Cipher Pol

CP0, more properly known as Cipher Pol Aigis Zero is the strongest intelligence organization among Cipher Pol. They first appeared on Dressrosa near the bridge to Green Bit. Due to their actions and role, they are major antagonists during the Levely Arc, the secondary antagonist group of the Wano Country Arc, and one of the central antagonist groups of the Four Emperors Saga. CP0 is the strongest of all Cipher Pol units, even surpassing the assassination specialists of CP9. The agents who wear masks are especially elite fighters compared to the rest of CP0. It is said that nothing good can come from this group's presence as stated by Robin. They work directly under the command of the World Nobles.

With Doflamingo's defeat and arrest, the World Government was having a hard time acquiring more weapons that originated from Wano Country through their primary intermediate. As a result, CP0 agents went directly to Wano to negotiate with Shogun Kurozumi Orochi. Orochi accepted their payment in the form of warships, but informed them that if another trade were to happen, Vegapunk would be required as payment. The agents found the request to be an impossibility and in response, Orochi shot one of the members (who was not injured by any more than a simple recoil) and mocked them that he had Kaidou backing him, and therefore was not afraid of the World Nobles nor the Marines. The CP0 agents were later invited to Onigashima on Orochi's behalf for the Fire Festival. During the raid led by the Ninja-Pirate-Mink-Samurai Alliance, the agents lamented on Orochi's death and analyzed the state of the conflict. With the assistance of a human Mary, they used a Go board to illustrate the forces of the two sides. Later, the leader thought back to when Kaidou had been captured by the Marines and how Dr. Vegapunk experimented on his Lineage Factor, thus creating an artificial Devil Fruit. The World Government wanted him to give the fruit to them, but Vegapunk considered it a failure and refused, leaving it on Punk Hazard. One of the other agents asked why he was bringing this up now since Punk Hazard was destroyed, but the leader said that he hoped the fruit was destroyed as well despite the G-5 reporting that one facility was still operational. Later the CP0 spokesman questions why they refuse to surrender based on the defeat of Monkey D. Luffy, then he is informed of the current situation, where he is informed that 3,000 of his soldiers are incapacitated, indicating that the difference in forces is 24,000 against 3,000 and that the Pleasures and Waiters rebelled against Queen changing sides approximately 4,000 soldiers and that the battle had turned into a 20,000 against 7,000. When the Mary expressed her confusion after Tama activated her Kibi Kibi no Mi ability, the CP0 agent was puzzled by her reaction, until he learned about the betrayal. The agents rearranged the Go board as the numbers on the alliance's side had risen to 9,000 while the Beasts Pirates fell to 16,000. They then started talking about ensuring Who's-Who's death, as he was a former Government agent who was imprisoned for a failure before escaping. Though one of them considered leaving him alone as he was not a big security threat due to having outdated information, the others denied this as they believed his betrayal going unpunished would set a bad precedent. However, they did not think his chances of living were high as the Tobiroppo was facing the former Warlord, Jinbe. The CP0 agent then received a call via Den Den Mushi from Rob Lucci, who told him that the World Government is planning on annexing Wano Country under their direct control if Kaidou loses. Lucci also told him that they plan on capturing Nico Robin.They were later seen roaming the castle in search of Nico Robin.