Honestly, the chapter flew by so fast. And it's true what they mention about White and Black Matter; thanks to Ao, Gourai knows what emotions are. As a consequence, if you feel joy, you’ll feel sadness, and the same goes for the counterpart of every emotion. Since Gourai has shared so much with the others, it's normal for her to feel all that tension now in the final chapters. I sincerely hope everything turns out well for all of them.