This one reminds me a little of Bette Davis in one of those creepy psycho movies she did. I love that shadow on the wall and the expression is truly creepy...this is great.
I think its a great sketch, and without the title she would just look very concentrated-not scary, my only crit is that her left am from shoulder to elbow looks too long, I know its because its difficult to draw folded arms - maybe if you just raised it up a touch...you have great skills no!
drawn in 31 min