User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-3976024-20150819160543/@comment-24834479-20150822013722

1. Death said that he couldn't break a soul into pieces. 2. Again, Eve was discussed to be either part Leviathan, or a powerful Leviathan. 3. When he was written, we left his rank unknown. If you notice, his true form is the mix of a Seraph and Cherub. 4. The writers have talked about this and each have their own theories, but there is no one answer for what the beings are. It is left up to the minds of the viewers. 5. I am actually unsure of this. I wasn't in the writing room when this storyline was written, and I haven't talked about it with the other writers. I'll I can say is that the way the Alpha Vampire talked about humans, it sounds like he came before them.