Arc 6The Zanpakuto Rebellion
Sylvan and Rain joined the Soul Reapers in resisting Muramasa’s rebellion and helped Ichigo reclaim Zangetsu. As Muramasa sought Jiku'a in the Twelfth Division, the Soul Reapers began confronting their own Zanpakuto and learned that recovering their Shikai depended on their Soul Pulses returning to normal.
- Sylvan and Rain reached the burning Seireitei, confronted Muramasa at Sōkyoku Hill, and escaped after Rain used Ittō Kasō, but they could not find Jiku'a.
- Unohana treated Sylvan and taught him to fight with his cane despite his weakened Reiatsu, while Sylvan explained Muramasa’s whispers and how Shimizu had reunited with Daku.
- Muramasa freed Sode no Shirayuki from Rukia’s control and extracted Zangetsu from Ichigo, who became Hollowfied after fighting his Zanpakuto.
- Sylvan and Rain entered Ichigo’s Inner World and helped him overcome White Ichigo, after which Ichigo defeated Zangetsu and regained his Zanpakuto.
- Muramasa and the Zanpakuto attacked Mayuri’s laboratory in search of Jiku'a, but Mayuri trapped Muramasa and questioned him about Kōga before Muramasa broke free using Hollow power.
- Ichigo and Sylvan told Kyōraku and Ukitake that each Soul Reaper needed to defeat and reclaim their own Zanpakuto, while the divisions mobilized to reinforce the Twelfth Division.
- Unohana awakened and drove off the Zanpakuto attacking the Twelfth Division, while Renji, Rangiku, Hisagi, and Hinamori encountered their own manifested Zanpakuto.
- Haineko wounded Rangiku and explained that her Shikai would remain unavailable until her Soul Pulse recovered, and Sylvan scattered Haineko’s ash, and Rain informed the Soul Reapers that their Shikai might return as their Soul Pulses normalized.