident that even the likes of Katsuki Bakugo would not be swayed by Villains. Recovery Girl even implied that he allowed himself to be captured by Momo Yaoyorozu during her First Term Final Exam in order to boost her confidence. Shota is also quite nurturing, as he has been seen attending to his duties as Eri's temporary guardian without complaint; he has demonstrated to be very attentive and involved in his role as a provider even outside of his duties as a teacher and mentor.