Wow, yeah; this is gorgeous. Really lovely work all around. Design, poses, lighting, effects... everything dovetails nicely. The outfit works fine; the background's got a distinctly techy feel, after all. And I quite like her expression too. Not all evil overlord types have to be vicious and overt about it. To me, the fact that she can lead her evil, demonic, blood-drinking minions while looking so calm, happy and contented only enhances the creepiness factor -- it's good use of what TV Tropes calls Dissonant Serenity.
Really terrific job here! The scene, lighting, fx, poses all go together very well here. At first glance I wasn't sure I liked the sci-fi aspect of her suit but after a little thought, I REALLY LIKED IT! Excellent.