No wonder Mash was so excited. To her, the starry expanse of the universe was something incredibly romantic. As a Homunculus, she had remained inside Chaldea ever since her birth. Let alone the cosmos, even the first blue skies and white clouds she had seen were within Singularities. That was why she longed so deeply for the outside world and the stars beyond it.
Of course, that was only one reason. There was another, more important reason for Mash's excitement: they would not have to fight, nor would they have to destroy this special domain. Mash had been somewhat abnormal in the Britain Lostbelt, not only because of her amnesia, but also because it was the one Lostbelt that did not need to be pruned. That was why she had wanted to protect it.
Though it was a Lostbelt, it was still a world. Pruning a Lostbelt meant destroying a world. Mash and Ritsuka might have been doing it to reclaim their own world, but destroying other worlds would undoubtedly leave them burdened with enormous guilt. Now that they had finally found a world they did not have to destroy themselves, naturally they wanted to protect it.
That was why, when it came to Koyanskaya's special domain, Mash was absolutely willing to help if they could avoid destroying it, even if no humans lived here. Her mind was much sharper than usual as well. Under normal circumstances, she would never have thought of needing a Mystic Code for breathing while flying through space.
"It's fine. After all, this really is exciting. This is the third path I proposed: temporarily freeze the space-time of your Reality Marble, then launch it into the universe. Of course, I'll weave a spell that automatically releases the space-time freeze once it reaches a safe location."