Recaps

Riezel helped Yuri escape the Basolo Family’s marriage scheme and traveled with her to Franzer Territory, where he learned magic and met the Franzer family. Yuri challenged Alderman to settle their dispute at the War Festival and defeated him in the mage match, with the final match still to come.

• Akil sneaked into the Franzer estate during an attack by collared slaves and masked Basolo fighters, but Riezel defeated the attackers and used Crimson Lotus Karmic Fire to burn the residence.
• Yuri feigned serious injuries to expose the Basolo Family’s scheme, then left the royal capital with Riezel and her companions for Franzer Territory.
• On the journey, Yuri taught Riezel magic, and he revealed unusual Hypothetical Control System magic that could decompose her spells.
• At the Franzer estate, Riezel defeated Isaac in a duel, while Yuri confronted Alderman over his marriage plans and agreed to settle their dispute through the War Festival.
• Yuri asked Riezel to serve as her trump card in the festival, while Alderman’s mysterious swordsman attendant drew Riezel’s attention.
• At the War Festival, Sephaz defeated Marilyn in the first match, then Yuri overwhelmed Alderman with magic and won the mage match.
• Yuri left Alderman collapsed after the announcer declared her the winner, with the unrestricted third match still pending.

After winning the War Festival, Riezel traveled to the world of Demon Slayer and helped Rengoku and the others defeat Enmu and Akaza. He arrived at Demon Slayer Corps Headquarters, where the Hashira gathered to question his victory and Sanemi challenged him to endure a strike.

• Riezel defeated Gil Dadis in the War Festival final, and the crowd recognized his strength as both a True Swordsman and Tactical Class Mage.
• Marquis Philip Charlor offered Riezel an audience with the king and a viscountcy, but Riezel and Yuri refused to return to the Royal Capital until the kingdom judged those responsible for the attacks.
• Yuri advised Riezel to become a Sword Saint, and Riezel used the Dimensional Cube to travel to the world of Demon Slayer: Kimetsu no Yaiba.
• After killing a man-eating demon, Riezel boarded the Mugen Train, met Rengoku Kyojuro, and joined Tanjiro, Zenitsu, and Inosuke as the train demon trapped passengers in dreams.
• Riezel dismantled the locomotive and erased Enmu, then took over the fight against Akaza and killed him with Sun Breathing: First Form, Dance.
• Riezel agreed to meet the Demon Slayer Corps Master, while Muzan reacted fearfully to the name Tsugikuni Yoriichi and summoned Hantengu and Gyokko to investigate him.
• Rengoku brought Riezel to Corps Headquarters, where the nine Hashira questioned his report, and Sanemi Shinazugawa demanded that Riezel take one strike from him.

Riezel mastered an evolved Sun Breathing, forged a new Nichirin Blade, and destroyed several Upper Rank Demons during their attack on the Corps. The Demon Slayer Corps prepared to relocate to Swordsmith Village, and Ubuyashiki Kagaya again asked Riezel to join.

• Riezel declined Ubuyashiki Kagaya’s invitation to join the Corps, studied the five foundational Breathing Techniques, and fused them with Sun Breathing and Akasha Continent sword skills.
• After months of training, Riezel mastered an evolved Sun Breathing and the Clear World, then reforged the Hermit's Sword into a powerful Nichirin Blade.
• Tamayo told Riezel that Tsugikuni Yoriichi had nearly killed Kibutsuji Muzan and hoped Riezel could finish the fight as demons attacked the town and headquarters.
• Riezel killed Gyokko, while Rengoku Kyojuro and Shinobu Kocho were badly wounded fighting Hantengu’s clones, Daki, and Gyutaro.
• Riezel used his Eleventh Form to behead seven Upper Rank demons and prevent them from regenerating, but Hantengu’s hidden true body escaped.
• The Hashira assessed the damage and casualties, while Riezel healed Shinobu Kocho at the Butterfly Mansion.
• Ubuyashiki Kagaya ordered the Corps to abandon its exposed headquarters and move temporarily to Swordsmith Village, then asked Riezel whether he would join.

Riezel joined the Demon Slayer Corps, trained the Hashira, helped Tanjiro restore Nezuko, and created a powerful puppet automaton. When Kibutsuji Muzan finally came for the Blue Spider Lily, Riezel fought him and was transported to the Infinity Castle while Muzan ordered the Corps destroyed.

• Ubuyashiki Kagaya invited Riezel to join the Corps, and Riezel warned the Hashira that Muzan would come for the Blue Spider Lily he claimed to possess.
• Riezel explained the Demon Slayer Mark, Crimson Blade, and Clear World, then Ubuyashiki Kagaya appointed Tsugikuni Yoriichi Chief Instructor.
• Muzan summoned the Upper Ranks, condemned their failures, and learned from Akaza that Tsugikuni Yoriichi had nearly killed him.
• Riezel led the Hashira through special training, helping them awaken their Marks and Crimson Blades while teaching them to pursue the Clear World.
• Riezel confirmed that Tanjiro’s Dance of the Fire God was Sun Breathing and used Decomposition Magic to restore Nezuko’s humanity.
• Riezel studied the ancient Puppet Craft book, built Type One, repaired Yoriichi Type Zero, and gave Tanjiro the hidden black blade found inside it.
• Ubuyashiki Kagaya warned Riezel that demons were preparing for battle and entrusted the Corps to him before losing consciousness.
• Muzan came for the Blue Spider Lily, but Riezel refused to hand it over and fought him alongside the Pillars before Nakime transported Riezel to the Infinity Castle.