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The story of Kaido from the One Piece anime and manga franchise.
Past[]
Hailing from the Vodka Kingdom, Kaido's homeland was frequently invaded by looters and was enlisted as a child soldier at a mere ten years old. Three years later, he was classified as the strongest soldier but his behavior caused the king to betray Kaido and sell him off to the World Government to make Kaido as a Marine as well Vodka Kingdom will have the right to attend the Levely. Enraged from this betrayal, Kaido refused to become a Government's "dog" and broke free of the battleship carrying him and was given a bounty of 70,000,00 by the marines. He struggled to survive on his own, so he'd allow himself to be captured in order to plunder food and repeating the cycle of escaping.
Kaido with the Rocks Pirates.
Two years later, he wounded up at Hachinosu where he picked fights before he was invited by Whitebeard to become an apprentice and a member of the Rocks Pirates under the leadership of Rocks D. Xebec. Kaido was a member alongside, Whitebeard, Charlotte Linlin, Shiki the Golden Lion, Captain John, and a few others. At one point he was violently reprimanded by Rocks after he suggested that they forcefully takeover King Haralds country of Elbaph. Kaido along with his crew gained an infamous reputation for stirring up chaos in the New World often clashing with the Roger Pirates and the Marines. During this time Kaido formed a bond with Linlin and they proved to be a capable team, it was during this period that Kaido grew interested in attaining a devil fruit like his crewmates.
Kaido aids in the attack on Imu.
38 years ago, he and his crew once attacked a place in the New World called God Valley where the Celestial Dragons were present with their slaves in order to rescue Shakuyaku. He and senior members of the crew were forced to make a temporary retreat after they were confronted by the Vice Admiral Monkey D. Garp. During the chaos, an eager Kaido attacked Linlin by surprise and stole the Fish-Fish Fruit, Model: Azure Dragon she had intended on giving to her son. Immediately transforming, Kaido regrouped with Whitebeard and Rocks showing off his devil fruit as the two were anticipating the arrival of Imu. Kaido asked Rocks to let him fight Imu with him, though his attention was turned to a furious Linlin that was preparing to launch an attack on him. As Rocks, Newgate,Roger, and Garp launched their attacks on Imu, Kaido proceeded to fire a powerful blast at the monarch while Linlin's attack narrowly missed him. After Rocks was transformed into a demon by Imu, Kaido was swiftly incapacitated by his captain. Afterward Kaido decided to flee realizing the Rocks Pirates were disbanding, before he was confronted by a furious Linlin who told Kaido he was in her debt for as long as he lived, though Kaido refused this and told her would start a new crew of violence that would surpass Linlin's before going their separate ways. Afterward the island where the battle took place disappeared and was no longer recorded on any maps while the demonic Rocks was killed.
Kaido would eventually be captured and used as a test subject by the World Government. 34 years ago he escaped and recruited a Lunarian named Alber who named him as King. A year later Kaido would also attempt to recruit a MADS scientist named Scien, who would eventually join his crew 7 years down the line under the name Queen.
28 years ago, Kaido's only offspring Yamato was born when he was 31. 23 years ago, Kaido slaughtered Gecko Moria's comrades when the latter traveled to Wano to kill him. At some point the World Government would declare Kaido as one of the Four Emperors.
20 years ago, Kaido and the Beasts Pirates caught onto Kurozumi Orochi's plot to take over Wano Country. Kaido entered into an alliance with Orochi to take down Kozuki Oden, the Kozuki family and their allies. With the Beasts Pirates, Kaido pillaged Oden's castle and murdered many members of the Kozuki Family. Momonosuke, Kin'emon, Kanjuro, Raizo, and Kiku managed to escape from Kaido with Kozuki Toki's time-time devil fruit. Kaido resided in Wano Country on an island called Onigashima where he has political power over the entire country. Over time, Kaido sets up multiple factories on Wano Country to manufacture weapons and tools. As a result of this practice, most of the food in the Wano Country is uneatable and the water is undrinkable. However, Kaido's and Orochi's food and water supply are clean. Kaido also allows his men to have authority over some parts the country.
Ten years before the events of Wano Country, Wano citizens who were supporters to Kozuki Oden decided that they could not wait any longer for Kin'emon's return. Many men sailed from Wano to Onigashima Island in an attempt to kill Kaido, defeat the Beasts Pirates, and save the country from Orochi's rule. However, Kaido and his forces were able to kill most of Oden's supporters and continue his reign over the country.
Four years ago, Kaido took in Page One and Ulti into his crew as he was on good terms with their warlord father Hanafuda, his former rival and friend.
Kaido met Donquixote Doflamingo and Caesar Clown and became affiliated with them to make a bargain. In their bargaining deal, Doflamingo would help produce artificial devil fruits to enhance Kaido's army with the help of Caesar. Kaido and Orochi also obtained the smile devil fruit that ended up effecting many citizens in the country by only allowing them to smile and laugh.
Summit War Saga[]
Before the Marineford War, Kaido and King attempted to attack Whitebeard but Shanks and his crew intervened and they fought. Its unknown what happened in the battle but Shanks arrived at Marineford a day later unharmed.
Time Skip[]
Kaido learned that Momonosuke, Kin'emon, Kanjuro, Raizo, and Kiku were in the Wano Country. Kin'emon and his allies with the exception of Kiku left Wano. When the Kozuki retainers made it passed Zou and onto Dressrosa, Kaido ordered Doflamingo to capture them. However, Momonosuke ended up getting captured by Caesar's men in the process. At the same time, Kaido was also interested in capturing Raizo who ended up going to Zou. Jack tried to track Raizo.
Dressrosa Saga[]
Dressrosa Arc[]
Luffy and Law decides to create an alliance so that they can take down one of the Yonko, Kaido. With the SAD factory on Punk-Hazard destroyed, the Straw Hats and Law wants to destroy Kaido's SMILE factory in Dressrosa so that it can lower Kaido's army power.
After learning about Doflamingo's defeat and the destruction of the SMILE factory by the Straw Hat and Heart pirates alliance, his men tried to inform him about the news. Kaido, however, appeared on the Sky Island called Balloon Terminal. He attempted to commit suicide by free falling at a height of 10,000 meters to hit the ground below. He landed at the base of Eustass Kid and survived the fall complaining about a headache. He came out the hole and began speaking about Joker and his desire to make him prepare for a massive war.
Yonko Saga[]
Zou Arc[]
Kaido appeared on an island with his subordinates. He was drinking sake after hearing about Doflamingo's defeat at the hands of Luffy and Law. He was sad at first that he would not be able to achieve his goals of getting a devil fruit only crew. His depressive mood turn to wrath when he saw the wanted posters of Luffy and Law and attacked his crew mates with a giant mace out of spite. Kaido said that their decision to take down Doflamingo have now caught his attention and that he will be going after them. He began insulting Kid who happened to have been defeated in their confrontation before. Kaido stated that the Supernova are simply playing a pirates game.
Reverie Arc[]
Kaido reads the newspaper of Luffy's actions in Big Mom's territory and wondered why he was in her territory. A couple days later, Big Mom called Kaido wanted to form an alliance with him but he refused. Big Mom told Kaido to not kill Luffy when he makes it to Wano Country as she wants to kill him to save her reputation. Big Mom also reminds Kaido of his debt to her but the latter said it was a long time ago. Kaido refused and threatened to kill her if she comes to Wano Country. Big Mom insists on working together like they used to do in the past.
Wano Country Arc[]
Kaido, in his dragon form, appeared in the sky above Okobore Town in the Wano Country. He commands Jack to capture Monkey D. Luffy. As Kaido levitates over Okobore Town, civilians start to run for their lives as Kaido flies over the town. Kaido recognized Shutenmaru in the crowd of people and told him that he forgets the past and that he can join his crew. Shutenmaru refuses the offer and runs away. Jack realized that Kaido is drunk. Basil Hawkins appear and informed Kaido that Luffy and Law are both hiding in the ruins of Oden's castle. Kaido flew to Oden's castle and destroyed it with his heat breath attack. Angry that Kaido attacked his crew mates, Luffy punched him in the head with his elephant gun attack.
Kaido was sent crashing to the ground. Luffy introduces himself to Kaido. After which, Kaido attacks him with his heat breath attack but the latter dodges him and attacks him with elephant gun. Kaido fell down from the attack and reverts to his humanoid form. Luffy changes to his Gear Fourth form and continues to pummel him with his punches. Kaido gets up without sustaining any injuries and strikes Luffy with his giant mace knocking him out of his Gear Fourth Form and knocking him unconscious. After knocking him out, Kaido orders his men to send Luffy to his prison so that he can break the young pirate's spirit and have him work for him. Kaido notices Luffy glaring at him despite being unconscious. Kaido transforms back into his dragon form and says that he will go after Trafalgar Law later after he gets drinks to get drunk.
Kaido hears news from his minions that Big Mom and her pirate crew are trying to enter Wano Country. Enraged, Kaido demands that his minions sink Big Mom's ship so that she does not enter the country before they would have an all-out war. He states that if she arrives in Wano it would cause a war. Kaido later gets news that one of his three calamities, King, managed to stop the Big Mom Pirates from entering the country much to Kaido's relief.
Kaido calls Queen via den-den mushi to inform him that Komurasaki is dead and that he is serious despite being intoxicated. Kaido smiles and watches the execution of Yasuie remarking on Orochi's cruelty.
Kaido appears and orders his men to remove the seastone chains from Big Mom (who was taken taken to Onigashima by after she appeared in Udon Prison). Kaido tells Big Mom that he will kill her for entering Wano. Big Mom says that she have not journeyed to Wano to be killed and proceeds to use her bicorne, Napolean, as sword. Kaido uses his spiked mace to clash with Big Mom's sword, as they prepare to fight to the death. Kaido and Big Mom continue to fight all throughout the night into the next day. At some point in their battle, Kaido and Big Mom ended their battle and decide to form an alliance for unknown reasons. Kaido then got news from Apoo that he and the numbers have arrived in Wano and that they will be attending the banquet. Kaido drinks his alcohol and Big Mom eats her o-shirukos. Queen wonders why they are so happy around each other and the two reveal that they are allies and they intend to conquer the world, stating that the two of them can go back to killing each other afterwards.
The evening of the Fire Festival, Kaido is shown to be drunk. He calls out to his subordinates to find his son, Yamato. He wants the Flying Six to meet Big Mom. His subordinates tells him that Big Mom is changing into a kimono at the moment and that they will try to locate his son. Kaido meets with the Flying Six, Jack, and King. When King revealed that he was the one who summoned the Flying Six, Kaido tells them that he wanted them to meet Big Mom but says that she is still changing into her kimono. He then called out one of his assistants, Bao Huang, to read off his schedule for the evening. Kaido orders the Flying Six to locate his son, Yamato, during the Fire Festival. He tells them that if they find his son then they will have a chance of fighting All-Stars so that they can have an opportunity to become an All-Star. King and Jack, both agrees to his terms.
Kaido is seen celebrating the Fire Festival. Black Maria stays close by his side instead of trying to find Yamato. Orochi and Kaido both talk about the downfall of the Kozuki Family, how Oden kept the secret from the Nine Red Scabbards, and the Orochi's spy, Kurozumi Kanjuro. Kanjuro appears in the room where Orochi and Kaido were at and Kaido yells at his men to not harm Kanjuro. Kanjuro shows Kaido, Orochi, and Black Maria the battered Momonosuke. Kaido noticed that Momonosuke looks the same as he was twenty years earlier. Kanjuro tells Kaido and Orochi that his mission to stop the Nine Red Scabbards have failed and that they are soon to arrive in Onigashima.
Kaido later leaves his room and wonders where Big Mom is. He chastises Bao Huang for not telling him sooner about Big Mom's location since she is arriving to the area where Orochi is planning Momonosuke's execution. Kaido appears alongside Jack, Queen, and King and interrupts Orochi's speech to the Beasts Pirates about Momonosuke. Kaido announces to his crew that he have a plan called the "New Onigashima Project". On a den-den mushi broadcast, Kaido announces to the Beasts Pirates that he will be going after the Ancient Weapons and will have the Beasts Pirates team up with the Big Mom Pirates to find the One Piece. Kaido then announce that he will be moving Onigashima to the Flower Capital and that he will force Wano's citizens into slavery to help empower the country as a lawless pirate empire. He states that he will use the power that he have to wage a war on the world. Orochi was against Kaido taking the Flower Capital and Kaido responds by decapitating him with King's sword to Orochi's men's horror. Kaido states that Orochi's men have the choice to join him or face becoming slaves or getting killed by the Beasts Pirates. Kaido then states that he will make Yamato the shogun of Wano and will start the plan tonight.
Kaido proceeds to ask Orochi's men if they will join him or die. He states that if they do not join him, he will show some respect for going against him. Orochi's men decides to join Kaido's side immediately. Kaido asks Momonosuke for his name. He tells Momonosuke that if he says that he is a different person, then he will cancel the execution and release him. After some moments, Momonosuke boldly told Kaido that he is who he is and that he desires to become the shogun of Wano. Kaido was frustrated by Momonosuke's response and proceeds to get to the execution until an explosion caught his attention. As Kaido looks down the stage to see what is going on, the Nine Red Scabbards appear behind him and the All-Stars. Some of the Scabbards take on one of the All-Stars as Nekomamushi disarms Kaido. Kaido is surprised to see Kyoshiro charging at him with Kinemon, still unaware that Kyoshiro is Denjiro. Kaido is surprised for a moment and sees an image of Oden as he was charging at him in the past. The group proceeds to attack Kaido and fall off the stage.
As Kaido falls off the stage, the scabbards proceed to wound him by stabbing him. Kaido briefly reminisces about Oden and his execution during the Legendary Hour and Oden's last words to him. Kaido wonders why he can be injured and for a moment can feel the pain from the scar Oden gave him. Kaido screams in pain and falls onto the ground. Kaido gets up and gets into a brief skirmish with the scabbards. Kaido says that what Orochi was saying was the truth about the scabbard's return in 20 years. Kaido also realizes that the scabbards are allied to Luffy and tells them that pirates will betray them. As Kinemon tells him that Luffy is different and will bring the dawn to Wano, Kaido overhears Luffy declaring war on him and vowing to defeat him and his allies. Kaido transforms into his dragon form and responds to Luffy as he flies to the top of skull dome. Kaido tells the scabbards that he is interested in the battle as he has sobered up and reminded them that things are different since Oden is not there. Nekomamushi tells Kaido that it is a full moon and that he brought the minks out to help fight against him. Kaido acknowledges the minks that are coming to the Scabbards's defense. Jack, Nangi, and other Beasts Pirates arrive to assist Kaido against his enemies. Kaido and his subordinates begins to fight. Kaido and the Nine Red Scabbards spectate as both their forces clash.
When Jack is severely wounded in battle against the Scabbards and their allies, Kaido says that his enemies were too stronger than him and lets him leave the battle to recover. Kaido tells his enemies that he will not allow them to harm his strong subordinates like Jack. Kaido begins his battle against the Nine Red Scabbards. Although he knocks back Kawamatsu, his blast breath is redirected by Raizo and he is wounded by the scabbards combined sword attack. Kaido remarks that their attack was not as deep as Oden. Kaido continues to battle the Scabbards until he lops off Kiku's arm. Kaido reverts back to his humanoid form and continues his battle against the Scabbards. Kaido manages to defeat the Scabbards and use his powers to lift the entire island of Onigashima into the air. Kaido states that he wants to start his New Onigashima project soon and usher in his new pirate paradise. As the commotion and the raid continue on the island, Kaido keeps Onighashima levitating above the water. Big Mom soon joins him and they have their conversation. Big Mom tells Kaido to only spare Nico Robin's life as they would need her to help them decypher the information on the poneglyphs and find the One Piece. Kaido asks about her daughter, Charlotte Pudding, only for Big Mom to say that her powers has not developed yet. Kaido asks Big Mom if it is too early for her to show her true colors to which Big Mom angrily says to Kaido to not underestimate her and that she still sees him as her younger brother. She reminds Kaido that she gave him his devil fruits after the Rocks Pirates fell and that he owes her a life long debt. Kaido says that they can resolve their problems after they obtain the One Piece.
Kaido and Big Mom watch as the Supernovas, Eustass Kid, Killer, Roronoa Zoro, and Trafalgar Law gather before them. When Luffy appears among the group, Kaido tells Luffy to repeat what he says about being the Pirate King to him in a blunt and mocking tone. As Big Mom and Kaido waits for Luffy's response, Luffy ignores them and checks in on a battered Kinemon to see how he was doing since Kaido defeated the Nine Red Scabbards. When Kaido presses Luffy to respond to him, Luffy catches Kaido off guard with a powerful Gear Third Attack that manages to injure him. As Big Mom looks on in surprise and wonders how Kaido could allow himself to get attacked easily, Kaido has a surprised and angry look as he looks at Luffy who states that he intends to become the Pirate King.
Kaido insults Luffy over his comment. He wonders how Luffy's attack could damage him and what happened to Luffy when he was imprisoned in Udon. Kaido wonders if Luffy is at the same level as Gol D. Roger, Shanks, Kozuki Oden, Rocks D. Xebec and Whitebeard. Kaido attempts to knock Luffy out with his giant mace, but Luffy barely avoids the attack. Kaido is impressed by Luffy's improvements since he last fought him and attempts to knock him out with his mace again. However, Law teleports Luffy out of the way. Kaido is attacked by Zoro and Killer who did not phase him. Kaido gets punched by Luffy's Gear Fourth Kong Gun, smashed by Kid's Punk Vice attack, and crushed by large sharp rocks from Law. Kaido emerges from the rubble in his dragon form and tells the Supernova captains that he and Big Mom will kill them and take their crew and poneglyphs. Kaido says that this battle will determine who is closer to being Pirate King.
The battle continues to intensify as the Supernovas attack Kaido. Kaido manages to avoid a Zoro's sword attack that slices off a piece of the skull's horn. Luffy uses his Gear fourth attack to repeatedly punch Kaido. Due to using his Gear Fourth form, Luffy had to return to his original form to regain his energy. Kaido continues to go after his enemeies despite suffering a severe beating from Luffy. Kaido bites down on Luffy and nearly swallows him, until Zoro saves Luffy. Zoro manages to cut Kaido causing him to bleed. Kaido thinks about Oden's presence in Zoro's sword. Kaido transforms into his hybrid form and joins Big Mom. He says that he is enjoying the battle to which she agreed. The two emperors proceed to overwhelm the supernovas to the point where they want to split them both up. As Big Mom deals with Law, Kid, and Zoro, Kaido fights Luffy on his own. Kaido dodges one of Luffy's attacks which makes the latter ask why it is that he dodged his attack. Kaido proceeds to attack Luffy with an energy blast and his mace.
After Big Mom get's thrown off of Oniganshina by the combined efforts of Law, Zoro and Kid Kaido comments on how pathetic she is and charges at Zoro to make him release Prometheus, only to be struck by Law using an "Injection Shot" attack to his neck. After Kaido manages to throw away Law calling his powers annoying he laughs at Luffy commenting on how he's glaring at him despite being unconscious just like their first encounter and comments on different ways he plans on taking the boy's life, to which Zoro interrupts him and uses the last of his strength to launch a powerful attack on Kaido, with the latter asking Zoro if he can use Conqueror's Haki, to his confusion. Kaido says that his attack will definitely leave a scar on him before knocking out Zoro and Law who was trying to help him, saying that if they had worked for him they would've conquered the world together. Luffy regains consciousness and tell Kaido that they will never work for him and reveals to Kaido that he knows he can imbue his attacks with Conqueror's Haki and make them even more powerful, Kaido laughs in confirmation as he charges for Luffy saying that only a handful of people can do such a thing as he brings his Hassaikai down on Luffy, who blocks the attack without touching it and then punches Kaido in the gut without making contact and delivering an uppercut that knocks him down on his back.
As Luffy begins to master the conqueror haki, he continues to fight Kaido on his own. Confident that he can defeat Kaido all by himself, Luffy tells Law and Zoro that they can leave him alone to Kaido. The two continues to fight unil Kaido defeats Luffy, knocks him unconscious, and throw him off the floating Onigashima into the waters below. Kaido comments on his disappointment in Luffy and that he was not like Joyboy. Kaido instructs Bao Huang, to tell everyone on the Onigashima the outcome of the battle. The members of the Luffy's alliance were shocked to hear the Luffy lost in his battle to Kaido. Kaido tries to look for Momonosuke where he was able to locate him along with Kinemon and Shinobu. As Momonosuke and Shinobu make their escapes, Kinemon tries to confront Kaido. Kaido immediately smashes Kinemon over the head with his mace.
Kaido clashed with his daughter, Yamato until Luffy and Momonosuke arrived. Luffy and Kaido clashed again until a CP0 agent interfered Kaido's fight (similar what happened in his fight with Oden). For the agent's inference, Kaido rapidly smashed the CP0 (the same thing he did with Kurozumi Higurashi). He intend to go down and finish with the others until he sensed Luffy is still alive and awakened his devil (revealing its true name as Hito-Hito no Mi, Model: Nika). Kaido continue to clashed Luffy and apologized to his enemy for CP0's intervention. Luffy and Kaido unleashed their final attacks where Luffy defeated Kaido with "Gomu Gomu no Bajrang Gun. Kaido finally acknowledge Luffy as "Joy Boy" before losing his consciousness.
Kaido fell into magma chamber deep within Wano. But he is not alone, Big Mom (who was defeated by Kid and Law) is also with Kaido, causing the massive eruption. This results of Kaido and Big Mom's presumably death.
It is currently unknown of his status, most of the Blackbeard Pirates (including Teach) believed Kaido is dead when the New Era begins while the old legends were torn down.
