I left the pencil work as it was and prepared the file in Photoshop by painting flat colors underneath against a gradient background, then transferring the file to Corel Painter. With skin being the undermost surface on the character, I started with the face, collarbone, and chest, saving the hands for later as they're resting on top of her clothes. With some slight rendering with airbrushes and the Grainy Water blending tool, including shadows under her bangs, I left the sharper details for later as the makeup and her chin will need extra attention. For now, I needed enough so I could start on the clothes.
Temporarily suspending my "undermost surface" rule by not starting on her legs next (because I forgot all about them at first), I added slight tints and saturation where needed on the black portions of the dress, formfitting to the sorceress's slenderness and athleticism using several swift small strokes to create texture. I began rendering her hands slightly, avoiding completing the fingers but finishing the back of the hands so I could draw her hips.
Finally remembering she has legs after flattening the pencil and color layers, I shaded them with slow strokes with the Digital Soft Velocity Airbrush tool and followed up with frayed edges on the dress's hems. After finalizing the hands and legs, her chest was fully painted and the violet cloak and buttons were airbrushed. Next, her "neck jewel" (I guess) and collar were stylized—now it was time to complete her face.