[tuxedotservo]

Spoiler:

It's really tough to see, but I think the word is "dashed" - "A devote believer who dashed through the brilliant light of life." That sounds like Rosette...

Oh, and this:

Spoiler:

I think Chrno is buried next to Rosette, and they share a headstone. Considering they were inseparable to the death, this would be appropriate. Since little is known about Chrno, and you don't exactly want to put that he's a demon on the marker, it's done pretty well.