This has bounced around a lot. Maxa' put it up on a few places. I got it from her a little while ago since I really liked how she did muscular women and wanted a good action pic for Dee. Dee's kind of cheaty with the force of her jabs :)
Looks like a fair bit of the tags got it wrong. She's a dragon-girl rather than a demon-girl. Like many OCs, there's a pile of other art about her over in my gallery. *goes to see about adding the right tags* :)