Who was Haruko Kuchiki?
She was the eldest daughter of one of the Four Great Noble Houses of the Seireitei.
For thousands of years, because nearly all Soul Reapers in Soul Society lived in the Seireitei, its residents had constantly been subjected to the pressure of powerful spiritual pressure.
As a result, there were no ordinary souls in the Seireitei at all.
To prevent the Soul Reapers' powerful spiritual pressure from harming the residents of the Rukon District, the Seireitei's outer walls were built entirely from Killer Stone, which could absorb spiritual pressure. An enormous barrier—the Soul-Shield Membrane—also enveloped the entire Seireitei to prevent spiritual pressure from spreading into the Rukon District beyond it.
Anyone born in the Seireitei naturally possessed spiritual pressure and could safely survive under the oppression of powerful spiritual pressure.
Naturally, Haruko Kuchiki was no exception.
Otherwise, she would not have lived until now without experiencing any discomfort.
Now that Haruko Kuchiki was showing signs of soul dissipation, there was only one possibility.
Living for years with someone who possessed powerful spiritual pressure had oppressed her soul, causing it to weaken under pressure it could not withstand.
And that "powerful spiritual pressure" had to surpass Captain-level spiritual pressure to weaken the soul of someone who possessed spiritual pressure but was not particularly strong.
Who was Haruko Kuchiki closest to?
Ailin!
It was only after Haruko Kuchiki married Ailin that her soul dissipation began.
That made it obvious who this person with "powerful spiritual pressure" was.
Shihoin Yoruichi and Urahara Kisuke were both shocked.
If Ailin had not needed Urahara Kisuke's help and told him about Haruko Kuchiki's condition, no one would have known that Ailin had grown to such a level.
Even with Urahara Kisuke and Shihoin Yoruichi's confidence in themselves, they would need at least