From the pages of DC Comics and miscellaneous Teen Titans cartoons. Raven is a cambion, daughter of a demon father and a human mother. Her dad, Trigon, has four eyes hence the background spookiness.
Drawn using Clip Studio Paint Pro on a Surface Pro 4. Here is the timelapse video:
And here is the B&W line art version, although as you can see, I was accidentally drawing on the wrong layer when I was airbrushing the background in. So instead you get a B&W&-atmospheric-spookiness version.