Devil Long Hair (魔ロン毛, Maronke) is a Demon-level Mysterious Being of the Monster Association.


Devil Long Hair

Devil Long Hair's full appearance

Devil Long Hair resembles a human with very long chestnut hair. His face and ears are decorated with vine-like design and his eyes are pure white. He dons a white attire with thigh-high black boots and black gloves. His jacket has many black embroilment and feather giving him a rather flamboyant appearance.


Devil Long Hair is obsessed with his hair. Speaking in idioms that he modifies to always involve hair, he carries himself with an air of aloof vagueness.

He is particularly calm, and was seen speaking to lesser monsters with no difficulty restraining himself from violence, whereas other high-level monsters often began infighting or cannibalizing each other during idle moments. He is also rather prideful, seemingly surrounding himself with lesser monsters. He tends to use many metaphors to mock his opponents.


Monster Association ArcEdit

At the Monster Association base, he explains to a fellow member how he became a monster by grooming his hair, giving it magical properties.[1]

Later, Devil Long Hair shows up against Atomic Samurai's three disciples, Iaian, Bushidrill and Okamaitachi. Upon seeing Devil Long Hair's attractive looks, Okamaitachi is immediately infatuated by him, but tries to resist it due to such a relationship being forbidden love. Okamaitachi's resolve quickly becomes clear, and he tells Devil Long Hair that he's unable to "reciprocate his feelings". The monster tells him that this news strikes him like "a bolt from the blue". The swordsman then prepares his Air Blade, yet manages to block the long-range attack with his hair.[2] 

Devil Long Hair scoffs, and tells them they'll drown in his hair. The monster stabs his hairs underground and all attack the swordsmen. Devil Long Hair continues these multiple attacks on the three swordsmen, but they manage to hold their own.[3]

Abilities and PowersEdit

Being a Demon level monster Devil Long Hair is a very powerful monster. He easily injured a top A-Class Hero and needed three of them to take him down. Even the heroes themselves barely managed to defeat him. However, it's unclear whether his power comes from only his hair and he himself has no extraordinary physical abilities.

Hair Manipulation: Devil Long Hair can manipulate his hair to lengthen and move as he likes. They are extremely durable, as they were able to catch Okamaitachi's Air Blades[4] and tunnel through solid ground to launch multiple attacks from surprising directions.[5] They're also capable of binding opponents, have great piercing power, and are fast enough to catch top-ranking A-Class heroes by surprise.

Major BattlesEdit

Participants Chapter(s) Episode(s) Result
Devil Long Hair vs. Iaian, Okamaitachi and Bushidrill 104 None Ongoing


  1. One-Punch Man Manga; Chapter 89, page 48
  2. One-Punch Man Manga; Chapter 104, page 3-10
  3. One-Punch Man Manga; Chapter 104, page 11-20
  4. One-Punch Man Manga; Chapter 104, page 10
  5. One-Punch Man Manga; Chapter 104, page 13


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