Jack listens to what Chiaki has to say very quietly, and it starts to make that kind of twisted sense that things do from back in his own world. Bringing other souls here, to repopulate Crystallis? The crystals, themselves, people were saying that they, the Heroes, were part of the Calamity? Or was that just Kalki messing with them?

"Problem. Because the Calamity hasn't arisen yet. Are you sure it isn't the other way around? Isn't that what Kalki was saying? The Heroes of Light are summoned. The Calamity arises. Because we bring the Calamity with us. If you believe what she was saying."