Author Ahsya Ahmad - -

Saitama (サイタマ, Saitama) is the main protagonist of One-Punch Man and the most powerful hero alive. Saitama faces a self-imposed existential crisis, as he is now too powerful to gain any thrill from his deeds.

He registered with the Hero Association as a C-Class and eventually made a big leap to become a B-Class Superhero and is tasked to defend Z-City against Mysterious Beings. Under the Hero Association, he is given the name Caped Baldy (ハゲマント, Hagemanto).


Saitama is a bald, ordinary looking man with a thin, but well-built physique and of average height and weight. He claims to have lost all of his hair suddenly and prematurely as a result of the toll taken on his body by his intense hero training. Three years before the story line, Saitama had spiky, black hair and brown eyes that are usually represented by dots.
Saitama is usually deliberately drawn in a simpler style than all the other characters, with an elliptical shaped head and only a simple mouth and eyes. When drawn in a more serious style with more detail, Saitama is revealed to have sharp features, dangerous looking eyes, and a chiseled musculature. Even his posture undergoes a metamorphosis, with a slack posture and sloping elbows when lax, while possessing a straightened posture and squared shoulders when serious. His costume is a plain yellow jumpsuit with a short zipper at the collar, along with a black belt with a golden buckle at the center. The costume is finished out by a red ensemble of boots, gloves, and a white or red cape.


For a superhero, Saitama is thought to be quite indifferent. Even the mightiest foes pose no challenge to him, so he doesn't take his hero work very seriously and defeats monsters like swatting insects. Since his superhero work has begun to bore him, he is constantly searching for an opponent that can provide him with a challenge. The lack of any such opponents has led him to suffer from a self-imposed existential crisis, and he claims that his ability to feel any and all emotions has dulled considerably. He stated that he just became a hero because it was his dream and for self-satisfaction and that before becoming one, he used to suffer from anxiety issues. Despite his boredom, Saitama does not ignore crime.


Little is known about Saitama's past, but it is known that he lives in his apartment by himself. As a child, according to Saitama, he used to watch superhero shows many times, and wishes that he wants to be like those heroes too someday.

Middle School Year

In his second school day of his freshman year in middle school, Saitama is seen reading a health and PE manual, but did not hear from the other students about what happened to the freshman who called himself "The Bicycle Commuter" yesterday, after two third-year bullies beat him up pretty badly.

After school on a rainy day at 4 o'clock, Saitama is watching a news about the ongoing monster incident in Z-City, news of which happened nine months ago. Saitama drifted off to sleep but forgot to do his homework. As a result, he is called by his homeroom teacher to the teacher's room, despite suggesting that he could do both days' homework that night.
While going to the teacher's room, he is interrupted by the same two third-year bullies from the day before and they threatened him to hand over his wallet, but Saitama told them he doesn't have one and prepares to fight them instead. However, Saitama is still too weak to defend himself from the bullies and his 200 yen was stolen by them. Shortly after, Piggy Bancon attacks the bullies and takes Saitama's stolen money from them. Saitama soon heard that one of the bully's reason in threatening the freshmen to steal their money was to feed his little brother his lunches, and Saitama goes chasing after the pig monster to get his money back, but due to his lack of strength, is unable to retrieve his 200 yen. After the monster is destroyed by the police and special unit forces, Saitama decides to return to school and see his homeroom teacher.

Saitama is then scolded by his homeroom teacher, while trying to tell what happened to himself back before going to the teacher's room, though the teacher thinks Saitama is bluffing. While going home, Saitama becomes very disappointed in himself for being weak and losing many times, and starts to think about himself and his future.

Adult Year, First Hero Act

More than three years prior to the start of the story line, Saitama was an unemployed man on a job hunt. One day, after yet another failed interview, a nihilistic-feeling Saitama was wandering the streets and encountered Crabrante. Saitama's total apathy toward the situation impresses Crabrante, who claims to share a similar outlook, prompting him to spare Saitama and move on. Crabrante tells him that his real prey is a child with a cleft chin anyway.

Walking on, Saitama spots the child Crabrante was talking about. He decides that he doesn't want anything to do with the matter but after Crabrante suddenly arrives, Saitama impulsively saves the child from Crabrante's attack. He urges the child to run away and demands to know why Crabrante wants the boy dead. While Crabrante explains the prank the boy pulled on him, Saitama chuckles and notes aloud how the monster resembles one from an anime Saitama watched in his youth. This enrages Crabrante, who pummels Saitama even after the latter resolves to live out his childhood dream of being a superhero by fighting back. As Crabrante turns from the apparently defeated Saitama to finish the cleft-chinned boy, Saitama lassos one of his eye stalks with the loop of his removed tie and tears it out. The monster is defeated and the child saved. Unknown to him, the child confronted his grandfather for the creation of the Hero Association in Saitama's honor for saving his grandchild from the monster's crime.

Resolving after this encounter to become a mighty superhero, Saitama started a daily training schedule which consisted of 100 push-ups, 100 sit-ups and 100 squats along with running 10 km every single day. He ate three meals a day, but only a banana as breakfast and also didn't use the air conditioner to strengthen his mental resistance. These daily activities were extremely tough and caused his body excruciating pain, muscle aches, and internal bleeding. However, Saitama didn't give up and continued his training day after day.

Personification of a Light Pull Cord Attack

On Saitama's 300th day of training, his body had already felt the effect of working out too much. However, Saitama has shown signs of improvement, such as wrecking a car after saving a boy from an accident. At that time, the Personification Of A Light Pull Cord attacked the streets, looking for an opponent that would satisfy him.

The Personification punches cars and buildings as he keeps searching. To test the fruits of his labor, Saitama challenged the monster but was sent flying after a single punch. Filled with determination to overcome his limits, the monster punches Saitama again and is knocked down. However, Saitama quickly got up, and spat out a tooth that had been bothering him because of a cavity. Saitama then defeated the monster with a single punch before moving on with his workout.


Saitama first appears watching a news report on Vaccine Man attacking Z-City. Seeing the destruction, he remarks that he should be leaving. Saitama appears at the scene just in time to save a young girl from being killed. The monster is angered and asks who Saitama is, and he replies that he is "just an average guy who serves as an average hero". After reluctantly listening to the monster's angry monologue and watching its transformation, Saitama kills it with an effortless punch. After this, he screams out in frustration at another easy victory; a pattern which will be repeated in future battles.

Some time after, Saitama hears about a Demon-level disaster emergency, stemming from the The Brain and Brawn Brothers destruction of D-City. After finding the duo, Saitama leaps onto the monstrous Marugori's shoulder and tells him to put some pants on. Fukegao, Marugori's brother who is on his other shoulder, is shocked by Saitama's sudden appearance and orders his brother to swat him. However, Marugori absentmindedly swats at the wrong shoulder, instantly killing his brother. Enraged, Marugori grabs Saitama and throws him into the ground. Saitama is unaffected, but Marugori continues with a frenzied assault of massive stomps and punches, creating a large crater. Believing he has killed Saitama, Marugori moves away, only for the completely unfazed  Saitama to dash out of the crater and crumple the giant's face with a single punch. Saitama states that having an overwhelming power is boring as hell, as the dying Marugori topples over. Unfortunately, Saitama's blow causes him to fall on top of B-City and the town is destroyed.

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