Even with her newfound powers, pinpointing an exact location was still quite hard for Chisato with the Chaotic Void disturbing her spatial senses. She would still need some time before she could master this.
But even though it was not perfect, Chisao was still able to perform teleportation in the void, which was actually a big deal. And now, she had also became capable of surviving in the chaotic void even without the support of Elena.
So while she was performing continuous teleportations to bring both herself and Elena to the city, Chisato got curious and asked Elena what would have happened if she had accepted this knowledge while she was still in her universe.
Elena was not completely sure of exactly what would have happened but she was definitely able to make some guesses that had high chance of being the truth.
