Bomb

Bomb (ボンブ, Bonbu) is Bang's older brother as well as a dojo master.

Appearance
Bomb, like his brother, Bang, is an aged-but-muscular individual. Appearance-wise, he is almost opposite to 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 martial arts robes, while Bang has a plain black shirt with white pants. He's quite tall considering his age and unlike most elderly figures he has a very strong posture, unlike Bang who is shorter than Bomb is and often slouches when he's walking.

Personality
Bomb is a caring older brother to Bang. He also seems to be bit angry for having lost all of his disciples, but is quite understanding as he believes there's a reason for letting his disciples go.

Hero Hunt Arc
Bomb is first seen in his dojo in a meeting with his brother, Bang. Although he doesn't know Garou himself, he talks about how he heard that he's a threat and must be taken down. Therefore he prepared to close his dojo and say farewell to his students for their own safety. He agrees on hunting him down alongside Bang after a short conversation. He later arrives with Bang to a scene where Garou badly defeats the Tank Topper Army, Mumen Rider and Charanko.

Monster Raid Arc
During Bang's and Bomb's search for Garou, Bomb notices that one of their marked A-Class heroes is being attacked and the two martial artist rush to scene. Smile Man is struggling against Fist Fight Djinn. Bang tells Bomb to stay back as he approaches the monster. Fist Fight Djinn boasts about his power, but before he could finish talking, Bang unleashes his anger through a barrage of attacks, breaking every bone in the monster's body. Afterwards. he tells Bomb to continue to search for Garou before Garou becomes a monster.

Monster Association Arc
After Bang and Bomb arrive at the fight between Garou and Genos, he helps his brother dispose a monster nearby by using his Whirlwind Iron Cutting Fist technique to mince a monster into pieces.

When Bang prepares to fight Garou, Bomb states that he will take care of the rest of the monster.

Abilities and Powers
Not much is known about Bomb's strength. However, as Bang's older brother and master of the Whirlwind Iron Cutting Fist, it is safe to say that Bomb's strength is on par with the S-Class heroes. He was able to effortlessly shred a monster to pieces, further hinting at his superior strength. However, he was knocked out by a Black Sperm clone with only a single hit, albeit this was while he was caught off guard.

Fighting Style
Master Martial Artist: From decades of experience, Bang is one of the most powerful martial artists within the series, perhaps only behind Awakened Garou. Bang possesses a vast knowledge of martial arts and as a result was able to create his own martial art. Despite his old age, Bang is able to defeat Dragon-level monsters with ease. He is considered to be the "Greatest Treasure of Martial Arts" and has shown to use ruthless killing methods of martial arts when he is angry instead of using efficient methods. His mastery of martial arts is greatly noted in a sparring match against a fellow S-Class hero, Superalloy Darkshine, in which Bang was able to defeat Darkshine in a one-sided bout.
 * Whirlwind Iron Cutting Fist (旋風鉄斬拳, Senpū Tetsuzan-ken): Bomb's martial art. This martial art style involves a powerful hand rotation technique to create a razor sharp whirlwind pressure that chops the opponent into 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.
 * Whirlwind Water Stream Blasting Sky Splitting Fist (旋風流水轟氣空裂拳, Senpū ryūsui Todoroki 氣 Sora 裂-Ken): A more advanced technique than both Whirlwind Iron Cutting Fist and Water Stream Rock Smashing Fist, a move that splits the skies and blasts airstreams into the opponent’s body. It is one level weaker than Cross Fang Dragon Slayer Fist.
 * Secret Combination: Cross Fang Dragon Slayer Fist (連携奧義 交牙竜殺拳, Renkei Ōgi: Kōga Ryūsatsu-ken): A combination of the martial arts of Bomb and Bang, even more powerful than Whirlwind Water Stream Blasting Sky Splitting 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 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.
 * According to Murata, Bomb is even stronger than Bang.