Eustass "Captain" Kid is a notorious pirate from South Blue and the captain of the Kid Pirates.
He is one of twelve pirates who are referred to as the "Worst Generation". One of the reasons his bounty was higher than Luffy's when they arrived at the Sabaody Archipelago was the huge numbers of civilian casualties that Kid and his crew caused in the course of their activities.
Sometime during the timeskip, his bounty was raised from 315,000,000 Beli to 470,000,000 Beli. He also lost one of his arms in a confrontation against one of the Four Emperors, Shanks, during this period, and attempted to form an alliance with the On-Air Pirates and Hawkins Pirates to challenge the Red Hair Pirates once more, but it was eventually disbanded due to the actions of another Emperor, Kaido.
Kid and his crew briefly join forces with the Straw Hat Pirates and Heart Pirates during the Sabaody Archipelago Arc. He also becomes an ally member of the Ninja-Pirate-Mink-Samurai Alliance during the Wano Country Arc.
Not much is known about Kid's early life, other than he is originally from the South Blue and has known Killer since childhood.
When Kid and Killer were young, they ate curry udon with their first love, Shiruton Doruyanaika. They laughed when she spilled curry broth all over herself while eating it, causing her to beat them up. This caused curry udon to become their least favorite food.
Kid formed his own crew, the Kid Pirates, in the South Blue and were noted to have been responsible for a great deal of damage and had caused many civilian casualties along their journey.
After a long voyage following one of the Log Pose routes of the Grand Line, Kid and his crew arrived at the Sabaody Archipelago to prepare themselves for the New World. While there, he had a little squabble with Scratchmen Apoo in Grove 24. Before their battle could escalate further, Apoo asked Kid to postpone it until they went to the New World. Knowing what would happen if an incident were to happen, Kid agreed to Apoo's terms.
Kid and his crew then ventured deeper into the mangrove and entered the Human Auctioning House. As Kid waited for the auction to begin, he made a number of remarks to his crew, claiming that the World Nobles make pirates seem humane by comparison and bemoaning the twisted nature of the world order, before noting that he might actually join in on the slave auction. Kid later caught a glimpse of Trafalgar Law, who was already sitting for the auction, and was flipped off by the pirate doctor. As the auction began, Kid noticed some members of the Straw Hat Pirates coming in and was disappointed to find the captain was not with them at the time, noting that he wished to see just how big an idiot and how crazy Monkey D. Luffy is supposed to be, as depicted in the newspapers.
Kid watched through most of the auction, until the World Noble Saint Charlos made an outrageously high 500,000,000 bid for the mermaid, Camie, which completely shut out the other participants in the auction. Seeing the noble went unchallenged, Kid decided to leave the auction house, considering it another example of what is wrong with the world. However before he and his crew left the building, Luffy and Roronoa Zoro crashed through the wall right next to them. What followed next then was a ruckus caused by Luffy that caught Kid's eye. As the events unraveled, Kid, along with the rest of the crowd, watched in shock as Luffy punched Charlos out of anger for shooting his fish-man ally, Hatchan. While most of everyone in the auction house started panicking at this turn of events, Kid, as well as Trafalgar Law, simply smiled approvingly at what happened.
Just as Kid was watching the ensuing chaos, he noticed that someone suddenly came out of the back of the auction house's stage along with a giant. He then witnessed the person knocking out nearly everyone in the place except for the Straw Hats and their allies with Haki. Having taken the blast and survived through it, Kid realized that this person was none other than Gol D. Roger's first mate, Silvers Rayleigh. As the situation continued, Kid and those still conscious realized that a bunch of a Marines were surrounding the auction house for what Luffy did.
Though happy at seeing how crazy Luffy is as the rumors stated, Kid decided not to stick around to fight a Marine Admiral. Seeing as how the Marines were treating Kid's and Law's crews as if they were accomplices to the Straw Hats, Kid told Luffy and Law that he would go on ahead and clear a way for them so that they would not have to worry themselves. However, Luffy and Law were insulted by Kid's remarks, and instead decided to go face the Marines along with him. Together, the three captains began to fight the Marines outside the auction house with their respective Devil Fruit powers. Luffy noted that both Kid and Law have crazy powers, with Kid responding that Luffy had the weirdest.
After beating back the first wave of Marine attacks and scattering them, Kid noted that their plan of attack was utterly demolished. He bid Luffy farewell and stated that it was nice meeting him, but promised that the next time they meet, he would not be so merciful. Luffy unconcernedly replied that he would be the one to find One Piece. Both Kid and Law stared at Luffy and were even distracted from the attacking Marines. Killer defended Kid and scolded him for not paying attention. Kid reflected to Luffy that on his voyage, people had laughed when he made the same claim and he killed everyone who laughed at him. He also stated that from this point, anyone without the nerve to claim One Piece would die on the seas. He invited both Luffy and Law to meet up with him in the New World before departing with his crew.
After defeating the Marines, the Kid Pirates were on their way to leave the island when moments later, Kid and his crew were confronted by what they believed to be Warlord of the Sea Bartholomew Kuma. It surprised both Kid and the pirates when it fired a laser from its mouth which hit Kid's left leg. Law and his crew happened to encounter them while escaping as well and, despite Kid telling Law to stay back, they both prepared to fight against the Pacifista.
Kid and his crew managed to escape capture by the Pacifista and later returned to Sabaody Archipelago. They watched the live broadcast of the execution of Portgas D. Ace up until it was cut off by the Marines. After this, Kid told his men they were departing.
The Kid Pirates then approached Marineford and watched the war unfold from a safe distance on board of their ship. After the war was declared over by Sengoku, Kid commented that since Whitebeard died, the balance of the Three Great Powers was shifted with the New World under the control of the remaining Emperors Shanks, Kaido, and Big Mom. Kid went on saying that the New Age, the likes of which no one has ever seen before, has begun.
Kid and his crew later arrived in the New World. He was reading aloud from the newspaper article about Luffy going to Marineford a second time. He then asked Killer what the Ox Bell is.
After Killer's explanation, Kid thought Luffy's message meant that he was going to create the new age himself. Kid found this amusing and then stated that Luffy really knows how to get on people's nerves, and even though he gave the Straw Hat captain credit for being the only Supernova brave enough to participate in the Marineford War, thereby putting him a step way ahead of the other infamous rookies, he was not generous enough to let Luffy go around and do as he pleases.
He then took Haritsu Kendiyo's pirate crew captive. After the crew begged him to let them go back to Paradise, he crucified them using his Devil Fruit powers, saying that people with that little amount of resolve have no business in the New World.
Sometime during the two-year timeskip, as Kid got very involved in many conflicts, he lost his left forearm in battle against the Red Hair Pirates. He later replaced it with a large metal one.
At some point after this, Kid and his crew went to Big Mom's territory and injured one of Big Mom's Sweet Commanders, as well as plundering something. However, they were quickly forced to flee afterwards.
A few days after sinking two of Big Mom Pirates' ships, he watched Caesar Clown's broadcast of his new weapon of mass destruction via a video Den Den Mushi. When asked by Killer if he was interested, he stated that he was not interested in owning the weapon but merely wanted to know about it.
After seeing his fellow Supernovas Luffy and Law captured, Kid then left the broadcast at the urging of Killer to meet up with some apparent guests. He then told Killer that watching was meaningless, and how he did not think Killer ought to work as a broker anyway. Kid also mentioned that he was surprised about how Law was really planning something all along, having believed he had become a government dog. Asking if the guests had arrived yet, Killer told him that they have and that he was surprised they came at all. Before entering the room, Killer reminded Kid to be friendly, causing the captain to become irritated and told Killer to shut up. Opening the door, it was revealed his guests were Apoo and Basil Hawkins.
Apoo, standing amongst a wrecked room and over one of Kid's badly beaten subordinates, told Kid that it felt nostalgic for him to see his ugly face. Kid instantly became enraged, asking what gave him the right to trash someone's hideout. Apoo replied that when he received an invitation from an enemy, he came expecting a fight and that he had suspected there might be a sniper somewhere. As the two challenged each other, Hawkins declared how foolish the meeting was and that he was leaving. Killer asked him to wait as he stepped between Kid and Apoo, reminding them that the three crews came together to try and form an alliance and asked that they at least try to discuss it.
A newspaper later revealed that the three captains came to an agreement and formed an alliance.
After reading the newspaper, he saw that Luffy and Law had formed their own alliance and wondered which Emperor they were targeting.
Kid, Hawkins, and Apoo were dining together when they heard the news of Donquixote Doflamingo's defeat. They figured that Luffy and Law were after Kaido since Doflamingo was connected to him. They were pleased that Luffy and Law were not after the same Emperor as them, Shanks.
Some time later, Kid and the others were alerted by what seemed to be an earthquake. Kid instructed his men to have their weapons drawn and drew closer to investigate. The source of the commotion was a large crater on the ground in the shape of a human. Kid was enraged and demanded an answer as to what person was behind this occurrence. He was answered by another explosion in the direction of the crater. It was then revealed that the man who had caused the explosion was Kaido. At that time, Kid, Killer, and Hawkins discovered that Apoo was already working for Kaido with the intention of setting them up to join him as his subordinates. While Hawkins joined Kaido, Kid and Killer refused to submit to the Emperor and tried to fight him only to be defeated.
After the confrontation with Kaido, Kid was severely beaten and imprisoned by the Emperor and his crew.
In the Udon region of Wano Country, Kid was sitting in a cell of the Prisoner Mine when Luffy was thrown next to him. Both Kid and Luffy swore payback against Kaido before they noticed each other. A few days later, both of them were competing over who could do more work at the mine. Dobon then confronted the two over the amount of kibi dango rations they acquired. He prepared to discipline them by putting them both into his hippo's mouth. However, Kid and Luffy quickly knocked out Dobon and his hippo.
Later, Kid overheard Caribou telling Luffy a rumor about how Kid's arm got cut off, and he interjected to correct the story. Kid and Luffy then argued over which one of them would take down Kaido. At a later point, Kid somehow escaped from the prisoner mine.
Kid later spotted Killer being escorted to the Prisoner Mines. He attempted to attack the escort only to be subdued and recaptured. After returning to the prison, Kid questioned Killer on what Kaido had done to him and the fate of their crew, but Killer could not answer through his laughter and tears. Queen then subjugated them both to water torture and threatened to keep them submerged until Luffy and Hyogoro die in the Sumo Inferno. When Big Mom was swinging Queen around, Kid and Killer were saved from drowning when Queen crashed into the contraption holding them and knocked them out of the water.
As Luffy and his allies from the Ninja-Pirate-Mink-Samurai Alliance were fighting against the Beasts Pirates, Raizo tossed some keys to Kid and Killer so they could release themselves. Kid sat there and watched as the chaos unfolded. After the prison takeover was complete, Luffy offered Kid an alliance to defeat Kaido. Kid rejected Luffy's offer, feeling betrayed by Apoo and Hawkins. He then took Killer with him and left the Prisoner Mines to find his other crewmates.
On the day of the Fire Festival, the Kid Pirates joined the Straw Hats and Heart Pirates in battling the Beasts Pirates' ships at Tokage Port. According to Kid, he met many ships and samurais on the other port that he found it difficult to set sail. After rescuing Kin'emon's group, Kid and his crew were shocked to hear that Kaido had formed an alliance with the Big Mom Pirates. Undeterred, Kid, Law, and Luffy destroyed a Beasts Pirates' ship together. While dealing with the last enemy ship, he was surprised to see Jinbe's arrival and learned about the fish-man's joining with the Straw Hats.
When the Straw Hats took over the port in front of Onigashima, Kid once again promised to be the one who would defeat Kaido. After disembarking on Onigashima, the Kid Pirates received Beasts Pirates disguises from Kin'emon. As the alliance began their raid, the Kid Pirates went ahead of the Straw Hats, with Luffy and Zoro following after them.
While sneaking through Skull Dome's Live Floor, Kid was surprised when Luffy and Zoro began causing a commotion. At first, he tried to ignore them in order to not bring unwanted attention to himself and his crew, but when he spotted Apoo, Kid decided to start fighting as well. As Apoo was distracted with attacking the two Straw Hats, Kid attacked Apoo for revenge. Apoo quickly recovered and retaliated, forcing Kid back. The situation became more chaotic as Hatcha, one of the Numbers, entered the fray. As Kid, Killer, Luffy, and Zoro ran to the castle, they were able to defend against Apoo's next attack by covering their ears.
Inside the castle, Kid and Killer got separated from their allies and found themselves fighting against several Gifters. As the Ninja-Pirate-Mink-Samurai Alliance began their all-out war on the Beasts Pirates, Kid and Killer were aided by some of the rebels. In preparation for the fight with Kaido, Kid began using his magnetic powers to collect all the loose metallic objects on his way to the roof. As Kid and Killer reached the third level of the castle, the pile of metal had grown to fill the whole corridor.
The two later reached the roof, where they were soon joined by Law, Zoro, and Luffy as they prepared to fight against Kaido and Big Mom. Kid was briefly surprised when he saw Luffy hurt Kaido. After Law sent the Red Scabbards and Izo to safety, Kid scoffed at the Surgeon of Death for being subservient to Luffy though Law insisted that he planned to help them either way. When Luffy challenged Kid and Law to a game of chicken in the face of Big Mom's attack, the two initially refused. However, after a small taunt from the Straw Hat captain, the two took up his challenge, with all of them ending up taking the full brunt of the attack. They quickly recovered, and the five members of the Worst Generation took a strike at Kaido. However, Kaido transformed into his dragon form and joined Big Mom in the sky, preparing to battle.
Kaido used a roar to unleash wind blades at his opponents. Kid's metal golem armor was struck but Kid remained unharmed. With his metal armor, Kid grabbed Kaido and slammed him into the roof. Later, Big Mom unleashed a lightning storm at the five Supernovas. Kid managed to block some of her thunderbolts, but was caught off guard by a lightning homie. After Luffy pummeled Kaido with Gomu Gomu no Kong Gatling, Kid and Killer tried to continue on the offensive, but Kaido stopped them by creating some twisters. Zoro managed to slice through Kaido's scales, but Kaido responded by launching wind blades at the five Supernovas.
Kid and the other Supernovas eventually agreed that they had to split up Big Mom and Kaido somehow, otherwise they had no chance of winning. After surviving a combined attack from both Emperors thanks to Zoro's effort, Kid and Law elaborated a plan to separate Big Mom's special homies from her person. Kid used his powers to form a metal box so Law could teleport Zeus inside, while Zoro and Killer dealt with Prometheus and Napoleon respectively. Once Big Mom was fully disarmed, Kid shot metal spears at Big Mom, but was punched down into the ground by the Emperor in return. He, however, took the opportunity to grip Big Mom's arm with his own prosthetic arm, allowing him to Repel her up in the sky, from where Law managed to hit her with a boulder, throwing her off Onigashima.
Once Prometheus and Napoleon left Onigashima to rescue Big Mom, Kid and Killer followed after them to the edge of the island. There, Kid noticed something strange happening to the clouds in the sky. It turned out to be Big Mom creating a new homie, Hera, whose power she tested out on Kid and Killer as she headed back to Onigashima on Prometheus. Kid and Killer tried to avoid the way of Big Mom's Fulgora attack, but were hit and sent flying back inside the Skull Dome, in the third floor of Kaido's Castle. Kid and Killer survived with few injuries and noticed that Big Mom was searching for them somewhere in the floor below. Kid ran off after her, but was stopped by Basil Hawkins, his former ally and who Kid considered a traitor. Killer told Kid to keep going while he stayed behind to keep Hawkins busy, which Kid complied.
Once Kid reached the second floor, he noticed some of Kaido's grunts alerting each other about Big Mom's location and headed towards the ruckus. Kid eventually found Big Mom as she was about to strike down Nami, Usopp and Tama, using his Punk Gibson technique to block Big Mom's sword and then slam her down to the floor. Kid told the Straw Hats to leave Big Mom to him, as the latter recovered herself from the attack. As Kid fought Big Mom, he listened to Bao Huang's announcement that Luffy had died against Kaido, seemingly with indifference, but was later shown smiling when Momonosuke confirmed the opposite in an announcement of his own. Eventually, Law made his way to the site of his fight with Big Mom, at which point the Surgeon of Death proposed a temporary alliance with Kid.
In the Legacy of Chris Thorndyke,
And he is reprised by Justin Cook in the English dub and Daisuke Namikawa in the Japanese dub.