Chapter 255: Yhwach vs Yamamoto
In Mayuri Kurotsuchi's view, Shinigami and Hollows were always considered the most opposing forces. After all, the primary duty of the Gotei 13 was to maintain the balance of the three worlds, and their main adversaries had always been the Hollows.
But…
Unexpectedly, in a recent series of experiments, whether it was a direct clash between a Shinigami and a Quincy or a combination of Shinigami and Quincy forces against Hollow energy, the results were always the same.
The Quincy’s power was the most incompatible with Hollow energy.
The Quincy’s power collapsed immediately upon contact with Hollow energy. For the Quincy, Hollow energy was like a deadly poison.
Mayuri recalled that Naruto once mentioned the unique nature of the Substitute Shinigami’s situation. Ichigo’s Zanpakutō was fundamentally tied to his inner Hollow’s power, similar to Kurama’s connection with Naruto.
So...
This explained why Ichigo Kurosaki’s Bankai couldn’t be stolen by the Quincies.
However, achieving this was not simple under normal circumstances. Typically, Quincy powers don’t merge with Hollow energy; they merely collide, but this doesn't cause an immediate collapse like "poisoning."