Oh. That makes more sense.

[Humans didn't live that long unless they were using some nefarious means. He did wonder then why she wasn't surprised that he'd met the man. Could she tell what he was? Most humans couldn't.]

Reforming? No. They live in a perpetual state of killing each other and being respawned elsewhere in the realm. It's a horrid existance and as far as I'm aware, they don't learn anything except how to hunt the other monsters better.