This is a digital commission by dA superstar Marcio Takara [link]
Marcio just completed an issue of Image Comics' Dynamo 5 and has been announced as the artist for Boom! Comics' upcoming The Incredibles, which will be written by Boom! EIC Mark Waid. That's pretty awesome as first series gigs go, and my bet is Marcio will become a big name in comics very, very quickly.
I managed to score this amazing piece from Marcio a few weeks before he announced he was taking a hiatus from commission work. Hopefully, he'll return to taking commissions at some point, because I'd love to add some more work of his to my collection!
This is one of my favorite depictions of Redline to date. Everything from her body language to her facial expression is perfectly in character.