“But...”
Archaeology was this girl's reason for living. She was especially enthusiastic when it came to the Blue Knight. But revealing the truth about the Blue Knight would put his very existence in danger. It was a painful problem for the girl.
“You're telling me to run down the previously set rails of time?”
“Sadly... Bertorion and I can only ask you to do so. We'll leave the decision up to you however.”
Since Koutarou and Clan needed to return to their world, 20 years from now, they couldn't keep watch over the girl forever. That's why they didn't know what the girl would do, and all they could do was to plead with her.