So... I bought the volumes (official translation by Kodansha Comics) and I just finished reading volume 5. Obviously this discussion (if anyone posts replies) will have spoilers in it.

I would like to know what are other people's thoughts on the ending. I personally liked it, but I'm still feeling a little weird about it since I've never been a big fan of endings that leave things to interpretation. I still like this one for it's not one that's fully up to interpretation and that there's a feeling of closure that comes with it. And the interpretation thing is mostly just for one part of the ending.

Now, as for the thing that's left to interpretation, that is to say Johanna Faust's fate at the very end. I'd like to know what are your thoughts on it.
My interpretation of it is that she became a Demon, in a way.