Inaba Kagerōza was the half-body that carried Yushima Oshu's memories.
As for the other half-body, Inaba Kagerōza feared that releasing it would cause it to resist their eventual fusion.
So, Inaba Kagerōza stored that other half-body within the Dangai, keeping it asleep all along.
Because Inaba Kagerōza was merely a half-body separated from Yushima Oshu, his spiritual pressure was completely different from Yushima Oshu's.
Relying on the memories in his mind, Inaba Kagerōza had secretly collected the spirit particles of every powerful Soul Reaper in the Seireitei over the past several centuries, using those particles to create Reikaku.
Naturally, to prevent his plan from being ruined before it was complete, he only collected the spirit particles after those Captains had used the Senkaimon to travel to the Human World and released their spiritual pressure.
For example, the spiritual pressure currently placed on the circular platform was residue left behind after Aizen Sosuke, Captain of the Fifth Division, had slain a mid-level Hollow in the Human World not long ago.
After all the Soul Reapers and academy students who had passed their assessments returned to the Seireitei, Inaba Kagerōza had gone to the Human World to collect it.
"Bzzzt, bzzzt..."
Arcs of lightning flickered within the experimental equipment.
The blue spiritual pressure inside the test tube on the platform had some substance extracted from it amid the lightning. It then passed through a series of pipes and reacted within one machine after another, eventually condensing into a small yellow pill on another lab table.
With the experiment complete, Inaba Kagerōza hunched over and approached the table. He sealed the small yellow pill inside a glass vial, then wrote a few words on it.
At a cultivation tank, Inaba Kagerōza manipulated something beneath it, and a drawer slid out from below.
After