How strange, this looks a lot like my friends, whose name happens to be Victoria.
But this is fantastic! Your work is stunning, it looks more like photography than traditional pencil and paper! There's so much detail, in the shading and highlighting, the skin, and especially the hair. <3
This is a special case for me; I used charcoal first to get the general dark patterns and used graphite for the more detailed strands. I do not use this technique often as charcoal is much more messy to work with. Also, fusing graphite and charcoal is a challenge which I have yet to overcome.