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Koro is a chemical gas weapon invented by Caesar Clown[2] and used by the Beasts Pirates who acquired it after Doflamingo trafficked it.[3] It is described as a mass slaughter weapon.[4]

EffectsEdit

Koro is a poisonous gas that spreads quickly, infecting and weakening those that breathe it in, though leaving them conscious enough to be interrogated.[5] Its effectiveness surpasses the expectations of its own creator, Caesar Clown.[6]

However, extremely strong and resistant victims of the gas can retain some of their strength, to the point of convincing others that they had not been poisoned at all.[7] Additionally, its effects are treatable during the initial 48 hours after exposure,[8] and with the help of Caesar himself, Tony Tony Chopper managed to develop an antidote for the poison.[9]

NeutralizationEdit

Mink Tribe Given The Koro Antidote

An antidote is given to those poisoned by Koro.

Under pressure from Tony Tony Chopper and Sanji, Caesar created a gas to completely neutralize Koro's effects and named it "Roko". Roko managed to eradicate Koro's residue,[10] but did not cure those who were poisoned by it; instead, the poison had to be expelled from their bodies by injecting a liquid form of the antidote into their bloodstreams.[9]

HistoryEdit

PastEdit

After five days and five nights of battle between the Beasts Pirates and the Mink Tribe, Jack lost his patience and unleashed Koro to poison the minks, who were left incapacitated and at his mercy.[3]

However, Jack left one day after releasing the weapon, after which the Straw Hat Pirates arrived, bringing along the weapon's inventor, Caesar Clown. Revealing he was the inventor of such a weapon, Sanji and Chopper beat him up before forcing him to neutralize the remaining gas and help produce an antidote, saving the minks.[11]

TriviaEdit

  • "Koro" is derived from the word "Korosu", which means "to kill".

ReferencesEdit

  1. One Piece Manga and Anime — Vol. 79 Chapter 795 (p. 4) and Episode 739, The Straw Hats encounter Koro upon arriving at Zou.
  2. One Piece Manga and Anime — Vol. 81 Chapter 808 (p. 17) and Episode 760, Chopper reveals that Caesar's gas weapon defeated the minks.
  3. 3.0 3.1 One Piece Manga and Anime — Vol. 81 Chapter 810 (p. 7-8) and Episode 760, Jack unleashes Koro against the minks.
  4. One Piece Manga and Anime — Vol. 81 Chapter 811 (p. 3) and Episode 761, Caesar describes Koro as being a "mass slaughter weapon".
  5. One Piece Manga and Anime — Vol. 81 Chapter 810 (p. 8-10) and Episode 760, The minks are interrogated while suffering from the effects of Koro poisoning.
  6. One Piece Manga and Anime — Vol. 81 Chapter 811 (p. 3) and Episode 761, Caesar admits that Koro's effectiveness has surpassed his own expectations.
  7. One Piece Manga and Anime — Vol. 81 Chapter 816 (p. 10) and Episode 767, A member of the Beasts Pirates is shocked by Nekomamushi's resistance to the Koro gas.
  8. One Piece Manga and Anime — Vol. 81 Chapter 811 (p. 12) and Episode 761, Chopper reveals that Koro can be treated within the first 48 hours after exposure.
  9. 9.0 9.1 One Piece Manga and Anime — Vol. 81 Chapter 811 (p. 13-14) and Episode 761, Chopper creates and uses a liquid antidote for Koro's poison with Caesar's help.
  10. One Piece Manga and Anime — Vol. 81 Chapter 811 (p. 6-7) and Episode 761, Caesar neutralizes the Koro gas with Roko.
  11. One Piece Manga and Anime — Vol. 81 Chapter 811 (p. 3-7,13-14) and Episode 761, Upon learning of Caesar's creation of the Koro gas, Sanji and Chopper coerce him into neutralizing it and treating its victims.

Site NavigationEdit

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Caesar Clown's Organization
Master: Caesar Clown
Affiliates: Donquixote Doflamingo   •  Kaido  •  Vergo   •  Trafalgar Law   •  Jack  •  Big Mom Pirates  •  Fire Tank Pirates
Subordinates: Former Brownbeard Pirates   •  Centaur Patrol Unit (Smooge  •  Fen Bock  •  Chappe  •  Run)  •  Yeti Cool Brothers  •  Dragon  •  Monet   •  Smiley   •  Brownbeard 
Gigantification Research: Kozuki Momonosuke  •  Mocha  •  Sind  •  Doran  •  Ally  •  Uzu  •  Konbu  •  Biyo  •  Ginko
Vehicles: Flying Gas Balloon
Abilities
Devil Fruit Based: Gasu Gasu no Mi  •  Sara Sara no Mi, Model: Axolotl  •  Yuki Yuki no Mi  •  Ope Ope no Mi 
Related Articles
Story Arc: Punk Hazard Arc
Locations: Punk Hazard  •  Dressrosa
Substances: NHC10  •  KYP  •  H2S  •  Shinokuni  •  SAD  •  Koro
Others: Underworld  •  Centaurs  •  Shichibukai  •  Vegapunk
[v · e · ?]
Beasts Pirates
Captain: Kaido
Disasters: Jack
Gifters: Sheepshead  •  Ginrummy
Subordinates: Scotch  •  Drake Pirates (X Drake)  •  On Air Pirates (Scratchmen Apoo)
Allies and Affiliates: Donquixote Doflamingo  •  Caesar Clown
Ships: Mammoth
Abilities
Devil Fruit Based: Zou Zou no Mi, Model: Mammoth  •  SMILE
Fighting Style Based: Haki
Other: Koro
Related Articles
Story Arcs: Marineford Arc  •  Post-War Arc  •  Punk Hazard Arc  •  Dressrosa Arc  •  Zou Arc  •  Whole Cake Island Arc
Locations: Zou  •  Wano Country
Others: Yonko  •  Underworld (Broker)
[v · e · ?]
Donquixote Pirates
Crew Members: Donquixote Doflamingo  •  Vergo   •  Trebol  •  Diamante  •  Pica  •  Corazon (Donquixote Rosinante)    •  Sugar  •  Violet (Viola)   •  Jora  •  Lao G  •  Senor Pink  •  Machvise  •  Dellinger  •  Gladius  •  Buffalo  •  Baby 5   •  Monet   •  Trafalgar D. Water Law   •  Kyuin  •  Bellamy   •  Caesar Clown 
Affiliates: Bellamy Pirates   •  Disco   •  Kaido  •  Ibusu  •  Jack  •  Gild Tesoro 
Ship(s): SAD Tanker
Abilities
Devil Fruit Based: Ito Ito no Mi  •  Yuki Yuki no Mi  •  Buki Buki no Mi  •  Guru Guru no Mi  •  Bane Bane no Mi  •  Giro Giro no Mi  •  Gasu Gasu no Mi  •  Ato Ato no Mi  •  Hobi Hobi no Mi  •  Sui Sui no Mi  •  Hira Hira no Mi  •  Ishi Ishi no Mi  •  Ton Ton no Mi  •  Beta Beta no Mi  •  Pamu Pamu no Mi  •  Nagi Nagi no Mi 
Fighting Style Based: Haki  •  Rokushiki  •  Jio-Ken
Related Articles
Story Arcs: Jaya Arc  •  Sabaody Archipelago Arc  •  Marineford Arc  •  Punk Hazard Arc  •  Dressrosa Arc
Locations: Spider Miles  •  Rakesh  •  Mock Town  •  Human Auctioning House  •  Punk Hazard  •  Dressrosa (Acacia  •  Corrida Colosseum  •  Sebio  •  Flower Field  •  SMILE Factory)  •  Green Bit  •  Mariejois
Belongings: Mera Mera no Mi  •  Gol Gol no Mi 
Others: Shichibukai  •  Yonko  •  Heart Pirates  •  SAD  •  SMILE  •  Toys  •  Donquixote Family
[v · e · ?]
Underworld
Emperors: Du Feld  •  Stussy *  •  Drug Peclo  •  Morgans  •  Giberson  •  Umit
Brokers: Donquixote Doflamingo   •  Tamago  •  Pekoms
Purchasers: Crocodile   •  Franky   •  World Nobles  •  Kaido  •  Charlotte Linlin  •  Breed 
Mercenaries: Bobby Funk  •  Kelly Funk  •  Suleiman  •  Vinsmoke Family (Germa 66)
Intermediate Providers: Duval   •  Disco   •  Caesar Clown  •  Ibusu  •  Carmel 
Other Associates: Silvers Rayleigh   •  Trafalgar D. Water Law   •  Vergo   •  Donquixote Rosinante    •  Jack  •  Eustass Kid  •  Killer  •  Kuzan  •  Capone Bege  •  Jigra   •  Pandora *
Smuggling
Goods: Dance Powder  •  Treasure Tree Adam  •  Slaves  •  Smiles  •  Weapons  •  H2S  •  Shinokuni  •  Devil Fruits  •  Liquor Iron Ore  •  Koro
Abilities
Devil Fruit Based: Suna Suna no Mi  •  Ito Ito no Mi  •  Kame Kame no Mi  •  Gasu Gasu no Mi  •  Ope Ope no Mi  •  Jake Jake no Mi  •  Nagi Nagi no Mi  •  Zou Zou no Mi, Model: Mammoth  •  Soru Soru no Mi  •  Peto Peto no Mi 
Weapon Based: H2S  •  Shinokuni  •  Cyborg Tactics  •  Koro  •  Scythe  •  Raid Suit
Fighting Style Based: Haki  •  Rokushiki  •  Cloning
Related Articles
Story Arcs: Reverse Mountain Arc  •  Whiskey Peak Arc  •  Little Garden Arc  •  Alabasta Arc  •  Water 7 Arc  •  Sabaody Archipelago Arc  •  Fishman Island Arc  •  Punk Hazard Arc  •  Dressrosa Arc  •  Zou Arc  •  Whole Cake Island Arc
Locations: Alabasta  •  Sabaody Archipelago (Human Auctioning House)  •  Punk Hazard  •  Dressrosa (SMILE Factory)  •  Germa Kingdom  •  Sheep's House
Associated Groups/Crews: Baroque Works  •  Franky Family  •  Flying Fish Riders  •  World Government  •  Big Mom Pirates  •  Donquixote Pirates  •  Beasts Pirates  •  Five Families of the West