Her sister's touch is grounding. Alive Here. Beau doesn't say anything or even really acknowledge it, but Carter doesn't need her to.

"We don't need to do it all at once, either. Several teams at a time, distracting the horde from different directions..." Some people will get hurt, or worse. She lets herself imagine that, and moves on. "We get to safety, we regroup, we wait until the horde reaches the next location. Just keep chipping away at it like that. And Prescott had that idea to do alternates, to relieve teams."