Persephone hears them. It makes her glad that she thought ahead enough to twine them together, because it's tempting. After a few minutes, it's so tempting. At the same time, it might as well be white noise, because she can't give it meaning. Staying in this is like staying in nothing.

As they move through the chaos, the vine thickens, sprouts flowers and leaves and tendrils to help hold them fast together.