"You say that you observed one person vanishing, just as another appeared?"

Mikoto looked between them, a glint of something in her eyes -- a tinge of emotion to her previously stoic demeanor. "I have not yet heard of such an occurrence... but if it is as you say, then there is perhaps the possibility that this is not limited to Gaia. It stands to reason, that those who vanish from Gaia, are going elsewhere... and that elsewhere just may be in replacement of those who are arriving here."

Why hadn't she thought of that before?