[For the time being, Luna is excused from making physical reactions occur that could be waylaid by her health. It's a hard concession to make, of course, but Frisk will bear with it.]

Hope puts them in the tunnels- um, outside the city. But the city's safe.

[Which partially answers her next question. They seek some better words, glancing back at her from time to time, trying to take note of whether or not her energy is waning. It's...hard, when they don't really know her. Don't know just how bad it is.]

People don't leave very often. I don't think you can choose when you go.