Okay, it's hard for me to judge the painting at this stage, but I'll try. I think the composition and general concept work. The character looking of screen is a bit unusual but it makes me think she is in a bit of a dreamy mood, reflecting the past battle, so it fits here. Also it probably looks a bit "heroic", which also fits the theme.I think a bit of work is needed on the spear, so that it does not look asymetric (esp. the tip looks a bit off atm). The gloves also seem to have different thickness in the hand area, so you might want to adjust that while detailling. I did not notice that she was sitting on a head before I read it. You might want to make the eye "pop out" a bit more and separate the shape of the cape from the head a tiny bit to make it easier to recognise the head.I am unsure about the design of the shoulderplate, which is one of the areas of interest in this painting. Like the head it seems to made out of demon body parts, but I cannot say which one. The shape looks "organic" but somehow doesn't give me a "wow" effect right now (the red parts are very nice though, a welcome color accent).All in all this is already a very fine painting!