The raven is an aspect of the Morrigan, a Celtic deity often associated with battle and death. I noticed that Allistor the Pallbearer calls Bernadette "Morrigan" in another sketch, meaning she may be that deity in a modern aspect.
If the raven that appears is Hugin, it would be appropriate that they should be acquainted though not a direct connection in mythology.
I believe that raven is Hugin, classically one of Odin's ravens in Norse mythology. He's a member of the Vigil in this comic, not a pet. Honestly, I was kind of hoping that he was Raven, from the mythology of the Pacific Northwest First Peoples in North America, but that doesn't seem to be a popular set of legends.
Ahhhhhh so PRETTY! I love LOVE her eyes, of course, and glowing like the feather in her hand just makes this a wonderful piece. Seeing your sketches and reading what's up of Death Vigil has been really great, so thanks for posting it!! And seeing her in realism just makes my inner fangirl so happy. You rule!
You know what, i look forward to the almost daily nebezial updates. Every time i see his art i tell myself i'm gonna start buying his comics. But this picture and the rest of the Death Vigil stuff has finally forced me to put my money where my mouth is, first thing i'm doing when this comic comes out is getting it!