I like the mask! You could always include both versions on your character sheet, at least.
Your final armor design has some really interesting shapes, a few things stand out to me but I think it's really on track. First, it's all so dark, even the non-black colours you have in there are nearly the same value as the black. If you're bringing in a little gold, silver, red, blue, try to use it strategically in a way that'll give a better immediate read. Right now at first glance it's just sort of dark shape, barring the mask and the gold on the boots, and there's a lot of nice detailing that's just not that visible.
Second, the integration of the dress and the armor doesn't quite ring true to me; it looks right in earlier layers, but by the time the heavy armor is on she just looks like a black knight in a schoolgirl skirt. Not to say she shouldn't have one, just that there might be a better way to integrate it. Either make it look like something more belonging with the armor, or go the other way and bring in a few more fancy cloth elements so it's not standing out.
Third, the legs boots have some issues. The upper body has all these great interesting shapes, and the lower body is just kinda 2 big rectangles with some triangles stuck on. (I know you said it' s still a WIP so if that's part of what's in progress, totally ignore me!!)
Hope all that's okay, I think this design is super cool and has a ton of potential. =)
