Shazam!
Mary Marvel, older sister of Billy Batson. Ultron, the robot with James Spader's voice in the second Avengers movie. This would be a good fight.
Drawn in Clip Studio Paint Pro on a Surface Pro 4. Here is the time lapse video:
Looks like YouTube fixed their issue with the embed codes. So for those too lazy to click on the links for my last couple of videos...
You know what, play them all at once, you can pretend you're plugged directly into the Matrix or something.
Oh, here's a B&W line art version: