As the legitimate descendants of Sinful God Cain, each of the Forbidden Four Characters had their own mission.
Kageno Meiga had built an altar through every possible means so that the "Sacred Annihilation" could be recreated in the modern age.
Aoba had continuously nurtured a suitable shrine maiden so that the "Sacred Annihilation" could be used.
Yase had put down roots in the secular world and built his family into a great clan in order to provide financial, material, and other forms of support when necessary. Even before Kageno Island appeared, they had already been one of the world's major financial conglomerates, commanding numerous corporations and holding an exalted position.
Hido, meanwhile, had integrated himself into government institutions and become a person of power within the national bureaucracy.
Thus, Kageno Senra had ultimately built Kageno Island into a Demon Race Special Administrative Zone, while the other three families had also made enormous contributions.
Yase and Hido in particular. Without their efforts, Japan would never have agreed to Kageno Island's status as an affiliated territory, much less possessed the financial and material resources to build this Demon Race Special Administrative Zone.
As a result, Aoba had instead silently devoted herself to nurturing a shrine maiden, and it was only in this generation that Asagi, a qualified candidate, was successfully born.
Therefore, Asagi was the only suitable candidate ever discovered, past or present—a divine-level hacker capable of freely manipulating the five supercomputers on Kageno Island—the "Witch of Cain."
Thanks to this, Asagi had actually known nothing about the truth of the Aoba family before now. She had not known that she was a legitimate descendant of Sinful God Cain, much less that she was the only person capable of successfully activating the "Sacred Annihilation."
In the past, Asagi had entered Room "C"