[the fact that he asked that right away tells Geir something about the sort of person his new acquaintance is immediately -- that's really his first thought, huh? this stranger is a nice guy. he's worried about the worlds they visit.]

Thaaat... we don't know. Qri says that usually nothing happens, but there could be cases where it does. I don't think it hurt the world when we visited Aimintas! We just picked up magic bones. We even asked the people who lived there if they minded first, and they said no.

Apparently, she needs them to restore her power, so she can keep all the worlds running. Because that's what her kind of witch does. That's just her word for it, but Genette and Brie, who've been with her even longer than the rest of us, believe her because of the powers we've been given.