Chapter Summaries

Moria pledged his life and loyalty to Natsu in exchange for the power to take revenge on Kaido, and Natsu sent him to Spirit Awakening Island. Natsu then watched Sasuke demonstrate his fire technique and prepared to teach him something new.

• Moria told Natsu he would give up his name, dignity, and freedom to gain the power to kill Kaido, and promised never to betray the Uchiha.
• Natsu warned Moria that betrayal would bring punishment worse than Kaido could inflict, then ordered him to report to Elder Tekka on Spirit Awakening Island.
• Natsu found Sasuke practicing Hand Seals in the courtyard, and Sasuke greeted him excitedly after waiting for two hours.
• Sasuke demonstrated Fire Release: Great Fire Annihilation, unleashing flames more than thirty meters wide across the lake.
• Natsu praised Sasuke's skill while cautioning him against pride, then prepared to teach him a new technique.

Natsu demonstrated how combining chakra natures could multiply a technique’s power, then trained Sasuke in combat and taught him to adapt after each defeat. As dinner began, Sasuke gathered his courage to tell Natsu something.

• Natsu used Shadow Clones to combine lightning, water, and wind over the lake, showing Sasuke how coordinated techniques could outmatch a flashy attack.
• Sasuke asked how to control two chakra natures at once, and Natsu explained chakra flow with diagrams before beginning practical training.
• Natsu set a Shadow Clone against Sasuke and challenged him to last three minutes; Sasuke was repeatedly knocked down but learned from his mistakes.
• Natsu ended the Taijutsu session and explained why Sasuke needed both Ninjutsu and Taijutsu.
• At dinner, Sasuke stopped eating, sat up straight, and prepared to say something to Natsu.

Natsu persuaded Sasuke that his talent and potential surpassed Itachi’s and agreed to train him, while Sasuke’s memories showed how his bond with Itachi had turned to hatred after the Uchiha clan fled Konoha and he learned of Itachi’s betrayal. The chapter left Sasuke excited to begin training under Natsu.

• Natsu explained that Sasuke’s academy record and hard work made him worthy of becoming his disciple.
• Natsu told Sasuke that his potential exceeded Itachi’s and urged him to prove it through training.
• Sasuke bowed to accept Natsu’s expectations, and Natsu scheduled lessons in ninjutsu, taijutsu, and genjutsu.
• Sasuke remembered how Natsu and Itachi’s relationship broke down after the Nine-Tails attack and how the clan later left Konoha without Itachi.
• After learning that Itachi had planned to help outsiders slaughter the Uchiha, Sasuke shut himself away until Natsu dragged him to the training ground and forced him to face his grief.

Sasuke settled into life on Origin Island, where Natsu trained him while Izumi helped care for them. Meanwhile, the first ten Night Owl Guard members completed the Heavenly Awakening Hall’s trial, and several awakened the Mangekyō Sharingan.

• Sasuke bought breakfast for Natsu and Izumi, then joined Izumi in waking Natsu at his home.
• Natsu got up and shared breakfast with Sasuke and Izumi, while Sasuke reflected on the peaceful life Natsu had fought to give the Uchiha.
• Natsu established a routine of teaching Sasuke ninjutsu and combat through nightly Shadow Clone training.
• Uchiha Setsuna, Tekka, Taoho, and seven Night Owl Guard members entered the Heavenly Awakening Hall while Uchiha Fugaku activated the Phantom Night Prison.
• After five days, the ten emerged; Setsuna, Tekka, Taoho, and two guards had awakened the Mangekyō Sharingan.

Natsu supervised the Uchiha Clan’s Mangekyo awakenings and Sage Mode training while deliberately limiting its reliance on him. As Fugaku, Kei, Yaoyu, and Yakumi made progress, Izumi surprised Natsu with her unusually delicate control of Susanoo.

• Natsu reviewed the results of ten Night Owl Guards entering the Phantom Night Prison, where five awakened Mangekyo Sharingan, including two of the seven who were not already near the threshold.
• Natsu decided to slow the Uchiha Clan’s expansion and let the Elder Council, Night Owl Guards, Heavenly Star Guards, and Earthly Chief Guards manage the clan’s challenges without his constant protection.
• Three more pairs awakened Mangekyo Sharingan, a girl at the Training Ground completed six hand seals in one breath, and Sasuke trained through repeated fights with Natsu’s Shadow Clones.
• Fugaku and Kei reached the edge of natural power, and Yaoyu and Yakumi eventually overcame their separate struggles to make their Susanoo absorb it.
• Yashiro, Setsuna, Tekka, and Taoho remained stuck trying to communicate with their Susanoo, while Izumi showed Natsu exceptional control over its half-activated state.

Natsu coached Sasuke in swordplay and warned him against reckless attacks as he trained to face Itachi. When Whitebeard arrived unexpectedly, Natsu considered the arrangements between the Uchiha and the Whitebeard Pirates and suspected the old man had come with a private matter.

• Natsu watched the trainees' progress while one of them remained unable to make Susanoo absorb Natural Energy.
• Natsu sparred with Sasuke, dodged his Fire Release: Dragon Flame Song, and criticized him for leaving himself exposed.
• Sasuke vowed he would not make such a mistake when facing Itachi.
• A Night Owl Guard told Natsu that Edward Newgate had arrived in person.
• Natsu recalled the Whitebeard Pirates' island, their service under the Uchiha, and the arrangements for Little Oars Jr. and Newgate's research and treatment.
• Natsu ended Sasuke's training and hurried to meet Newgate, suspecting he had come to discuss something privately.

Newgate asked Natsu to help protect Fish-Man Island from pirates capturing its inhabitants, and Natsu agreed to go there with Izumi. The chapter ended with Natsu telling a Night Owl Guard to report Newgate’s drinking to Marco.

• Newgate visited Natsu and eagerly drank the wine Natsu offered, teasing him for not drinking despite being fifteen.
• Newgate explained that pirates had begun capturing fish-men and merfolk after the Whitebeard Pirates withdrew from the New World.
• Newgate asked Natsu to go to Fish-Man Island because Marco could not deter the pirates, and Natsu agreed.
• Natsu decided to take Izumi along for a trip and a change of scenery.
• Natsu ordered a Night Owl Guard to tell Marco that Newgate was secretly drinking at Origin Island.

Marco caught Newgate drinking with Natsu and scolded him, while Natsu confirmed he would help with the troubles on Fish-Man Island. Natsu invited Izumi to join him on the trip the next morning, encouraging her to rest from her strenuous training.

• Marco arrived on Origin Island, took Newgate's sake away, and lectured him about neglecting his health.
• Natsu confirmed to Marco that he had agreed to help with the situation on Fish-Man Island.
• Natsu visited Izumi in the underground training room and saw her struggling to make her Susanoo draw in Natural Energy.
• Natsu told Izumi to stop training for the day and invited her to travel with him to Fish-Man Island the next morning.
• Izumi decided to take the next day off, followed Natsu, and switched off the training room lamp.

Natsu traveled with Izumi to the Sabaody Archipelago, where they casually shopped while the World Government scrambled to respond to his arrival. The chapter left Sengoku alarmed by Natsu’s unexpected presence near Mary Geoise, with no conflict yet reported.

• Natsu used the Flying Thunder God technique to take Izumi from Origin Island to the Sabaody Archipelago, and they browsed the shopping district together.
• A CP intelligence officer recognized Natsu on a surveillance image and reported his presence on Grove Three.
• CP0 ordered Saint Charlos’s ship to leave Sabaody immediately and told agents to evacuate Celestial Dragons and related assets from the island.
• Natsu ignored the withdrawing CP agents and shared grilled coconut candy with Izumi as they enjoyed the afternoon.
• Sengoku received the urgent report at New Marineford and realized Natsu had appeared near Mary Geoise after months of seclusion.

Sengoku and the Five Elders prepared for Uchiha Natsu’s arrival in Sabaody, wary of provoking the boy after his devastating power at the Summit War. The Five Elders ordered Saint Figarland Garling to send God's Knights to watch him, and Garling angrily challenged them over the risk of losing another subordinate.

• Tsuru told Sengoku she had alerted Borsalino, Sakazuki, and Kuzan, and advised avoiding any provocation while hoping Uchiha Natsu left Sabaody on his own.
• Sengoku ordered Cipher Pol teams to keep their distance and directed Kizaru to wait outside the archipelago, engaging only to protect civilian evacuations if attacked first.
• The Five Elders reviewed reports that Cipher Pol and the Marines could not effectively deter Uchiha Natsu, then agreed to send God's Knights to observe him secretly.
• Saint Figarland Garling erupted in anger over the order, recalling that Gunko had died the last time the Five Elders borrowed one of his subordinates.
• The long-bearded Elder argued that God's Knights were the only force capable of approaching Uchiha Natsu and returning intelligence, and insisted the mission was necessary.

Natsu and Izumi enjoyed a four-day vacation on Sabaody while Cipher Pol and the God's Knights watched from a distance under orders not to engage. They departed by submarine for Fish-Man Island, where Neptune awaited them with a formal welcome.

• Saint Green agreed to send God's Knights to surveil Natsu, warning them to withdraw if he showed signs of acting up and refusing future Uchiha missions if they lost anyone.
• Natsu and Izumi spent several peaceful days sightseeing and shopping on Sabaody while Cipher Pol kept its distance and the God's Knights secretly monitored them.
• Natsu promised Izumi he would set aside a day each week to spend with her when they returned home.
• Natsu gave Izumi the deep-blue and dark-gold ribbons he had secretly bought, and she told him she liked them as their submarine descended toward Fish-Man Island.
• Neptune prepared a formal reception at Fish-Man Island's harbor and waited for Natsu and Izumi to arrive.

Uchiha Natsu and Izumi arrived at Fish-Man Island, where Neptune and the people of Ryugu Palace welcomed them with deep gratitude for the protection that had kept the island safe. During a banquet, Natsu credited Whitebeard, the protection treaty, and the guards for the peace, while Izumi teased him for repeatedly cutting off Neptune’s thanks.

• Natsu and Izumi emerged from a submarine at Fish-Man Island and were greeted by Neptune, the three princes, and hundreds of guards.
• Neptune and the guards bowed to Natsu, thanking the Uchiha Clan for protecting Fish-Man Island during the past six months.
• Natsu told Neptune not to be formal and said he had come at Whitebeard’s request to visit the island.
• Neptune led Natsu and Izumi to a banquet at Ryugu Palace, where he toasted Natsu for bringing peace to the surrounding waters.
• Natsu credited Whitebeard and the work of the guards for the island’s security, while Izumi joked that his modest replies were leaving Neptune unable to finish his speeches.

At Neptune’s banquet, Natsu praised the king’s work and learned that Queen Otohime’s youngest son had brought Izumi a gift. When Natsu sensed pirates capturing civilians near Port Two, he went alone to stop them, leaving the chapter with a mermaid mother and her infant in danger.

• Natsu praised Neptune’s management of Fish-Man Island, and Neptune thanked him on behalf of his people.
• The youngest prince gave Izumi Queen Otohime’s deep-sea pearl powder, and Izumi comforted him by saying his mother must have loved him.
• Natsu sensed pirates capturing fish-men near the warehouse district at Port Two and told Neptune he would investigate alone.
• Natsu left the banquet hall despite Neptune and the royal guard preparing to respond, while Izumi calmly wished him a quick return.
• Pirates attacked civilians and used Seastone-embedded ropes to capture a fish-man, then grabbed his mermaid wife and sent their infant tumbling onto the pavement.

Natsu confronted pirates abducting Fish-Men and mermaids on Fish-Man Island, which had been under the Uchiha Gunbai flag for a year. After killing their scar-faced leader, he revealed his identity and sent the pirates fleeing.

• Pirates captured mermaids and surrounded young Fish-Man fishermen, planning to gather a hundred slaves before dawn.
• The scar-faced pirate mocked Natsu when he appeared and threatened to sell him to Mary Geoise.
• Natsu used his power to force the scar-faced pirate to stab himself in the throat.
• The pirates recognized Natsu as Uchiha, the Godslayer with a fifteen-billion-Beli bounty, and fled in panic.

Natsu slaughtered nearly a hundred pirates in the Number Two Port warehouse district with Wood Release, leaving their bodies trapped in a spreading thorn forest. Fukaboshi and the Ryugu Palace Guard Corps arrived afterward and began clearing the scene cautiously.

• Natsu used Wood Release: Cutting Technique to impale and drain nearly a hundred fleeing pirates, turning the warehouse district into a thorn forest.
• Natsu left the scene after deciding the island needed to learn who ruled the deep seas.
• Fukaboshi led the Ryugu Palace Guard Corps to the warehouse district and found the pirate corpses suspended among wooden spikes.
• Fukaboshi ordered the guards to count and remove the bodies while handling the wooden spikes carefully.

After rescuing Fish-Man Island civilians, Natsu ordered his Wood Clones to hunt unregistered pirates and imposed registration rules on vessels entering or leaving the island. He returned to the banquet, then toured Ryugu Palace with Izumi and Neptune, ending beside Izumi at the palace’s highest observation deck.

• The surviving civilians thanked Natsu for saving them from the pirates.
• Natsu created dozens of Wood Clones and ordered them to kill every unregistered pirate who entered Fish-Man Island over the next month.
• Natsu told the Night Owl Guards to have Fukaboshi and the others clear the harbor warehouse bodies and require all vessels to register with Ryugu Palace.
• Natsu returned to the banquet and shared food with Izumi while Neptune resumed speaking with the three princes.
• After the banquet, Neptune showed Natsu and Izumi Mermaid Bay’s Coral Corridor and Ryugu Palace’s plaza, where Izumi bowed to the Sea God statue and persuaded Natsu to bow too.
• Neptune led them to the highest observation deck, where Izumi took Natsu’s hand as they stood together overlooking Fish-Man Island.

Natsu and Izumi learned that Vander Decken IX had been targeting Shirahoshi with weapons guided by the Mark-Mark Fruit, so Natsu sent a Wood Clone to find him and promised to stop the attacks. They went with Neptune to visit Shirahoshi in the scarred Hard-Shell Tower, where they found her huddled behind curtains.

• A sword flew toward Ryugu Palace, and Natsu identified Shirahoshi as its target.
• Neptune explained that Vander Decken IX had marked Shirahoshi and had been attacking the Hard-Shell Tower for years.
• Natsu left a Flying Thunder God Kunai with Neptune and sent a Wood Clone to trace the sword's path and locate Vander Decken IX.
• Natsu told Izumi he would deal with Vander Decken IX himself, then took her to meet Shirahoshi.
• Neptune led Natsu and Izumi into the Hard-Shell Tower, where Shirahoshi was huddled on her bed behind gauzy curtains.

Natsu used Sealing Jutsu to remove Vander Decken IX’s Mark-Mark Fruit tracking mark from Shirahoshi, freeing her from Hard-Shell Tower. With the sealed mark as a clue, he prepared to pursue Vander Decken IX, who discovered that his connection to Shirahoshi had vanished.

• Izumi reassured Shirahoshi that Natsu had dealt with the pirates and that they might be able to remove the mark troubling her.
• Natsu identified the Mark-Mark Fruit’s tracking mark inside Shirahoshi and promised to free her from it.
• Natsu used Sealing Jutsu to detach the mark from Shirahoshi’s life force and seal it inside a talisman.
• Shirahoshi felt the mark’s restraint disappear, and Neptune embraced her as Natsu said it was time to deal with the remaining threat.
• At his shipwreck lair, Vander Decken IX discovered that he could no longer sense the mark on Shirahoshi.

Natsu tracked Vander Decken IX to the Shipwreck Graveyard after removing his Mark-Mark Devil Fruit mark, then confronted him aboard his wreck. The chapter ended as Natsu summoned Susanoo, overwhelming Vander Decken IX’s lackeys with its power.

• Vander Decken IX flew into a rage when he discovered that his mark on Shirahoshi had disappeared.
• Natsu used the sealed mark’s lingering energy to locate Vander Decken IX at the Shipwreck Graveyard, about forty nautical miles from Fish-Man Island.
• Natsu left Izumi with Shirahoshi and used the Flying Thunder God Technique to reach the wreck.
• Natsu confronted Vander Decken IX and revealed that he had removed the mark.
• Natsu dismissed Vander Decken IX as an ant and summoned a dark golden Susanoo, terrifying the pirates on the deck.

Natsu killed Vander Decken IX, freeing Shirahoshi from the mark that had kept her confined to the Hard-Shell Tower. After spending several days on Fish-Man Island with Izumi, he planned a permanent Heavenly Star Guard outpost, while a Wood Clone slaughtered a pirate crew attempting to take slaves.

• Natsu shattered the seal tied to Vander Decken IX and killed him with Susanoo's slash, then left the surviving lackeys to his Wood Clones.
• Natsu returned to Shirahoshi and told her the mark had been removed and she could leave the Hard-Shell Tower.
• Izumi led Shirahoshi outside, where Neptune and her three brothers welcomed her as she saw the world beyond the tower for the first time in years.
• Natsu and Izumi explored Fish-Man Island together, and Natsu said he would discuss establishing a permanent Heavenly Star Guard outpost with Neptune.
• A pirate crew that had come to Fish-Man Island to capture slaves was slaughtered by Natsu's Wood Clone at a cargo port.