I like it: the Castlevania influence is immediately obvious. I really like the work on the mask, gauntlets, and especially the backside of the cloak. As for notes, five things stand out to me from a broad view, in terms of what I would do if this was my own creation and I was pausing at this point:
- I'd work with more patterning on the blouse to narrow the amount of white showing: the current contours make that patch a little too dominant, drawing the eye to least detailed part of the design: reducing the amount of white on display to about 60% of present, in a narrower strip in the middle would make the dark Dracul vibe more dominant and I think make her look more sleek in general, in the way of those darker themed Castlevania characters;
- I would bring some of the gold from the back into the design on the front--just in framing/highlight locations; this two is prototypical of the art design for the afore-mentioned kinds of characters and would add a little more colour depth (and I think maybe realism) to the front of the design;
- I'd change the brown on the tasset on the front. I often use brown there too (or a mixed pattern with an overall brown feel), in order to simulate leather, but with this design, I'd consider leaving it with a tough farbic look in order to use one of the dominant colours (probably red, given this context, maybe black). In fact, I'd consider removing the brown from the design altogether, or just using a darker brown for the forearm armor and side portions of the boot.
- I'd make the necktie black, red, or gold, or some combination thereof. Probably solid gold, but with with a two-tone pattern for subtle texture, similar to what you are already utilizing.
- Is she a vampire? If so, consider giving her some fangs or a trickle of blood. The second is a little cliche, I will grant, but will make her menacing all the same. I think fangs would look even better, and not at all campy, given the inspiration here.
Again, that's all just firing from the hip--I hope that doesn't come off as too presumptuously detailed and specific relative to the kind of notes you were hoping for.