I really like the all of these colors. I'd pick the first one if the image background is dark. I think the glowing orbs, one being blue and the other red, goes well with the violet in her costume. Good luck. Look forward to seeing her progress!
I think the bottom ones would suit a fire user better so I would choose one of the two at the top
The last one stands out to me the most!
I like the second one with white hair, looks for me the one with the most contrast.
I hadn't considered that! It's definitely a good point, so I think I'll go with that. 
Omg Sanguine!! I didn't expect to see you here but damn am I happy about it xD Your concepts look great so far!! <3
I've been sick for the past several days, so I haven't been putting in nearly as much time as I would like. That being said, progress is progress.
Cool lightning effect , and don't worry you got this cuz we still have time
With everything in mind the chosen color scheme looks great and works with the dark background but my eyes after 4 days still really like the last color scheme(bottom right). (my preferences getting in the way mostly, nice work either way.)
This is looking great. I love how lively and angry the lightning looks!
Thanks!
Still a long way to go though 
Awesome! She looks great so far. The pose and lighting are really epic 
Nice! Good job!
The lighting is looking lovely!
aaawesome!
Polishing the face and hair.
