Eustass Kid

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. 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, Kaidou. 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.

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 Kaidou 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 Kaidou. 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 Kaidou 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 Kaidou. 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 Kaidou 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 Kaidou. 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 Kaidou, 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 Kaidou and Big Mom. Kid was briefly surprised when he saw Luffy hurt Kaidou. After Law sent the Red Scabbards and Izou to safety, Kid scoffed at the Surgeon of Death for being subservient to Luffy (since Law only acted after Luffy asked) 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 Kaidou. However, Kaidou transformed into his dragon form and joined Big Mom in the sky, preparing to battle. Kaidou 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 Kaidou 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 Kaidou with Gomu Gomu no Kong Gatling, Kid and Killer tried to continue on the offensive, but Kaidou stopped them by creating some twisters. Zoro managed to slice through Kaidou's scales, but Kaidou 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 Kaidou 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 Kaidou'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 Kaidou'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, Bao Huang announced that Luffy had died against Kaidou. Kid professed indifference to Luffy's fate but smiled when Momonosuke confirmed the opposite in an announcement of his own. Shortly after, Law made his way to the site of Kid's fight with Big Mom and proposed a temporary alliance with Kid. During the fight, Kid was thrown off when he received injuries from Killer's attacks on Hawkins. An adult Momonosuke in his dragon form and with Luffy riding him flew into the Skull Dome and crashed through several floors, interrupting the fights there.