Summary
- One Punch Man boasts a diverse cast of characters with varying levels of strength and abilities.
- Ranking allows for comparison between characters; fights highlighted by small power level differences are exciting.
- The series features powerful characters like Saitama, Tatsumaki, Boros, and Blast, each with unique strengths and abilities.
One Punch Man is an action-focused manga series that follows the adventures of Saitama. The plot of the manga seems rather simple at first. But after some time, it becomes clear that there are many more complex layers.
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While Saitama is impressive in his own right, there are other One Punch Man characters who also possess incredible strength. These characters have shown that they are capable of performing amazing feats. Like in any manga, the power levels of the characters have increased with the progress of the story.
Updated on November 2, 2025: There is absolutely no shortage of powerful individuals in One Punch Man. Each of them is armed with dangerous abilities that can change the tide of battle in the blink of an eye. At the beginning of the series, there were only a handful of characters who could pose a threat to the world, but that has changed with time. The author has made a note to add strong individuals who increase the stakes.
With One Punch Man Season 3 airing, there is a lot of discussion within the fan base about who the strongest characters are. Since the anime is covering the Monster Association arc, fans will get to see many individuals who boast of incredible powers.
17 Bang
An Elite Martial Artist
- Affiliation: Heroes
- Martial Artist with a special style
Bang is an elite martial artist who served in the Hero Association. He was ranked as the third-strongest hero within the organization, only behind Blast and Tatsumaki. Bang's style of fighting revolved around the Water Stream Rock Smashing Fist, which he had created after a great deal of effort.
Despite being old, Bang was able to demolish Dragon-level threats almost effortlessly. He could even smash meteor chunks with his bare hands. Additionally, he had immense speed and reflexes, allowing him to blitz his opponents and dodge their attacks.
Biggest Strength: Bang's is a skilled martial artist who has proven that age is just a number. The S-Class hero has demolished numerous threats with his bare fists, and his feats have earned him the respect of his peers. If Bang was younger, he would have held a higher rank.
16 Overgrown Rover
Could Fire Lethal Energy Blasts
- Affiliation: Villains
- Enhanced physical traits
Overgrown Rover was an executive member of the Monster Association. It was the only member who did not behave in an openly hostile manner towards the heroes. Overgrown Rover's feral side only took over whenever it was attacked by another individual. Once angered, it couldn't distinguish between friend and foe.
It could fire energy blasts that were potent enough to incinerate the toughest objects. Overgrown Rover was able to withstand a blow from Saitama, which is a testament to its resilience. Overgrown Rover's other physical abilities were equally impressive. It possessed immense speed, strength, and enhanced senses.
Biggest Strength: Overgrown Rover might not have the same level of intellect as the other monsters, but there is no denying that his physical traits are not only bettered by a handful of characters. With its enhanced speed and power, not many characters can stand their ground against this monster.
15 Flashy Flash
Overwhelmed Opponents With Speed
- Affiliation: Heroes
- Incredible pace that can only be matched by a few
Flashy Flash is an S-Class hero who is renowned for his speed. He can cut down his opponents before they even have the chance to react. Flashy Flash's speed also helps him to avoid enemy attacks. Aside from his pace, Flashy Flash possesses superhuman strength and endurance.
He has beaten Dragon-level threats on his own, which is extremely impressive considering how durable their bodies are. Flashy Flash's endurance is nothing to be scoffed at either. While fighting Gale Wind and Hellfire Flame, he was able to withstand multiple blows from them.
Biggest Strength: Flashy Flash is not just one of the strongest characters in One Punch Man, but he is also among the fastest. Due to his speed, Flashy Flash can end most fights in seconds.
14 Zombieman
Cannot Die From Any Injury
- Affiliation: Heroes
- Has Incredible Regeneration
Zombieman is an elite fighter who is employed by the Hero Association. Presently, he holds the sixth rank in S-class, which means there are only a handful of characters who are superior to him in terms of strength.
As the name implies, Zombieman is famous for his inability to die. He has insanely high regenerative powers, which allow him to keep fighting no matter what kind of wound he suffers.
Biggest Strength: Zombieman's regenerative power means that he cannot die, and that's his biggest strength.
13 Metal Knight
Armed With A Plethora Of Scientific Weapons
- Affiliation: Heroes
- A genius with nearly unlimited resources
Metal Knight is an S-Class Rank 4 hero, which automatically makes him one of the strongest characters in One Punch Man. His real name is Bofoi, and he is an old man. He managed to climb through the ranks with his genius-level intellect. Very few people know about Bofoi, as he uses robots to keep his identity hidden.
Bofoi has created multiple weapons and other pieces of technology, and he has supplied the Hero Association with both. Bofoi, or Metal Knight, is considered to have enough weaponry to take down any hero by himself. However, he has yet to show off his true power to the audience.
Biggest Strength: Bofoi is skilled at deception, so barely anyone knows about his true powers. However, it has been revealed that he has access to many potent weapons.
12 Platinum Sperm
Could Combine To Become Stronger
- Affiliation: Monsters
- One of the fastest beings in the series
Platinum Sperm is the most powerful form of Black Sperm. It is made up of trillions of cells, so it has a higher cell count than Golden Sperm. Platinum Sperm was able to go toe-to-toe with Flashy Flash, a strong S-rank hero.
Platinum Sperm overpowered Flashy Flash rather easily, and he was even able to put up a good fight against Garou. However, Garou's drastic increase in power enabled him to take down Platinum Sperm, leaving Black Sperm in an extremely weakened state.
Biggest Strength: Platinum Sperm's physical strength was nothing to scoff at, but his trump card was his speed. He was able to blitz Flashy Flash, a hero renowned for his speed. At the peak of his powers, Platinum Sperm was able to cover vast distances in mere milliseconds.
11 Atomic Samurai
The Best Swordsman In The World
- Affiliation: Heroes
- Can cut down monsters with ease
Atomic Samurai is currently the third-strongest individual from the Hero Association. He is a master swordsman who is known for his ruthlessness. Like many heroes, Atomic Samurai is condescending and has a massive ego. However, he is very protective of his disciples.
Atomic Samurai primarily relies on his swordsmanship to get the better of his opponents. He can swing his blade so quickly that it's almost impossible for the naked eye to discern what's happening in real-time. Furthermore, Atomic Samurai has lightning-fast reflexes, so he can dodge almost every incoming attack with ease. Last but not least, he is also able to cut through high-level monsters with just a toothpick.
Biggest Strength: There is zero doubt that Atomic Samurai's greatest weapon is his swordplay, with which he has defeated many powerful monsters. At this point in the story, there is simply no character who has superior swordsmanship to Atomic Samurai.
10 Sage Centipede
Durable Exoskeleton Protected It From All Manner Of Attacks
- Affiliation: Monsters
- Had a rigid defense
Sage Centipede was an enormous monster who fought against Blast. It was much bigger than the Elder Centipede, who was a fearsome monster in its own right. Sage Centipede was a Dragon-level monster, and it was unleashed by God upon the people of the world. God wanted Sage Centipede to destroy the person who had turned against them.
Sage Centipede's size made it an incredibly dangerous opponent. It was capable of causing immense damage to its surroundings with minimal effort. It was eventually taken down by Garou.
Biggest Strength: The Sage Centipede had excellent offensive and defensive abilities. Its exoskeleton protected it from incoming attacks, after which it would kill the opponent by simply devouring them or crushing them with its body.
9 Evil Ocean Water
Had Almost No Weak Points
- Affiliation: Monsters
- Almost had no vulnerabilities
Evil Natural Water was a Dragon-level mysterious being, and it was a member of the Monster Association. Evil Natural Water had no mind of its own, and it only sought to cause destruction. It was created due to Psykos' experiments, but it was impossible to tame it, so it was kept contained.
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After being released, it absorbed an ocean and became Evil Ocean Water. It didn't take long for the monster to show off its power by overwhelming several A-rank heroes. Since it didn't have any organs, it was extremely difficult to hurt Evil Ocean Water.
Biggest Strength: The absence of organs effectively made Evil Ocean Water invincible. Only those who had more physical strength could hurt the monster.
8 Psykos-Orochi
Had Enough Power To Destroy The Earth
- Affiliation: Monsters
- Psychic powers were off the charts
Psykos and Orochi combined to give rise to an entity capable of causing problems for several S-rank heroes. The two fused after Orochi was defeated by Saitama. The monster used his ability to absorb others to merge with Psykos. The fusion of the two villains had enough firepower to slice the Earth's surface.
Psykos-Orochi also had the ability to regenerate, allowing it to tank massive amounts of damage without worrying about being heavily injured. Psykos-Orochi also had psychic powers, and they were powerful enough to force Tatsumaki to become serious.
Biggest Strength: Psykos-Orochi had access to a great deal of psychic and physical power. If Tatsumaki had not stopped them, the Earth would have suffered irreparable damage.