I love the idea of a creepier witch-type look for Raven. It makes sense, since she is in fact a sort of witch, and worse yet, is the gateway for the demon Trigon, who may as well be renamed to "The Fuckin' Devil". What you've done with the hand there, while I don't know much about proportions and all of that, I find to be absolutely fantastic, going for old, eerie and slender fingers.
Great work!