Hellfire is a robotic monster from the webcomic version of the story, a Monster Association member who fought beside his brother Gale. Both prized their tremendous speed, yet Flashy Flash cut them down before either could react. He was later reworked into the manga character Hellfire Flame.
He took the form of a compact mechanical being clad in armor of black and white, its head shaped like a rounded cylinder. The overall build was small and squat rather than imposing.
Much like his sibling Gale, he carried a strong sense of pride in how fast he could move, treating his speed as the core of his identity.
As a creature of the Monster Association, he counted as a reasonably formidable opponent, with velocity as his defining trait. During the heroes' assault on the association's headquarters, he and Gale ran into Flashy Flash and welcomed the chance to face a strong foe. The pair darted behind the hero in an instant, boasting that no one could match their quickness. Flash proved otherwise, driving his blade through both their heads so fast that neither grasped what had happened. The brothers also shared a spinning combination attack called High Speed Spin, though their swift deaths meant it was never actually shown.

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Hellfire is a robotic Monster Association member from the One Punch Man webcomic, fighting alongside his older brother and partner Gale. He is a Mysterious Being classified as at least Demon level and prized his immense speed.
Hellfire was killed by the S-Class hero Flashy Flash. During the heroes' raid on the Monster Association headquarters, Flash drove his blade through both Hellfire's and Gale's heads so quickly that neither monster realized what had happened.
Hellfire is Gale's younger brother and battle partner in the Monster Association. The two shared a signature combination attack called High Speed Spin, though it was never actually shown onscreen because they were killed before they could use it.
Hellfire takes the form of a small, squat mechanical being encased in black and white armor, with a head shaped like a rounded cylinder.
Hellfire originally appeared only in the One Punch Man webcomic. In the manga he was reworked into a different character called Hellfire Flame.
Looking for more on Hellfire? The Dragon Ball Wiki on Fandom has a dedicated page with community notes.
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