She rubbed her side. That was one of the things they didn’t tell you when you were young, or maybe it was just that no Slayer had lived long enough to know, but as Buffy had grown older she’d learned that even if injuries healed, they never entirely went away. Sometimes, they ached.

I love this detail. And Buffy wondering about the fires. : )

Really lovely the way you've worked in Dana's story here, as the impetus for Buffy to question everything and finally quit. It feels very like her, to take that responsibility on herself, even if she doesn't know what she can do - or can't do anything - to fix it.