User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-3481504-20150916140720/@comment-24834479-20150917023110

Before the universe came into existence, before the "Big Bang", there wasn't just an endless empty void. There wasn't nothing; There was the darkness. Can't give too much away, but hope that helps. There is no time set for when Eve came into existence, just that she was before the Angels. If she is half Leviathan, she could also be part Deity.