Arc 1The Returned Izuna
A cosplayer posing as Izuna returned to Konoha, where Madara and the others believed he came from another world and tried to protect him while he built a place in the clan. His proposals began reshaping Konoha, but he continued concealing that he was not the real Izuna as his bond with Madara deepened.
- Izuna returned to Konoha, proposed building a power plant, and told Madara that his unstable left eye had been cultivated from his cells by Tobirama.
- Madara, Hashirama, and Tobirama concluded that Izuna came from another world and agreed to preserve his belief in their shared history while seeking a way to send him home.
- Izuna tried to care for Madara, accidentally punched him through trees, and later used rhythm-game swordplay and an iron shovel to defeat Uchiha challengers.
- Madara protected Izuna from clan suspicion, while Tobirama examined his abnormal left eye and found Hashirama’s chakra fused into it.
- Izuna drafted a proposal for council-based Uchiha governance, and Madara and Hashirama decided to adapt its principles for Konoha and present it as their joint work.
- Izuna promoted Konoha with a street performance but froze when the crowd asked him to introduce himself, and Madara brought him home and promised to protect him.
- Izuna’s performance attracted mission requests and trade negotiations, while Hashirama and Tobirama examined him and found only interrupted chakra flow in his left eye.
- Izuna kept training and invented stories to explain his behavior, while Madara wondered how to reach Izuna’s original world and confront his counterpart.