I have to ask. If I said it was bad and you had to scrap it and start over, would you?
It's great work, so there is very little to critique:
The hair strand reminds me too much of the final fantasy Sephiroth from Finalfantasy 7, personally I would like to see her without it. She will maybe look a bit older, yet that isn't a bad thing.
The knee looks flat, it's jarring because the rest of the character looks great. Adding some depth to the leg with shading will help.
What I like:
The heart symbol on the clothes, I really like little traits like these on characters. The same with the bat wing at the back, I like what it has to say about the character.
Your light does a fantastic job of telling the material, especially the boots and the rim light on the jacket stands out.
My idea from what I see:
The pose tells me a reckless fighter. There is lot's of indication of her being a vampire. Her angled face, hair and clothes makes her look like a woman who wants to hide her age.