Arc 4The Zanpakuto Rebellion
Su Feng investigated disappearances in North Rukongai, oversaw Gin Ichimaru’s captain examination, and helped assess Mayuri Kurotsuchi’s suitability for Squad 12. After Su Feng defeated and imprisoned Mayuri, materialized Zanpakuto began fleeing across Soul Society, and Yamamoto called the captains together to investigate.
- Retsu Unohana brought Su Feng to the Women's Shinigami Association meeting, where she proposed Kendo ranks and approved him as vice president despite Byakuya Kuchiki’s objection.
- Su Feng and Nanao Ise investigated disappearances in North Rukongai, where Takehara Kazuhiro attacked them and revealed his allegiance to the Rebel Army.
- Su Feng killed Takehara Kazuhiro after he unleashed his Bankai, then reported the incident with Aizen and Nanao Ise to Yamamoto Genryusai.
- Su Feng oversaw Gin Ichimaru’s captain examination, and the captains later debated Mayuri Kurotsuchi’s suitability for Squad 12 before Yamamoto assigned Su Feng and Soi Fon to handle the case.
- Su Feng fought Byakuya Kuchiki in the Ninth Division dojo, defeated him across several disciplines, and agreed with Ginrei Kuchiki to keep challenging him to spur his growth.
- Su Feng and Soi Fon evaluated Mayuri’s research and Bankai, but Su Feng defeated Konjiki Ashisogi Jizo and arrested Mayuri for releasing it without authorization.
- Rangiku Matsumoto and Nanao Ise reported that Haineko had vanished, and captains reported that other materialized Zanpakuto had fled or rebelled.
- Yamamoto summoned the captains to an emergency meeting about the mass flight of materialized Zanpakuto and asked Captain Kuchiki to explain what had caused it.