: To save Masaki, Isshin Shiba (the 10th Division Captain) agreed to be bound to her soul using a special Gigai. This required him to permanently sacrifice his Shinigami powers to act as a counterweight to the Hollow essence within her.
Isshin reveals to Ichigo that Masaki should not have died during the encounter with the Hollow . 12 : Everything But The Rain June Truth
: Because she was infected by a Hollow, Yhwach deemed Masaki impure. Losing her powers mid-battle left her defenseless, leading to her death while protecting Ichigo. 3. Identity Revelations for Ichigo : To save Masaki, Isshin Shiba (the 10th
This report covers the events and revelations of the Bleach narrative arc " Everything But The Rain ," specifically focusing on the episode/chapter titled (Episode 12 of Thousand-Year Blood War / Manga Chapter 536). Executive Summary : Because she was infected by a Hollow,
The report concludes with Ichigo's realization of his true heritage:
Following her battle with the Hollow known as "White," Masaki suffered from "Hollowfication," a process that threatened to destroy her soul.