Arc 17Rescue and the Shiba Clan
Shiraishi and Nemu helped free Kūkaku from prison, and Shiraishi escaped the Seireitei with her. After learning that Munemasa planned to seize the Shiba Clan’s spiritual tool and abduct Ganju, Shiraishi and Kūkaku returned to the clan headquarters and confronted him, where his stolen Zanpakuto powers turned the fight against them.
- Nemu decided to help Shiraishi rescue Kūkaku, and they entered the Seireitei hidden in an Ōmaeda Gem Company convoy.
- Shiraishi broke into Shin'ō Underground Great: The Jail, freed Kūkaku, and escaped with her after defeating Okita Sōji and fighting off Sajin Komamura.
- Mayuri asked Unohana to continue treating Nemu, while Oda Nobunaga died breaking Muken’s seal and releasing six prisoners.
- Shiraishi and Kūkaku escaped through Hakutōmon with Sōya Azashiro’s help, and Yamamoto later warned the captains that Munemasa might target Ganju to force Kūkaku to use the Shiba Clan’s spiritual tool.
- Nemu escaped the General Infirmary to warn Shiraishi and Kūkaku that Munemasa planned to abduct Ganju, but Kūkaku refused to flee and returned with Shiraishi to the Shiba Clan headquarters.
- Kūkaku reunited with Ganju, then confronted Munemasa after he killed the Shinigami watching over them.
- Kūkaku fought Munemasa until Shiraishi arrived, broke through his Dankū, and trapped him in a tornado with Infinity.
- Munemasa used Fox Nightmare to control and materialize Zanpakuto, and Shiraishi and Kūkaku fought Senbonzakura and Infinity as Munemasa trapped Kūkaku and blades closed around Shiraishi.