Pure Evil Wiki

Just watch... I'll teach you who's the world's number one scientist!
~ Caesar Clown

Caesar Clown is a mad scientist who was allied with the Donquixote Pirates. He is a cruel and sadistic scientist who only cares for himself. He is the main antagonist of the Punk Hazard Arc in One Piece.

He was once a member of MADS (along with Dr. Vegapunk, Vinsmoke Judge and Queen).

He is voiced by Ryūsei Nakao (who also voices Frieza) in the Japanese version, and Jerry Jewell (who also voices Barry the Chopper) in English.

What Makes Him Pure Evil?

  • He sets off a bomb on Punk Hazard, killing hundreds of people on the island. The bomb also laid waste to the entire island, killing the vegetation and turning it into a wasteland. His reasons for bombing the island were because of his envy, anger, and hatred of Dr. Vegapunk.
  • He would help save pirates who landed on Punk Hazard, only to experiment on them, which would end up killing them. He would also manipulate the pirates into working for him.
  • He had his men abduct children and feed them drugs in the form of candy. The drug would make them grow in size to become giants. However, the drugs would cause pain to the children by turning them into homicidal and raving lunatics. Caesar fully knows that the drug would cause their deaths in five years and does not care. He intended to get more children for his experiments.
  • While unleashing the Shinokuni gas, he was willing to let one of his partners, Vergo, die since he was in the wrong place at the wrong time. He also called him an idiot and did not care.
  • He attempted to kill Smoker out of spite for his failed plan by stabbing his heart. However, Law swapped out Smoker's heart for Monet's, causing him to kill her instead and leaving him confused about why Smoker is still alive.
  • He unleashed the Shinokuni gas on the pirates he saved and attempted to kill all of them in his fight against Luffy. He also mocked them by saying they mean nothing to him before attempting to kill them.
  • He refused the save the Minks from the chemical weapon that Jack used against them. He was only interested in watching Jack's victims die in front of him and seeing how the chemicals destroy their bodies. However, he did help create an antidote to save them, but only because he was threatened by the Straw Hats, who threatened to kill him by squeezing his heart.
  • Although he was a business partner of Big Mom, he lied to her about the incident on Punk Hazard to put the blame on Law and Luffy for why his gigantification experiments did not go anywhere. However, he embezzled the funds Big Mom used to pleasure and entertain himself. He betrayed her later by allying with Capone Bege in his plan to assassinate her, and used the opportunity to retrieve his missing heart and save himself.
  • He threatened to kill Capone Bege's baby son, Capone Pez, if Bege could not return his heart to him.
  • He also doesn't care about his fellow scientists such as his former colleague at MADS, Vinsmoke Judge, calling his personality unbearable.


  • Since the Punk Hazard Arc, Caesar has been portrayed as more of a comic relief and no longer a real threat to the protagonists. Despite this portrayal, Caesar still has not expressed anything redeeming to his character and, on many instances, was against helping others and threatened others.
  • According to SBS Volume 89, Eiichiro Oda, the author of One Piece, stated that Caesar Clown is 'better off if he was dead', showing that even Oda himself believes that Caesar Clown is an irredeemable villain.

External Links


           One piece logo by zerocustom1989 d1dghop-pre.png Pure Evils

Captain Kuro | Akainu | Hody Jones | Caesar Clown | Donquixote Doflamingo