I'm not too sure either, but maybe if you look really closely, tucked into the Knight's left shoulder, might be her head. I can kind of see a hairline and her hair flowing over her back, but really it could just be the Knight's armour haha
I think you're right; her head is against the knight's left shoulder. You can see the dark brown hair. The trick is that due to the color palette, the shadow cast across her face almost hides her head.
I really love this, the bold brush strokes are so beautiful, I like how the whole frame appears to be streaked with blood, but the red could be flower blossoms from the trees. Very nice, I like it!