The Reikaku uprising erupted and was quelled in less than half an hour.
The three captains remaining in the Seireitei—Byakuya Kuchiki, Rukia, and Mayuri Kurotsuchi—each encountered their own Reikaku.
In the end, worried that the other fake captains would come to surround them, Byakuya Kuchiki and Rukia each fled separately.
Only Mayuri Kurotsuchi, when facing his own Reikaku, used a small trick to dispose of it. He uncovered part of the Reikaku's secret and created disguised eyes for himself, allowing him to infiltrate the enemy.
What surprised Mayuri Kurotsuchi was that after infiltrating the Reikaku, he discovered that these fakes, which had replaced nearly every captain and Vice-Captain in the Gotei 13, were not trying to rule the Seireitei. Instead, they seemed to be searching for something.
The head of the Twelfth Division's Dangai Research Institute, who was highly suspicious, was not in Soul Society himself.
The Three Worlds: Hueco Mundo, the Human World, and Soul Society.
Judging from the methods used to create these Reikaku, the section chief named Inaba Kagerōza had not delved into research involving Hollow powers.
Therefore, Mayuri Kurotsuchi surmised that Inaba Kagerōza would not go to Hueco Mundo. He had most likely gone to the Human World.
Otherwise, Inaba Kagerōza would not have specifically controlled the Gokuto to create a time difference between Soul Society and the Human World.
This time, Rukia had come to the Human World not only to learn what had happened to the captains, but also to investigate what Inaba Kagerōza was searching for and what he intended to do with it.
If they learned those things, the Seireitei could launch a targeted counterattack to quell the unrest caused by Inaba Kagerōza.
Otherwise, with so many Captain-level fighters battling in the Seireitei at once, the Seireitei might be reduced to ruins