Giyu advanced rapidly after surviving Final Selection, defeating demons alongside Sabito and then alone, including Lower Rank One Tetsusai. After recovering from his grievous injuries, he learned that Tsutako’s haori had been too damaged to wear.
Giyu became the Water Hashira and rushed to Crimson Sakura Village, where he saved Gyomei, Kanae, and Shinobu from four Lower Ranks. After the sisters’ parents died, Giyu brought them to Urokodaki to begin training, then left for a Hashira meeting as they promised to keep improving.
Giyu and Shinjuro confronted Kokushibo on Hachijōjima, where Giyu survived a desperate battle and awakened a new power. After returning to Mount Sagiri, Giyu helped Shinobu and Kanae train before they left to study Flower Breathing.
Giyu and Sabito encountered Tamayo and Yushiro in Asakusa, then brought them to Mount Sagiri to cooperate with the Demon Slayer Corps against Muzan. As Kagaya agreed to protect their research, Murata’s squad struggled to survive an attack by demon-controlled beasts.
Giyu rescued Masachika and Murata, then reunited with Kanae and Shinobu after their successful Final Selection and helped them pursue new ways to fight demons. The sisters grew closer to Giyu as they visited the Swordsmith Village, while Muzan’s new Upper Rank began a secret plan and Tamayo sought a way to preserve Giyu’s blood.
The Demon Slayer Corps captured Yaoshi after he found the Blue Spider Lily and gained the ability to survive sunlight, then prepared to defend Mount Sagiri from Muzan’s forces. The arc ended as Sanemi, Kumeno, and Obanai encountered an old demon whose death revealed something bizarre.
Sanemi, Obanai, and Giyu fought the demons Muzan sent to Mount Sagiri while the Hashira and their allies struggled against the Upper Ranks. The arc ended with Yaoshi transformed into a stronger monster and Sabito experiencing a strange new surge of power.
Sabito and the Demon Slayers turned back Muzan’s assault on Mount Sagiri, with Giyu saving Sakonji Urokodaki through Sun Breathing and forcing the demons to retreat. During the recovery that followed, Kanae and Shinobu grew closer to Giyu, and Kanae was promoted to Flower Hashira before Kagaya summoned Giyu privately.
Giyu trained with the Kamado family to master the Hinokami Kagura, then returned to Kanae and joined her on a mission to kill Doma. After defeating Doma, Giyu sent Kanae to safety and waited alone for Muzan.
Muzan transformed Tanjiro into a sun-resistant demon, but Giyu exhausted him and Tamayo’s medicine restored his human form. At the Hashira Meeting, Giyu withdrew his protection and let Sanemi attack Tanjiro to provoke the demon within him, ending with Tanjiro beheaded and the world falling still.
After Demon Tanjiro overwhelmed the Hashira, Giyu defeated him and persuaded the Corps to accept him as a human swordsman in training. Tanjiro reunited with his family at Mount Sagiri, where Urokodaki began his brutal training.
Tanjiro trained to master Sun Breathing while Giyu, Shinobu, and Obanai investigated disappearances in Nara Prefecture and fought two demons. Obanai survived the quarry battle, and Tanjiro faced Urokodaki’s final test as Final Selection approached.
Tanjiro survived Final Selection by defeating Rui with Heat Haze, while the Hashira tested the other candidates and Muzan learned of Tanjiro’s power. The arc ended with Shinobu revealing that Kanae had planned for her to marry Giyu alongside her.
Giyu and the Kocho sisters became a family before Giyu intercepted Muzan in Asakusa and drove him into the Infinity Castle. There, Giyu battled Muzan while Tanjiro fought Kokushibo, ending with both clashes still underway.