I really like the design. I think it's supercool! Only thing that bothers me is all the negative space between the wings and the smoke at the top. If anything, I might bring some flames up behind the wings to give them a little depth and have them peeking over the top to help fill that in. I think it would make the piece look nice and full- maybe even exp-nd the smoke out a tiny bit so the flame tips could overlap it.
I'm looking forward to seeing what you do with this!

I'll also admit, I'm jealous of your copic skills! I'm a bit of a copic spazoid. Maybe you'll post a tutorial someday!