Chapter Summaries

Riezel tested Hermit, his newly forged Nichirin Blade, and discovered that its immense heat and compatibility with Sun Breathing made it a powerful weapon. He found that Sun Breathing conflicted with body-enhancing magic, while Wind Breathing strengthened Wind Spirit Sprint, so he planned separate combat styles for Hermit and Fool.

• Riezel found that Hermit was exceptionally heavy and hot, and its blade burned through an iron block.
• Riezel tested Hermit in the forest, where his black Nichirin Blade unleashed a powerful blaze that he extinguished with Decomposition Magic.
• Riezel discovered that Sun Breathing prevented him from using magic that enhanced or acted directly on his body.
• Riezel found that Wind Breathing strengthened Wind Spirit Sprint and reduced its physical burden.
• Riezel planned to fight with Hermit and Sun Breathing for power, or Fool with Wind Breathing and enhancement magic for speed.
• Riezel marked Fool for Summoning Magic and decided to make a heat-resistant sheath for Hermit.

Shinobu Kocho reported that Tsugikuni Yoriichi had completed his training, and Ubuyashiki Kagaya declared that the Demon Slayer Corps would kill Kibutsuji Muzan in their generation. After Gyokko and Hantengu discovered the Corps headquarters, Muzan ordered them to wait for Daki so the three Upper Ranks could attack together.

• Shinobu Kocho told Ubuyashiki Kagaya that Tsugikuni Yoriichi's training was complete and that he could fulfill Kagaya's hopes.
• Ubuyashiki Kagaya vowed that the Demon Slayer Corps would kill Kibutsuji Muzan and end the Ubuyashiki Clan's shame in their generation.
• Gyokko ambushed Kakushi carrying supplies near the headquarters, while Hantengu joined him in discovering the Demon Slayer Corps' location.
• Kibutsuji Muzan ordered Hantengu and Gyokko to wait for Daki and attack the Ubuyashiki stronghold together.
• Hantengu told Gyokko that Daki would come to support them, and Gyokko prepared to make new works before the attack.

Riezel finished forging a heat-resistant scabbard for the Hermit and reflected that he had nearly exhausted his opportunities for growth in this world. Tamayo and Yushiro found him near the Demon Slayer Corps Headquarters, and Tamayo revealed she had personally witnessed Tsugikuni Yoriichi nearly kill Kibutsuji Muzan.

• Riezel forged a black scabbard from refined resin and high-density iron, then sheathed the Hermit in it.
• Riezel considered his completed Breathing Technique evolution and doubted that the Demon King could provide the Great Achievement he needed to Level Up.
• Tamayo and Yushiro appeared before Riezel using an illusion, and Riezel recognized them as demons.
• Tamayo explained that Tanjiro had told her about Riezel and that she sought someone capable of opposing the Demon King.
• Tamayo told Riezel that she had met Tsugikuni Yoriichi and witnessed him cut down Kibutsuji Muzan and nearly kill him.

Tamayo explained why Tsugikuni Yoriichi’s defeat of Kibutsuji Muzan had shaped her hatred and gave her hope that Riezel might finish his mission. She revealed that Akaza might have survived the Infinite Train incident, but a sudden boom interrupted her warning.

• Tamayo recounted how Tsugikuni Yoriichi nearly killed Kibutsuji Muzan and entrusted her with helping humanity defeat him.
• Tamayo told Riezel that his unremarkable presence reminded her of Tsugikuni Yoriichi and that she hoped he could kill Kibutsuji Muzan.
• Riezel said Tsugikuni Yoriichi had given him a gift and a request, telling him, “I’ll leave it to you.”
• Tamayo revealed she suspected Akaza had survived because his body could not have turned to ash within the time Tanjiro described.
• A tremendous boom suddenly rang out as Tamayo spoke.

Tamayo warned Riezel that Kibutsuji Muzan would react to the return of Tsugikuni Yoriichi’s name, and Riezel raced toward the Demon Slayer Corps Headquarters after demons attacked the town. Shinobu Kocho encountered a demon beneath the moon, while Riezel was still on his way.

• Tamayo explained that Kibutsuji Muzan would seek out the person claiming to be Tsugikuni Yoriichi and warned that Upper Rank Demons might attack the town.
• After a crash sounded from town, Riezel unleashed his fiery power and launched himself toward it, leaving Tamayo and Yushiro stunned.
• Hantengu and Gyokko prepared their assault, with Hantengu heading toward town and Gyokko planning to target Demon Hunters or the Ubuyashiki Family.
• Shinobu Kocho left the Ubuyashiki Family estate and walked toward the Butterfly Mansion, feeling uneasy beneath the full moon.
• A demon appeared in front of Shinobu Kocho and asked if she wanted to become its food, and Shinobu responded with a fake smile.

Daki confronted Shinobu Kocho as Gyokko unleashed aquatic demons on the town, while Ubuyashiki Kagaya ordered an evacuation and Rengoku Kyojuro rushed to protect him. Rengoku encountered Hantengu on the way and cut off his head.

• Daki revealed herself as Upper Rank Six and threatened to eat Shinobu Kocho, who drew her Nichirin Blade and prepared to fight.
• Gyokko sent malformed aquatic demons from pots throughout the town, and they attacked residents and Demon Slayer Corps swordsmen.
• Ubuyashiki Kagaya learned that demons had attacked and ordered Amane and the corps members to evacuate the town's residents along prepared routes.
• Rengoku Kyojuro raced toward the Ubuyashiki Family estate to check on Ubuyashiki Kagaya, despite hearing civilians in danger.
• Hantengu emerged from a corner and asked where Tsugikuni Yoriichi was, so Rengoku Kyojuro charged and severed his head.

Shinobu Kocho poisoned Daki, but Daki’s brother emerged and revealed himself as the true Upper Rank Six. At the Ubuyashiki estate, Gyokko confronted Ubuyashiki Kagaya and asked about Tsugikuni Yoriichi, only for Kagaya to say that Yoriichi was already there.

• Shinobu Kocho fought Daki with Insect Breathing and mocked her apparent weakness as Upper Rank Six.
• Shinobu Kocho revealed that her blade had poisoned Daki with wisteria toxin and left her to suffer.
• Daki called for her brother, who burst out of her back and warned Shinobu Kocho to stop bullying his little sister.
• Gyokko appeared before Ubuyashiki Kagaya and said he intended to kill him unless Kagaya revealed where Tsugikuni Yoriichi was.
• Ubuyashiki Kagaya calmly told Gyokko that Tsugikuni Yoriichi was already there.

Riezel arrived at the Ubuyashiki residence and fought Upper Rank Five Gyokko, whose Blood Demon Arts were overwhelmed by Riezel’s evolved Sun Breathing. Ubuyashiki Kagaya watched the battle and concluded that Riezel’s power could defeat Kibutsuji Muzan.

• Riezel descended into the courtyard in a blast of flame, while Ubuyashiki Kagaya remained unharmed and welcomed him.
• Gyokko emerged and attacked Riezel with Thousand Needles: Fish Kill, but Riezel’s heat melted the needles before they could reach him.
• Gyokko unleashed Ten Thousand Slippery Fish, but Riezel used Sun Breathing, Sixth Form: Scorching Bone Flame Sun to destroy them without being poisoned.
• Riezel’s flaming slash struck Gyokko and destroyed the courtyard wall, ground, bridge, and stream in a crimson blast.
• Ubuyashiki Kagaya recognized Riezel’s power as an evolved Sun Breathing technique and believed Kibutsuji Muzan’s defeat had finally come.

Riezel and Ubuyashiki Kagaya faced Upper Rank Four’s four clones after the wounded Rengoku Kyojuro crashed into the estate. Kyojuro warned them that beheading Hantengu had caused him to split into clones, while Riezel continued watching the sky for the threat still to come.

• Riezel landed in Ubuyashiki Kagaya’s ruined courtyard with his powerful black Nichirin Blade and said the danger was not over.
• Rengoku Kyojuro fell into the estate badly wounded, relieved to see Ubuyashiki Kagaya unharmed.
• The Staff Demon, Fan Demon, Half-Bird Demon, and Cross Spear Demon arrived and revealed themselves as Upper Rank Four clones.
• Kyojuro warned that the Demons were clones, then the story returned to his earlier encounter with Hantengu.
• Kyojuro beheaded Hantengu, but Hantengu regenerated and split into the Fan Demon and Staff Demon.
• Kyojuro cut the two Demons apart, causing them to produce the Half-Bird Demon and Cross Spear Demon.

Riezel faced the arrival of several Upper Rank demons after Rengoku Kyojuro and Shinobu Kocho were defeated. With Gyutaro, Daki, Hantengu’s clones, and the wounded Gyokko gathered in the courtyard, Riezel prepared to fight them.

• Rengoku Kyojuro was overwhelmed by Hantengu’s four clones, whose attacks sent him crashing into the Ubuyashiki estate’s courtyard.
• Shinobu Kocho was thrown into the courtyard badly wounded, while Daki and Gyutaro landed beside her.
• Hantengu’s clones mocked Daki and welcomed Gyutaro, then Urogi brought the injured Gyokko out of his pot.
• Gyokko warned the demons that Tsugikuni Yoriichi had cut through his scales and inflicted wounds that would not regenerate.
• Rengoku Kyojuro and Shinobu Kocho looked to Riezel as he calmly acknowledged the three Upper Ranks and said he would deal with them first.

Riezel faced seven Upper Rank Demons who mocked his claim that he could defeat them, then unleashed Sun Breathing’s Eleventh Form. The chapter ended with all seven demons’ heads severed by his Halo Dragon Head Dance.

• The Upper Rank Demons mocked Riezel and argued that their regenerative abilities and numbers would let them outlast him.
• Rengoku Kyojuro prepared to fight beside Riezel, while Shinobu Kocho struggled to rise and Ubuyashiki Kagaya watched.
• Daki attacked first, and Gyutaro, the four clone demons, and Gyokko joined in with their Blood Demon Arts.
• The demons’ combined assault devastated the Ubuyashiki estate, forcing Rengoku to shield Ubuyashiki Kagaya and blowing Shinobu away.
• Riezel emerged from the barrage with a fiery Sun Breathing technique, named Halo Dragon Head Dance, and severed the seven demons’ heads.

Riezel annihilated the Upper Rank Demons attacking the Demon Slayer Corps Headquarters with a single Sun Breathing strike, leaving the Hashira and Ubuyashiki Kagaya stunned. Hantengu’s hidden true body escaped the battle and fled in terror.

• Riezel beheaded Gyutaro, Daki, Gyokko, and the four demon clones with his Eleventh Form, while his blade and abilities prevented them from regenerating.
• Ubuyashiki Kagaya and Rengoku Kyojuro realized the Upper Ranks were dying, and Shinobu Kocho watched Riezel in shock.
• Daki, Gyutaro, Gyokko, and the demon clones crumbled to ash; Riezel warned that one demon had escaped.
• Hantengu’s hidden true body emerged near a town and fled in fear after surviving Riezel’s search.

After the Upper Ranks’ attack devastated the town, the Hashira gathered around Ubuyashiki Kagaya, learned how badly the demons had outmatched them, and heard that Riezel was staying with the gravely injured Shinobu Kocho. The Corps prepared to relocate its exposed headquarters while Riezel tried to help Shinobu recover.

• The Hashira returned to the damaged town, questioned Rengoku Kyojuro over failing to protect Ubuyashiki Kagaya, and accepted Kagaya’s defense of him.
• The Hashira urged Ubuyashiki Kagaya to assign more guards, but he refused to waste their strength and instead ordered the Corps to relocate its exposed headquarters.
• Rengoku Kyojuro reported that the wounded and dead had been accounted for, civilians were being evacuated, and Shinobu Kocho remained unconscious with severe injuries.
• The Hashira discussed Rengoku Kyojuro and Shinobu Kocho’s defeats and learned that even the lowest-ranked Upper Rank could overpower a Hashira fighting alone.
• Rengoku Kyojuro told the Hashira that Riezel was with Shinobu Kocho and believed he could help her recover quickly.

Riezel visited the Butterfly Mansion and used powerful healing magic to restore Shinobu Kocho from her severe injuries. When she woke after one night, Shinobu confronted him about how he had healed her, while Riezel denied doing anything.

• Riezel found the Butterfly Mansion overwhelmed with injured people and went to Shinobu Kocho's room.
• Riezel cast Dia Flatol, healing Shinobu Kocho's wounds and fever in seconds.
• Shinobu Kocho held Riezel's hand in her sleep, murmured about her Big Sister, and woke beside him.
• Shinobu asked Riezel to take responsibility, then learned she had slept only one night and felt fully recovered.
• Shinobu accused Riezel of healing her and pressed him to explain his abilities.

Shinobu Kocho recovered after Riezel healed her, and she joined him at the Demon Slayer Corps meeting. With the headquarters exposed, Ubuyashiki Kagaya announced a relocation to Swordsmith Village and asked Riezel to reconsider joining the Corps.

• Riezel admitted he had healed Shinobu, then denied that she had said anything while unconscious before leaving her room.
• A Kasugai Crow summoned Riezel to a meeting, and Shinobu insisted on accompanying him despite her recent injuries.
• Shinobu and Riezel arrived at the headquarters, where the Hashira welcomed Shinobu and acknowledged Riezel's victories over Upper Rank Demons.
• Ubuyashiki Kagaya announced that the Corps and nearby families would abandon the exposed headquarters and temporarily move to Swordsmith Village.
• Ubuyashiki Kagaya asked Riezel whether he would join the Demon Slayer Corps.

Ubuyashiki Kagaya invited Riezel to join the Demon Slayer Corps and pursue Kibutsuji Muzan, but Riezel warned that his presence could bring a greater danger. He revealed that Muzan would come for him personally because Riezel possessed something Muzan wanted.

• Ubuyashiki Kagaya invited Riezel to join the Demon Slayer Corps so they could search for Kibutsuji Muzan and end the threat of demons.
• Riezel warned the Hashira that his arrival had exposed the headquarters and that demons might attack again.
• The Hashira welcomed the prospect of fighting demons, but Riezel unsettled them by asking how they would respond if Kibutsuji Muzan himself came for him.
• Tamayo warned Riezel that Muzan might hide for decades after witnessing him kill three Upper Ranks, just as he had avoided Tsugikuni Yoriichi.
• Riezel assured Tamayo that Muzan would not hide because Riezel had something he wanted.

Riezel told the Demon Slayer Corps that Kibutsuji Muzan would seek him out after hearing that Riezel possessed the Blue Spider Lily, prompting the Hashira to react with excitement and anger. He warned them that they could not defeat Muzan without greater power, then explained the Demon Slayer Mark, Crimson Blade, and Clear World.

• Riezel revealed that Kibutsuji Muzan had spent a thousand years searching for the Blue Spider Lily to complete the medicine that made him a demon, and said he had told Gyokko that the flower was in his possession.
• Riezel predicted that Kibutsuji Muzan would come looking for him, and the Hashira reacted with intense excitement while Ubuyashiki Kagaya coughed blood from the surge of emotion.
• Sanemi Shinazugawa demanded to know whether Muzan would come, but Riezel warned that the Demon Slayer Corps would be annihilated if they faced him unprepared.
• Ubuyashiki Kagaya stopped Sanemi Shinazugawa from confronting Riezel and reminded him that Riezel had saved the Ubuyashiki Clan and the Demon Slayer Corps.
• Obanai Iguro asked about the Demon Slayer Mark, Crimson Blade, and Clear World, and Riezel explained how the three abilities strengthened demon slayers and could let them challenge Upper Ranks.

Riezel explained the Demon Slayer Mark, Crimson Blade, and Clear World to the Hashira, warning them that the Mark shortened the user’s lifespan. The Hashira accepted the risk and agreed to learn the abilities as Ubuyashiki Kagaya appointed Tsugikuni Yoriichi Chief Instructor to prepare the Corps for its final battle against the demons.

• Ubuyashiki Kagaya shared the Ubuyashiki Clan’s records of the Demon Slayer Marks, and Riezel explained the three abilities and their effects.
• Riezel revealed that he had entered the Clear World but had not awakened the Demon Slayer Mark or Crimson Blade, and he warned that the Mark shortened its users’ lifespans.
• Riezel told the Hashira that mastering all three abilities could give them a chance against most Upper Rank Demons, though Upper Rank One remained far stronger.
• Obanai Iguro asked Riezel to teach them how to awaken the abilities, and the Hashira accepted the Mark’s deadly cost in order to fight the demons.
• Ubuyashiki Kagaya appointed Tsugikuni Yoriichi Chief Instructor, placing him above the Hashira and ordering everyone to follow his lead in preparing for the final battle.

Akaza, Doma, and Kokushibo were summoned to Infinity Castle, where Kibutsuji Muzan revealed that Gyokko and Gyutaro had died and blamed the demons for failing to find the Blue Spider Lily. Muzan gave them one final chance and announced that war was about to begin.

• Nakime summoned Akaza, Doma, and Kokushibo to Infinity Castle on Kibutsuji Muzan’s orders.
• Akaza rejected Doma’s familiar greeting and broke his arm, while Kokushibo stopped them from fighting.
• Nakime revealed that Kibutsuji Muzan had already arrived, and the demons knelt before him.
• Kibutsuji Muzan announced that Gyokko and Gyutaro were dead and condemned the demons for their incompetence in failing to find the Blue Spider Lily.
• Kibutsuji Muzan gave the demons one final chance and declared that war was about to begin.

Kibutsuji Muzan ordered the demons to prepare for war after hearing that the Blue Spider Lily was in Riezel’s possession. Kokushibo learned that the swordsman who nearly killed Akaza was called Tsugikuni Yoriichi and used Sun Breathing, leaving him shaken.

• Kibutsuji Muzan ordered Nakime to monitor Hantengu and the Demon Slayer Corps, and promised her Gyokko’s vacant Upper Rank Five position if she succeeded.
• Kibutsuji Muzan demanded that the Upper Ranks find potential demons and warned that failure would mean their disbandment and deaths.
• Doma asked Akaza whether the investigation into the swordsman who nearly killed him was connected to their current crisis.
• Kokushibo heard Akaza say Tsugikuni Yoriichi, beheaded Doma, and seized Akaza to demand an explanation.
• Akaza told Kokushibo that Tsugikuni Yoriichi had nearly killed him with Sun Breathing, and Kokushibo trembled at the revelation.