While my gut reaction is that the knight executioner was a person who's protecting the graves, is it possible that it's an android/cyborg situation? Maybe a precursor to Saya that ended up vulnerable to the miasma?
I just had to say that I really, really like Parsley. A lot. To the point where its kinda scary. And I really like how Parsley looks on my bedroom floor and I really like how Parsley looks when garnished and I really like Parsley Parsley looks when its chopped. I really like how Parsley smells...