"Are they really father and daughter?" Roman covered his face, then patted his cheeks. "Since you've made up your mind, I should properly plan this out for your sake. It's a habit from my days as Chaldea's commander. You remember the concept of Lostbelts I mentioned before, right?"
A Lostbelt was a parallel world hostile to Pan-Human History. Due to its unique nature, as long as it survived, it posed a threat to Pan-Human History.
That was also why Roman had been prepared to simply destroy this world.
"Lostbelts... yeah, I remember. I'm curious, though. If this world were truly preserved, what effect would it have on Pan-Human History?"
"That's exactly what I want to talk about." Roman nodded. "Generally speaking, Lostbelts are incorrect branches. The sooner they die, the better it is for Pan-Human History. But that's only the usual case."
Where there was a usual case, there were naturally exceptions.
"A Lostbelt can potentially be reintegrated into Pan-Human History. As long as it hasn't diverged too severely, and as long as what you do aligns with the Counter Guardian's will, it may even be possible to designate the restoration of the Lostbelt as an official compilation matter."
Shirou stared at him in shock.
That was possible?
And official compilation matters could actually be decided by people themselves?
"There's precedent for it." To support his claim, Roman gave an example. "That country across the sea was originally doomed, but someone defied fate and completely swept away all the gods within his own nation. The gods vanished from that continent, and only then was that country permitted to exist by this world. It even became an official compilation matter."
"That's..." Shirou sucked in a breath, but quickly realized something. "Then, if this world's Greater Source recovered, wouldn't that mean...?"
"Yes,