Arc 2The Fallen Team and Yin Release
After losing Mamoru Uehara, Katsuto, and Yui, Kōki joined the Anbu and resolved to grow strong enough to revive them. As the Third Shinobi World War began, he studied Yin Release, created a body-possessing clone from Kurama Some’s corpse, and gained Kushina’s help with sealing jutsu.
- Kōki used Wood Release to defeat the Sunagakure force, but Mamoru Uehara, Katsuto, and Yui died, leaving him determined to revive them.
- Minato brought Kōki back to Konoha, where Hiruzen learned of his Wood Release and arranged for him to join the Anbu while keeping his ability secret.
- Rasa began the war against Konoha, and Hiruzen ordered the village to prepare as Iwagakure considered joining the conflict and Madara continued watching Obito.
- Kōki traded his Superhuman Strength Technique to Yūhi Shinku for Genjutsu research and studied Yin Release with him.
- Kōki used Tobirama Senju’s records and Shinku’s research to create a Yin Release clone that possessed Kurama Some’s corpse and wielded his Five Senses Manipulation.
- Kōki tested the clone’s abilities, then sealed Some’s body away when Minato and Kushina visited and Kushina asked for his help with Wood Release.
- Kōki asked Kushina how to keep Yin Release chakra from dissipating, and she gave him a sealing jutsu scroll and offered to answer future questions.