If we move it somewhere else, it'll just move back - it's got plenty of teleport spells, and more than enough pages to power them. There's likely nothing we can do until the Book is finished. But there's nothing saying Hayate is lost the moment the Book's pages are filled... normally we'd have a fight on our hands first. During that fight is when our plan has to come together.

We only get one shot at this, and while the stakes aren't as high as they could be on a Bureau scale, well... I don't want to lose Hayate either. This case has been personal for me since they shot you down, and since I realized what we were dealing with. I've- we've come too far to just let them take her away from us now.