Bomb

Bomb (ボンブ, Bonbu) is a martial arts master, the older brother of Bang, and the creator and teacher of Whirlwind Iron Cutting Fist. He and Bang are the two greatest masters of the Martial Arts world. He is one of the few people aware of Saitama's strength and is part of the Saitama Group.

Appearance
Bomb, like his brother, Bang, is an aged but muscular individual. Appearance-wise, he is almost the opposite of his younger brother. While Bang still has his hair and sports a short mustache, Bomb has a long beard and white, long hair with the top of his head being bald. He wears a classic-style green on blue martial arts robes, while Bang has a plain black shirt with white pants. He is slightly taller than Bang and he has a very strong posture, unlike Bang who often slouches when he's walking.

Personality
Bomb is a caring older brother to Bang. He also seems to be a bit angry for having to dismiss all of his disciples but is quite understanding as he believes there's a reason for letting his disciples go. He worries over Bang's hero activities as he is constantly in danger and suggests he retire.

He is also aware of the fact he is no longer young anymore and his prime has passed to which he laments. That said, he holds hope for the future in the younger generation as he was willing to not let Genos endanger himself in a reckless battle. While not a professional hero, he demonstrates heroic qualities such as saving the injured heroes and an unwillingness to let a disaster level dragon monster enter into a city creating further casualties.

Bang
Bomb is the older brother of Bang and they share a mutual respect for each other. Bomb cares about and worries over his brother for constantly putting himself in danger by fighting monsters. Bomb prefers Bang to retire from the hero business.

Abilities and Powers
As Bang's older brother and the master of the Whirlwind Iron Cutting Fist, it is safe to say that Bomb's strength is on par with the S-Class heroes, even possibly surpassing some, if not most, of them. It has also been stated by Murata that Bomb is even stronger than Bang. In the past, even while holding back, Bomb was able to defeat Bang when his younger brother was using a fighting style called Explosion Release Fist. Bomb claims that if he was 60 years younger, he could handle massive injuries like Garou. In the present, Bomb has passed his prime and states that he does not have the stamina to carry multiple bodies for too long after using a grand technique like Whirlwind Water Stream Roaring Aura Sky Ripping Fist. During his fight against Garou in the latter's evolved state, despite Fubuki having drained his energy to heal Tanktop Master, Bomb proved capable of holding his own against the Hero Hunter for a short period of time before finally being taken down.

Physical Abilities
Immense Strength: As a master martial artist in the same regards as his younger brother, Bang, Bomb possesses incredible superhuman strength, being able to shred Mysterious Beings into pieces with his hands alone. Combining his strength with Bang, Bomb was able to destroy Elder Centipede's initial carapace; which was able to withstand Metal Knight’s missiles and Metal Bat’s swing without a scratch, and send the enormous monster back. He was also able to carry multiple bodies even after using the technique which took a toll on his body.

Immense Durability: According to Bomb himself, he has a lot of durability, which enables him to endure massive damage and still standing. However, he states that he does not have the durability he used to 60 years ago. Despite being knocked back by Elder Centipede, he and Bang took minimal damage. Immense Speed and Reflexes: Bomb possesses incredible speed and reflexes, as in a split second he shredded a monster into pieces with his hands in a circular motion before it could even react. His attacks are so fast that it took the monster's body a moment to fall apart after Bomb completed his attack on it. He was fast enough to quickly protect unconscious A-Class heroes from huge falling debris created by Elder Centipede. Additionally, Bomb was capable of keeping up with Garou in combat while the latter was in his evolved state, with their movements being so fast that Fubuki could not even perceive the fight between them.

Fighting Style
Master Martial Artist: Bomb possesses great mastery over martial arts as he invented his own unique style and techniques from decades of martial arts training. A testament to his skills and strength is that Bang asked for his help in stopping him from accidentally killing his former disciple Garou when he decided to track Garou down. Garou himself acknowledges Bomb’s prowess to being the greatest in the world rivaled only by his brother, Bang.
 * Whirlwind Iron Cutting Fist (旋風鉄斬拳, Senpū Tetsuzan-ken, Viz: Fist of Whirling Wind, Slashing Steel): Bomb's martial art. Whirlwind Iron Cutting Fist revolves around manipulating the air. This martial art style involves a powerful hand movement technique to create a razor-sharp whirlwind pressure that chops the opponent into many tiny pieces. The martial art then pushes the opponent back with various degrees of force depending on the proximity towards the eye of the whirlwind. The cutting pressure is also used in the martial art's kicks or palm strike and is sharp enough to cut through stone. His fists are flexed differently for more direct attacks, with the first knuckles being extended, similar to leopard fist, implying that the Whirlwind Iron Cutting Fist parallels real-life Leopard Kung Fu. Moreover, the hands are sometimes flexed like the Southern Dragon Kung Fu Fist to produce whirlwinds up close. Mastery over Whirlwind Iron Cutting Fist allows Bomb to beat even demon-level monsters in one swift attack before they can even react.


 * Whirlwind Water Stream: Roaring Aura Sky Ripping Fist (旋風流水 轟気空裂拳, Senpū Ryūsui: Gōki Kūretsu-ken, Viz: Whirling Wind Flowing Water: Fist of Roaring Qi, Rending Air): A advanced technique than combining both Whirlwind Iron Cutting Fist and Water Stream Rock Smashing Fist. In order to perform the technique, both Bang and Bomb stand together side-by-side and rotating both one of each of their hands into one fist and unleashing the massive wave of air streams that resembles their respective martial arts (flowing airwave for the Water Stream Rock Smashing Fist and whirlwind airwave for the Whirlwind Iron Cutting Fist) toward an opponent with their fists standing side-by-side. The technique is powerful enough to knock back Elder Centipede during its rush towards them and causes the monster's carapace to become brittle from the shock-wave of the air streams. However, it is stated by both Bang and Bomb, they can only do this technique once per battle since both of them have passed their prime. Traditionally when the technique connects, the shock-waves created will spread through the victim's entire body, which ultimately reduces the victim to dust.


 * Whirlwind Water Stream: Cross Fang Dragon Slayer Fist (旋風流水 交牙竜殺拳, Senpū Ryūsui: Kōga Ryūsatsu-ken, Viz: Whirling Wind Flowing Water: Fist of Biting Fangs, Killing Dragons): A combination of the martial arts of Bang and Bomb, even more powerful than Whirlwind Water Stream: Roaring Aura Sky Ripping Fist. Both perform extremely powerful strikes at their opponent with their respective martial arts during combat.

Trivia

 * Bomb made a cameo appearance in an OVA, standing behind Bang's students.
 * Bomb's fighting style can be considered to be based on the Nanto Sei Ken martial art from the Fist of the North Star series since it involves cutting opponents into pieces with bare hands.
 * In detail, Bomb's style is based on the character Huey, who uses the Gosha Fūretsu Ken (五車風裂拳, Five Chariots Wind Split Fist) to shred an opponent into pieces using wind pressure.
 * Bomb would have beaten Super Mouse in one swift attack before it could even react.
 * Bomb bears a striking physical resemblance to Goutetsu from the Street Fighter series, who was the master of Gouken and Akuma.
 * Additionally, the English translation for Goutetsu, "Roaring Iron" (轟鉄 / ゴウテツ), is similar to the name of Bomb's signature martial art, the Whirlwind Iron Cutting Fist.
 * In the 2017 One Punch Man Halloween cover, Bomb was depicted as a jiangshi along with Blue Fire and Lin Lin, sealed by Bang through an ofuda, a Japanese traditional paper talisman.

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