Sour Face

Sour Face appears only in the Murata-drawn version of One-Punch Man.

He is introduced as a former (self-proclaimed) second disciple of Bang who later becomes the instructor of his own style, "Nigamushi-Style Fist."

He is around 20 years old, despite looking older due to his intimidating features.

This mismatch between his age and appearance is a recurring comedic point in his portrayal.

Sour Face once trained at Bang’s dojo and considered himself Bang’s second disciple.

However, when Garou revealed his true violent nature and defeated Sour Face, Sour Face and the other students left the dojo.

After leaving Bang’s dojo, Sour Face started his own school of martial arts.

He became the head instructor of Nigamushi-Style Fist, trying to build a reputation under his own name.

He later appears during a martial arts tournament, where his past with Bang and Charanko comes back into focus.

During this event, his interactions highlight both his lingering pettiness and his capacity for concern toward others.

Sour Face initially comes off as mean-spirited and bullying.

At Bang’s dojo, he would put Charanko in chokeholds until he passed out, treating his junior roughly.

Despite this behavior, he is fundamentally timid and insecure.

He is very self-conscious about being called an old man because of his scary face, especially since he is actually only about 20.

He tends to make excuses before fights, revealing his lack of confidence.

However, he also shows a more decent side, such as worrying about Charanko (actually Saitama in disguise) and looking after him during the tournament.

After his first match victory, he respectfully exchanges praise with his opponent, Jakumen.

Moments like this suggest that beneath his bluster, Sour Face has a basic sense of sportsmanship and humanity.

Sour Face has a very stern, tough-looking face that makes him seem much older than he is.

This harsh appearance contrasts with his often cowardly or anxious behavior and is a source of comedic misunderstanding.

He has short legs, which makes him bad at kicking techniques.

Because of this, he prefers techniques that rely more on upper-body strength and grappling rather than elaborate footwork.

He is also nearsighted and normally wears glasses.

Without his glasses, he cannot clearly distinguish faces.

This poor eyesight leads to a major gag: he fails to notice that the “Charanko” at the tournament is actually Saitama in disguise.

Because their builds are somewhat similar and he cannot see well without his glasses, he accepts the fake Charanko as genuine.

Sour Face is the instructor of Nigamushi-Style Fist, his own martial arts school.

Although not on the level of top heroes or elite martial artists, he is clearly skilled enough to participate in professional tournaments.

He specializes in choking and grappling techniques.

During the martial arts tournament, he defeats his first opponent, Jakumen, using a chokehold.

His short legs make him weak at kicks, limiting his use of full-body martial arts styles.

Instead, he relies on close-range techniques, holds, and submissions where footwork and reach matter less.

Even when he wins, he is not portrayed as overwhelmingly powerful.

He is a competent fighter by human standards but far below monsters, S-class heroes, or someone like Garou or Saitama.

In the martial arts tournament arc, Sour Face provides both comic relief and a grounded human perspective.

He steps into the spotlight primarily because of his shared history with Bang and Charanko.

In his first match, he fights Jakumen and wins via chokehold.

After the match, both fighters acknowledge each other’s efforts, showing that Sour Face is not entirely cruel.

In his second match, he faces Saitama, who is disguised as Charanko.

Sour Face sincerely challenges him to a serious fight, not realizing who he is really facing.

The fight ends in a knockout loss for Sour Face, with Saitama easily overpowering him.

Sour Face’s defeat underscores the enormous gap between ordinary martial artists and Saitama.

Later, when monsters attack the tournament grounds, Sour Face is caught up in the chaos.

He is severely beaten by a monster that appears after his loss and is sent to the hospital.

This sequence emphasizes how vulnerable ordinary martial artists are when true monsters appear.

It also reinforces the series’ theme that, in a world of superhumans and monsters, even strong fighters like Sour Face are still relatively powerless.

Bang

Bang is Sour Face’s former master and head of the dojo where Sour Face once trained.

Sour Face considered himself Bang’s second disciple and took pride in that status.

However, after being defeated by Garou, Sour Face left Bang’s dojo along with the other students.

This departure shows both his fear of Garou and his lack of resolve compared to Bang.

Despite leaving, Sour Face’s martial arts foundation clearly comes from Bang’s teachings.

His own Nigamushi-Style Fist is effectively an offshoot built on what he learned at the dojo.

Charanko

Charanko is Sour Face’s junior from Bang’s dojo.

Sour Face used to bully Charanko with repeated chokeholds, knocking him out during practice.

Although he acted mean toward Charanko, Sour Face later shows a more caring side.

At the tournament, he worries about “Charanko” (who is actually Saitama in disguise) and keeps an eye on him.

He tries to act like an experienced senior in front of Charanko, mixing arrogance with genuine concern.

This relationship highlights Sour Face’s contradictions: he is both a bully and a somewhat responsible senior.

Saitama

Saitama enters the tournament using Charanko’s identity and appearance.

Because of his nearsightedness and Charanko-like build, Sour Face fails to realize that this is not the real Charanko.

Sour Face challenges Saitama to a serious match in the second round.

He believes he is facing his junior, unaware that he is actually fighting the strongest hero in the world.

Saitama defeats Sour Face with overwhelming ease, knocking him out.

This one-sided loss is both comedic and illustrative of Saitama’s absurd power level.

Sour Face’s tough, older-looking face is a constant source of humor.

He is frequently mistaken for being much older, and being called an old man bothers him deeply.

His timid nature clashes with his intimidating appearance, creating a gap that the story plays for laughs.

He talks big before fights but quickly reverts to excuses and worries.

His bad eyesight and reliance on glasses lead to important comedic misunderstandings.

Most notably, he cannot tell that Saitama is not Charanko once his glasses are off.

His combination of petty bullying, insecurity, and flashes of decency make him a layered minor character.

He is not purely villainous or purely noble—just a somewhat flawed, very human martial artist trying to prove himself.