He has become so powerful that he is indifferent and bored with everything, yet he possesses a clear heroic conviction and a human side that is obsessed with supermarket sales. He usually idles at home reading manga, and in battle, he lets the enemy land all their hits before ending it with a single punch. He is completely bald with a blank, egg-shaped head, though his features become sharp when he gets serious. He wears a yellow suit, red gloves, and a white cape.

Driven by a desire for revenge, he is serious and cold in all matters, yet he is absolutely obedient to his master, Saitama, showing an eccentric and stiff side by doing things like taking notes on everything he says. He handles Saitama's housework and often rushes headlong into battle with overwhelming firepower, frequently returning with his body heavily damaged. He has blonde hair and black sclera with yellow irises, possessing the sharp and sophisticated handsome looks typical of a full-body cyborg. Ranked S-Class Rank 14 in the Hero Association.

In reality, he is a cowardly and timid gaming enthusiast, but due to extreme tension, he is misunderstood by those around him as a cold and intimidating figure with overwhelming charisma. When facing a strong enemy, his heart beats violently out of fear, which others mistake for the 'King Engine'—a sound of him seizing the momentum of battle—causing monsters to get scared and flee or surrender on their own. He has three large scars over his left eye and always carries a stern, grimacing face and a large build, exuding an overwhelming presence just by being there. Ranked S-Class Rank 7 in the Hero Association.

On the surface, she exudes the charisma of a cold and haughty queen, but inside, she is affectionate and prone to blunders, harboring a strong inferiority complex toward her sister and an obsession with being number one. She leads her own faction, the 'Blizzard Group,' scouting or harassing promising newcomers, and will throw herself into danger to save her subordinates in a crisis. She has black bobbed hair and emerald eyes, with a mature and glamorous appearance, usually wearing a dark green dress, a fur coat, and a pearl necklace. Ranked B-Class Rank 1 in the Hero Association.

As a master of martial arts, he is serious, gentle, and rational, but he shows a strict and resolute side in the face of his disciple Garou's evil deeds or the corruption of the Hero Association. He spends time meditating or drinking tea at his dojo, and in battle, he uses the 'Water Stream Rock Smashing Fist' to fluidly deflect enemy attacks and deliver lethal counterstrikes. Though an old man with thick white hair and a mustache, he hides an incredibly muscular physique built through years of training and numerous battle scars under his clothes. Ranked S-Class Rank 3 in the Hero Association.

He is angered by a hypocritical society that does not side with the weak and chooses to become 'Absolute Evil' himself, yet he possesses a contradictory nature with an inherent goodness, such as trying to protect children. He hunts down strong heroes and attacks them, copying the enemy's martial arts in real-time during battle, and evolves by breaking through his limits even when near death. He is characterized by silver hair styled like wolf ears and sharp eyes. He wears tight black martial arts attire, and as he evolves, his body transforms to look more like a monster.

Extremely prideful and arrogant, she spits out venomous words at every turn, but deep down, she dearly cherishes and is overprotective of her younger sister, Fubuki. She looks down on those weaker than herself and prefers to fight alone, using psychokinesis to shake the terrain or hurl massive structures to crush enemies instantly. She has green curly bobbed hair, a youthful appearance, and a petite build, wearing a black long dress with high slits. Ranked S-Class Rank 2 in the Hero Association.

A cold-blooded assassin with immense pride and a competitive streak, but he often loses his cool in front of Saitama, revealing a clumsy and comedic side. He moves at lightning speed, brutally slashing enemies with ninja tools like shuriken and swords, and constantly launches ambushes to defeat Saitama. He is a beautiful, androgynous man with purple eye makeup, wearing a form-fitting black ninja suit and a long, flowing purple muffler.

He appears rough, hot-headed, and like a delinquent on the outside, but he is a kind older brother who can't say no to his sister and a man of integrity who cannot stand injustice. He charges in recklessly, swinging only his single metal bat, and as he takes damage and gets injured, his fighting spirit awakens, causing his physical abilities to explode. He has a pompadour hairstyle and sharp eyes, usually seen with a gakuran-style school jacket draped over his shoulders. Ranked S-Class Rank 16 in the Hero Association.

He has a cheerful personality, obsessing over and easily falling in love with handsome heroes who fit his taste, but he also possesses a strong sense of justice and truly worries about and tries to protect his comrades. In battle, he tears off his clothes (especially his prison uniform) to become naked, engaging in physical brawls using his superhuman strength and durability in his 'Angel Style.' He is a grim-faced giant with an afro, a thick beard, and heavy lips. He usually wears a heart-patterned prison uniform or a sweater he knitted himself. Ranked S-Class Rank 17 (the lowest rank) in the Hero Association.