Chapter Summaries

Haku drove off an attacking Sea King with Conqueror’s Haki, then began teaching Nami how to use the Rumble-Rumble Fruit. He explained its abilities and weakness, leaving the crew aboard the Sunny as they prepared for the voyage ahead.

• A Sea King charged toward the Sunny, but Haku used Conqueror’s Haki and ordered it away, causing it to flee.
• Zoro praised Haku’s strength and mentioned Mihawk’s high opinion of him, prompting Haku to say he looked forward to their future swordsmanship contest.
• Haku offered to train Nami with her new Rumble-Rumble Fruit and explained Logia elementalization.
• Haku thrust a Golden Holy Spear into Nami to demonstrate elementalization, but she pinned him down and beat him while the crew ignored his pleas for help.
• Haku explained the fruit’s lightning attacks, enhanced Observation Haki, teleportation, and other abilities, then warned that insulators were its weakness.

Haku trained Nami to master the Rumble-Rumble Fruit as the Thousand Sunny descended toward Fish-Man Island. After Luffy and the others fought a giant octopus, it surrendered and led the Sunny toward the island.

• Haku demonstrated the Rumble-Rumble Fruit's limitations and applications, then trained Nami in controlling lightning and using it with Observation Haki.
• Nami rapidly mastered the Rumble-Rumble Fruit as the Thousand Sunny approached the ocean floor and Fish-Man Island.
• Haku sensed Noah's Ark and an object flying toward the Fish-Man Island palace, but decided to spare Vander Decken IX for the sake of his Mark-Mark Fruit.
• Luffy, Zoro, and Sanji attacked a giant octopus that approached the Sunny, and the octopus surrendered to Luffy.
• Luffy accepted the octopus as a crewmate, and it led the Sunny toward Fish-Man Island.

Haku left the Sunny to speak with a colossal Sea King, which mistook him for Joy Boy and questioned how he knew about the new Poseidon. Haku offered to help her overcome her predicament and agreed to try, though he had conditions.

• Haku sensed a giant Sea King and left the Sunny, telling the crew to continue to an uninhabited island without him.
• The Sea King asked whether Haku was Joy Boy, and Haku explained that he wanted to talk about the new Poseidon.
• Haku told the Sea King he could foresee the future and offered to help Poseidon, whose abilities had not fully awakened.
• The Sea King explained that it and its companions could not interfere in human and merfolk affairs unless Poseidon was in danger.
• Haku said he could kill the man hiding in Noah but agreed that doing so would not solve the underlying problem.
• Haku agreed to try helping Poseidon and said he had conditions.

Haku secured a promise from a Sea King to help Princess Shirahoshi’s future allies, then entered Fish-Man Island. After sensing Shirahoshi inside the Hard-Shell Tower, he invited her to come out, leaving her torn between fear and hope.

• Haku used his Conqueror’s Haki to bargain with a Sea King, which agreed not to refuse Shirahoshi if she needed help in the future.
• Several Sea Kings gathered at Noah and discussed Haku, his agreement, and whether he might fulfill an old promise.
• Haku entered Fish-Man Island and observed its inhabitants and the troubled Fish-Man District, but chose not to intervene there.
• Haku sensed Shirahoshi’s Observation Haki inside the Hard-Shell Tower and invited her to come out.
• Shirahoshi felt frightened and uncertain, but Haku’s message also stirred her longing to leave the tower.

Haku arrived at Fish-Man Island and offered Shirahoshi a chance to leave the Hard-Shell Tower, while Jinbe urged King Neptune to hear Haku’s claim that Queen Otohime’s murder had a hidden truth. The palace learned the Straw Hat Pirates had arrived, and Haku’s voice announced that Jinbe’s guess about his arrival was correct.

• Shirahoshi paced inside the Hard-Shell Tower, torn between wanting to see the outside world and fearing it.
• Jinbe told King Neptune and the princes that Haku might reveal another truth behind Queen Otohime’s death, despite their distrust of humans.
• Jinbe persuaded Neptune to give Haku a chance to explain what he knew.
• Right Minister identified the people who had fallen between the bubble shields as the Straw Hat Pirates.
• Jinbe guessed that Haku had come with Luffy and the others, and Haku confirmed the guess from outside the palace.

Haku visited King Neptune to propose a plan to expose the mastermind behind Queen Otohime’s death, promising to deal with Vander Decken IX and protect Shirahoshi. Neptune agreed to consider the plan if Haku resolved the threat, and Haku went with the Right Minister to the Hard-Shell Tower to see Shirahoshi.

• Haku arrived at the palace and asked King Neptune to ensure those present would keep their discussion private.
• Haku said he had clues about the truth behind Queen Otohime’s death and proposed a plan to lure the real murderer into the open.
• The Right Minister warned that the plan could endanger Fish-Man Island, while Jinbe questioned Haku’s credibility.
• Haku offered to deal with Vander Decken IX and protect Shirahoshi, prompting Neptune to agree to consider carrying out the plan.
• Haku went with the Right Minister toward the Hard-Shell Tower, and the minister said Shirahoshi was doing well but longed to see the outside world.

Haku visited Princess Shirahoshi in the Hard-Shell Tower and stopped Vander Decken IX’s weapons from reaching her. He asked whether she wanted to leave the tower, but the Right Minister objected, and after another attack Shirahoshi lost hope of going outside.

• Haku promised the Right Minister he would personally deal with Vander Decken IX and stopped an axe aimed at the Hard-Shell Tower.
• Haku met Shirahoshi, who recognized his voice from their earlier exchange outside the palace.
• Haku asked Shirahoshi if she wanted to go outside, but the Right Minister insisted it was too dangerous.
• A great sword flew toward Shirahoshi, and Haku halted it with an invisible force before the doors were shut.
• Shirahoshi began sobbing and gave up on leaving the Hard-Shell Tower.

Haku helped Shirahoshi overcome her fear and leave the Hard-Shell Tower, while Neptune and the others focused on a plan to uncover the truth behind Queen Otohime’s death. Shirahoshi grew more comfortable exploring Fish-Man Island and asked Haku to take her somewhere, and he prepared to go.

• Haku pressured Right Minister to return to the palace and trusted Shirahoshi to decide whether to leave the Hard-Shell Tower with him.
• Right Minister reported to Neptune that Haku had taken Shirahoshi out, but Jinbe argued that Haku could protect her and Neptune allowed her to go.
• Neptune directed Shark Star and the others to continue their plan, watching for a Fish-Man District attack that could reveal who had plotted Queen Otohime’s death.
• Haku guided Shirahoshi around Fish-Man Island, answered her questions about the surface, and helped her communicate with marine life and command small Sea Kings.
• Shirahoshi asked Haku to take her to a place she wanted to visit, and Haku launched a gold coin using the principles of the Railgun.

Haku took Shirahoshi to the Sea Forest, where she visited her mother’s grave and reunited with Robin and Franky. When pirates hurled toward Fish-Man Island closed in on Shirahoshi, Haku prepared to defend her.

• Haku stopped a spear aimed at Shirahoshi, then used instantaneous movement to take her from Hard-Shell Tower to the Sea Forest.
• Haku and Shirahoshi met Robin, and the three entered the Sea Forest together.
• At the Thousand Sunny, Franky and Tom recognized Shirahoshi, who then went to her mother’s grave.
• Haku told Robin to look for the Poneglyph while he stayed to protect Shirahoshi.
• Haku spotted pirates flying toward the Sea Forest and invoked Binding Arts, Number 81: Broken Sky.

Haku protected Shirahoshi from a group of pirates Vander Decken IX had thrown toward her, then sent the pirates floating back to Ryugu Palace. When Luffy and Jinbe arrived, Haku realized the Straw Hats had already become entangled in a clash at the palace, leaving it vulnerable to Hody Jones's invasion.

• Haku blocked the pirates from hitting Shirahoshi and warned them not to provoke him.
• A pirate attacked Robin, but Haku killed him with a flash of lightning.
• Haku used golden nails imbued with the Float-Float Fruit's power to send the remaining pirates drifting toward Ryugu Palace.
• Robin went to search for the Poneglyph while Shirahoshi turned toward the royal tombs.
• Luffy and Jinbe arrived, and Haku realized the Straw Hats and Neptune's sons had left Ryugu Palace fallen, allowing Hody Jones and his allies to invade.

Haku told Luffy, Jinbe, and Shirahoshi that King Neptune had been captured after events at Ryugu Palace spiraled out of control, while Hody Jones threatened to execute Neptune and drown Zoro and two other Straw Hats. As Nami and the others gathered in the Sea Forest, Hachi revealed Haku had killed Arlong, and Haku sensed new arrivals approaching.

• Haku explained that Luffy's companions had clashed with Neptune's forces at Ryugu Palace, leaving them tied up and enabling Fish-Man Street to capture Neptune.
• Shirahoshi cried and begged Haku to save her father, while Jinbe and Luffy prepared to help until Haku revealed Hody Jones's execution threat.
• Nami arrived with Kemi, and Sanji and Chopper brought the injured Hachi to the Sea Forest.
• Hachi recognized Haku as the man who had killed Arlong, and Nami confirmed she had moved on from her painful past.
• Jinbe apologized to Nami for Arlong's actions, and Haku sensed people approaching.

Vander Decken IX arrived at the Sea Forest to propose to Shirahoshi, but attacked her after she rejected him. Haku stopped him, severed his hand, and threw him out of Fish-Man Island, while the others questioned why Haku had spared his life.

• Haku spotted Vander Decken IX approaching, and Sanji knocked him down before he could reach Shirahoshi.
• Jinbe confronted Vander Decken IX, and Shirahoshi courageously rejected his proposal.
• Vander Decken IX threw an axe at Shirahoshi, but Haku deflected it and severed Vander Decken's left hand when he tried to touch him.
• Haku ordered Shirahoshi not to look, then grabbed Vander Decken IX and threw him out of Fish-Man Island.
• Jinbe asked why Haku had not killed Vander Decken, and Haku questioned whether he seemed bloodthirsty.

Hody Jones captured Shirahoshi and Jinbe and gathered 100,000 outlaws at Ghillie Court Square, believing he had secured control of Fish-Man Island. Shyarly then announced that her prophecy named Straw Hat Luffy as the man who would destroy the island.

• Haku told Luffy and the others they would likely be asked to help when they reached the square, while Jinbe worried about involving them.
• Hody Jones’s forces defeated Neptune’s three princes and tied them up with Neptune at Ghillie Court Square.
• Hody Jones learned that Shirahoshi had been captured and ordered her brought to him.
• Hody Jones’s subordinates also brought in Jinbe, and Hody announced that he had assembled 100,000 outlaws to prevent the Straw Hat Pirates from opposing him.
• Shyarly told Hody that her prophecy named Straw Hat Luffy as the man who would destroy Fish-Man Island.

Hody Jones revealed that he had murdered Queen Otohime and planned to use her death to fuel hatred between fish-men and humans. As Shirahoshi confronted him with the truth she had long known, Haku showed Shyarly the crimes Arlong had committed in the East Blue.

• Shyarly predicted that Hody Jones would not rule Fish-Man Island, and Hody struck her with a Water Attack.
• Hody Jones declared that Arlong's name had only been a tool and claimed that he alone had the power to reshape Fish-Man Island.
• Hody admitted that he had killed Queen Otohime, bribed a human scapegoat, silenced a witness, and framed humans for the murder.
• Hody boasted that he would enslave humanity, then attacked Neptune and taunted Shirahoshi about killing her mother.
• Shirahoshi revealed that she had known Hody killed Otohime, while Haku appeared beside Shyarly and confirmed that he had killed Arlong.
• Haku used Fullbring to show Shyarly Arlong's memories of his crimes in the East Blue, leaving her shocked and pained.

Haku explained why he had killed Arlong and noticed Vander Decken IX moving toward Noah as Luffy and the Straw Hat Pirates faced Hody Jones. Vander Decken planned to use Noah against Shirahoshi, while Luffy unleashed his Conqueror's Haki on Ghillie Court Square.

• Haku told Shyarly that Arlong's crimes had forced him to kill her brother, leaving Shyarly conflicted.
• Vander Decken IX blamed Shirahoshi's rejection on Haku, vowed to kill them both, and ran toward Noah after devising a plan.
• Haku noticed Noah moving and warned Luffy that a major threat was approaching.
• Hody Jones challenged Luffy and the Straw Hat Pirates with his one hundred thousand outlaws, while the crew prepared to fight.
• Luffy released his Conqueror's Haki across Ghillie Court Square, making the outlaws drop their weapons.

Haku and Luffy knocked out the remaining attackers with Conqueror's Haki while Noah threatened Fish-Man Island. After Haku revealed that Vander Decken had made Noah target Shirahoshi, she chose to lure the ship away and ran toward the island's exit.

• Luffy used Conqueror's Haki to knock out about fifty thousand people, while Haku noticed Noah approaching faster than expected.
• Haku flew above Ghillie Court Square and used his stronger Conqueror's Haki to knock out forty thousand more outlaws.
• Haku warned Luffy that Noah was about to destroy Fish-Man Island and told Shirahoshi that Vander Decken had made the ship track her.
• Shirahoshi ran toward the exit to lure Noah away, and Neptune ordered Shark Star and his brothers to follow and protect her.

Neptune asked Haku to save Shirahoshi and agreed to break ties with the BIG MOM Pirates. Haku tried to force Shirahoshi’s power to awaken by letting Hody Jones and Vander Decken endanger her, but the crisis continued as Luffy struggled to get back into the fight.

• Neptune begged Haku to save Shirahoshi, and Haku asked whether he would break ties with the BIG MOM Pirates; Neptune agreed.
• Haku sent Luffy toward Noah with oxygen-generating coral and told Nami and the others to defeat the remaining enemies.
• Haku met six Sea Kings, then watched Hody Jones overpower the three princes and Luffy after taking another energy steroid.
• Haku threw Vander Decken toward Hody Jones, who stabbed him and resumed attacking Shirahoshi.
• Shirahoshi despaired as Noah threatened Fish-Man Island, while Luffy stood up inside Noah and struggled against the terrain.

Haku pushed Shirahoshi to awaken her power as Poseidon while Noah fell toward Fish-Man Island. Shirahoshi summoned the Sea Kings to save the island, and Haku revealed that Vander Decken had died and left behind a Devil Fruit.

• Haku pulled Hody Jones into Noah, then told Shirahoshi he would not help her and warned that the ark was falling as Vander Decken's power was failing.
• Haku urged Shirahoshi to listen to the sea and awaken her power, calming her when the falling ark nearly broke her concentration.
• Shirahoshi awakened her ability to communicate with the Sea Kings and summoned them to Noah.
• The Sea Kings caught Noah with their tentacles and jaws, raised it, and carried it away from Fish-Man Island as the residents cheered Shirahoshi.
• Haku brought Vander Decken's corpse out of Noah and tossed a newly obtained Devil Fruit in his hand.

Haku helped Fish-Man Island defeat Hody Jones and privately offered Neptune an alliance with the Revolutionary Army. He suggested moving Fish-Man Island to the surface to protect its people from a future war, but Neptune doubted the plan.

• Haku used what he had learned from Shirahoshi to begin mastering her power to control the Sea Kings.
• After Luffy defeated Hody Jones, Haku teleported Shirahoshi, Luffy, and Hody Jones to Ghillie Court Square, where Fish-Man Island's residents celebrated Luffy's victory.
• Haku told Neptune that he was commander of the New Marines and a strategic partner of the Revolutionary Army, and Neptune agreed to cooperate if war's effects on Fish-Man Island could be limited.
• Haku proposed that Fish-Man Island migrate to an island on the surface when the Revolutionary Army confronted the World Government, but Neptune questioned whether the move was realistic.

Haku tried to persuade Neptune to ally Fish-Man Island with the Revolutionary Army, revealing that Imu might control Uranus and that he knew where Pluton was. After sensing a thief on the island, Haku caught Caribou, who had been looting Ryugu Palace’s treasury.

• Haku promised Neptune that the Revolutionary Army would support Fish-Man Island and help create a suitable island for its people if the World Government fell.
• Neptune asked Haku about the Revolutionary Army’s chances, and Haku warned him that Imu sat above the Celestial Dragons and might possess Uranus.
• Haku told Neptune that Shirahoshi was Poseidon and that he alone knew where Pluton was.
• Haku sensed an unresolved thief on Fish-Man Island, then swiftly captured Caribou as he stuffed stolen goods into his chest.
• Caribou begged Haku to spare him, and Haku mocked him for nearly emptying Ryugu Palace’s treasury.