Lilith

Lilith was the old rabbis answer as to why the Hebrew of Genesis reads in regards to the creation of Adam.  It reads that G-d created them male and female.  This was well before any mention of Eve.  Rather than say that Adam was a hermaphrodite they created the female character of Lilith, and she was trouble.  Her name comes from the Hebrew word for night.  She ended up being expelled before Eve was created.  She became sort of a demon in Jewish folklore.  She was associated with the night of course and owls.  Some Jewish groups also believed that Lilith resided in mirrors, where she would wait to steal the souls of young women when they looked in the mirrors.