Board Thread:Questions and Answers/@comment-5972544-20130724143413/@comment-4631119-20130724144101

As I believe you both already know, Hampnie is immortal, which means he'll return to his prime state once died. It's still unclear how he died and become undead, but he face true death when Ai buried him.

After all, we still don't know whether he has died before or not, so it's unclear as well, whether he still human or already undead (but resurrected as human) at the beginning of story.