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Groribas (グロリバース, Guroribāsu) was an alien and a general of the Dark Matter Thieves. He was killed by Saitama.[2]


Groribas had a very large and muscular body with shades of green across his shoulders and stomach. He lacked eyes on his head. In place of hands, Groribas had mouths with sharp teeth, resembling crab claws. He wore a spiked dog collar around his neck. He also had a very long and green tail with a fourth head on the end.


Groribas displayed great confidence in his battle prowess. He showed a somewhat goofy personality, not being able to decide which moves to use in a fight while heading to Saitama's location. Despite his aloof demeanor, he liked to slowly kill his enemies.[1]


Hero Association Saga[]

Groribas confronts Saitama

Groribas is killed

Alien Conquerors Arc[]

When Geryuganshoop and Groribas learn of Saitama's intrusion into the ship, Groribas goes to deal with him. As he's going to Saitama's location, he wonders what special moves he will use against him.[3]

Groribas briefly appears in a futile attempt to stop Saitama from damaging the ship further. While touting his own abilities and preparing to strike down Saitama, he is beheaded by Saitama's punch.[4]

Abilities and Powers[]

Due to his status as a Dragon-level threat, it can be assumed that he was an extremely powerful being. Although he was effortlessly killed by Saitama, Geryuganshoop stated that Groribas was their "best warrior".[5]

Physical Abilities[]

Immense Strength: As a Dragon-level Mysterious Being, it can be presumed that Groribas had very impressive strength. He was strong enough that he killed most of his opponents before he could display all of his techniques.

Acid Breath (アシッドブレス, Ashiddoburesu): Groribas claimed to have an acid breath that can melt anything, but this is not shown due to the speed at which he is dispatched by Saitama.

Fighting Style[]

Expert Hand-to-Hand Combatant: Groribas possessed 20 techniques,[3] which he was not able to show off due to his quick death by Saitama. Given their names, it can be assumed that he preferred hand-to-hand combat. He stated he would often kill his opponents too quickly before he could display all of his techniques.[3]

  • Double Bite: Groribas attacks with both arms at once. The effect of this move was never seen.
  • Purgatory Thorn Grip: One of Groribas's many moves that he did not get to display.
  • Sky Strangle Sunder: One of Groribas's many moves that he did not get to display.
  • Screw Tail Thrust: One of Groribas's many moves that he did not get to display.

Major Battles[]

Participants Chapter(s) Episode(s) Result
Groribas vs. Saitama 32 10 Groribas is killed


  • Groribas's name is a possible pun of Guro (グロ), a shorten form of "grotesque" in Japanese. and Reverse being often used to refer "vomiting" in Japanese.
  • Murata has stated that if Melzargard, Groribas, and Geryuganshoop work together to fight against Orochi, even with preparation, they have almost no chance of winning.[6]


  1. 1.0 1.1 1.2 One-Punch Man Encyclopedia; One-Punch Man: Hero Encyclopedia, page 158
  2. One-Punch Man Manga and Anime; Chapter 32, and Episode 10
  3. 3.0 3.1 3.2 One-Punch Man Manga; Omake (Volume 6)
  4. One-Punch Man Manga; Chapter 32, page 53
  5. One-Punch Man Anime; Episode 11
  6. One-Punch Man Stream; 2/6/2018

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