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Bone (骨, Hone) is the B-Class Rank 77 professional hero for the Hero Association.[1]


Bone is a muscular hero dressed in a skin-tight, full-body skeleton costume.


A typical hero of the Hero Association, Bone is a proud, glory-craving hero who fights Mysterious Beings to gain fame. He wants his achievements to be told to the coming generations.


Human Monster Saga[]

Super Fight Arc[]

Bone, along with Butterfly DX and Death Gatling, attempts to stop Hundred-Eyes Octopus in I-City.[2] He narrowly manages to rescue Red Muffler from the monster. After strengthening his bones by drinking milk, he attempts to fight the monster but is instantly defeated, and all his bones are crushed.[3]

He was later saved by Chain'n'toad when Tatsumaki drops the monster's corpse on him and other A-Class heroes.[4]

Warning.png Expand to see original webcomic information. Beware of spoiler content.

Neo Heroes Saga[]

Ninjas Arc[]

Bone, along with Heavy Kong and Peach Terry, is fighting the Internet Surfers. They are easily defeated, but they are saved by Sonic distracting the Mysterious Beings.

Appearances in Other Media[]


Pork Cutlet Bowl[]

Bone was among the many heroes summoned by McCoy to combat the monster that was devastating the Z-City police station. He arrives at the scene late, after Saitama has already killed the monster.[5]

Abilities and Powers[]

As a B-Class hero, it can be assumed that Bone is a fairly skilled combatant, though he is one of the lower-ranked heroes in B-Class implying he isn't very strong by the class' standards.

Physical Abilities[]

Bone drinking milk to strengthen up his bones.

High Bone Density: Bone was born with a highly dense bone structure, which makes his body as tough as armor. Furthermore, for a short period of time, he can further increase his bone density by drinking milk or consuming food with high amounts of calcium.[6] However, all of these are still not enough to withstand a strike from a Demon-level monster, which shattered every single bone in his body.[7]

Enhanced Speed and Reflexes: Bone was able to save Red Muffler from a bus thrown by the Hundred-Eyes Octopus.[8]

Enhanced Endurance: Bone was able to survive an attack from the Hundred-Eyes Octopus, a blow that broke every bone in his body.

Major Battles[]

Participants Chapter(s) Episode(s) Result
Bone, Butterfly DX and Death Gatling vs. Hundred-Eyes Octopus 61, 68 17 Loss


  • Bone happens to be mostly based on Skullomania from Arika's fighting game series, such as Capcom's Street Fighter EX series and Arika's own Fighting EX Layer.
  • In the anime, Bone only appears on a screen in the Hero Association. Once the setting changes to the actual scene of the battle with Hundred-Eyes Octopus, only Butterfly DX and Death Gatling are present until Flashy Flash arrives.
  • In the 2017 One Punch Man Halloween cover, Bone is depicted being zapped by the two raijin cosplayers Max and Genji. This scene is a reference to cartoon-related x-ray sparks that show the skeleton of characters who are being shocked.
Warning.png Expand to see original webcomic information. Beware of spoiler content.
  • A hero with a similar name and appearance to Bone appeared in the Webcomic, called Iron Bone (鉄骨) and ranked B-Class: Rank 57. It's unconfirmed if it is Bone, but it could possibly mean that he was promoted to this rank after fighting Hundred-Eyes Octopus and given a new name.


  1. 1.0 1.1 One-Punch Man Encyclopedia; One-Punch Man: Hero Encyclopedia, page 94
  2. One-Punch Man Manga; Chapter 61, page 23-25
  3. One-Punch Man Manga; Chapter 68, page 4-8
  4. One-Punch Man Manga; Chapter 68, page 25-34
  5. One-Punch Man Omake; Pork Cutlet Bowl
  6. One-Punch Man Manga; Chapter 68, page 7
  7. One-Punch Man Manga; Chapter 68, page 8
  8. One-Punch Man Manga; Chapter 68, page 4


Hero Association
S-Class 1. Blast • 2. Tornado of Terror/Tatsumaki • 3. Silver Fang/Bang • 4. Atomic Samurai/Kamikaze • 5. Child Emperor • 6. Metal Knight/Bofoi • 7. King • 8. Zombieman • 9. Drive Knight • 10. Pig God • 11. Superalloy Darkshine • 12. Watchdog Man • 13. Flashy Flash • 14. Demon Cyborg/Genos • 15. Metal Bat/Bad • 16. Tanktop Master (Tank Topper Army) • 17. Puri-Puri Prisoner
B-Class 1. Blizzard of Hell/Fubuki (The Blizzard Group) • 2. Eyelashes • 3. Mountain Ape • 6. Wild Horn • 7. Caped Baldy/Saitama • 20. Glasses • 25. Pink Hornet • 29. Double Hole • 39. Smell Master • 39. Reclusamurai • 43. Gun Gun • 49. Butcher • 50. Jet Nice Guy • 60. Needle Star • 65. Piko • 69. Crying Man • 70. Trap Tengu • 71. Captain Mizuki/Mizuki • 74. Lily of the Three Section Staff/Lily • 77. Bone • 81. Tanktop Black Hole • 93. Mushroom • 99. ShooterDarkness BladePineapple
Undetermined Class Tanktop GirlTanktop RockabillyTanktop RacerTanktop Al DenteTanktop SwimmerTanktop JungleTanktop MaskTanktop HatterTanktop DoctorPandaman
Staff Members AgoniBearded WorkerBespectacled WorkerC Branch OperatorConsole OperatorExecutive GirlGuichesMain Branch OperatorMcCoyNarinkiSekingarShelter Nr. 7 GirlSitchSome Important GuySpecial Committee GirlZ Branch Committee GirlZ Branch OperatorZeimeet