well isn't this lovely. I'm really digging the different grades of graphite you are using. The way you use them conveys a different temperature of each tone. What I mean is you were to compare the different grades to a color picture of this picture they would match up correctly . I don't know if you did this intensionally but this truly amazing.
I love this new bust style art that you are doing, I miss looking at full figures, but the detail on her and just the slight touches in her outfit make her awesome, I have to say between WW and Black Cat, your commissions must be crazy.