I typically start with a pencil sketch. I use a 0.05 mechanical pencil to keep all the lines fine and minimize the amount of lines I have.
I outline with a Copic Multi-liner pen after my pencil sketch is finalized. I like using the Copic multi-liner pen because if I accidentally run the marker over the ink lines, nothing bleeds. I use 0.03 Copic Multi-liner pen.
I was always trained to color with the lightest shades first (oil painting, watercolor, pastel...)
For the skin, I used: E00 Skin White, E11 Bareley Beige, E34 Orientale; the dark brown is E49 Dark Bark.
For the lips/shoes, I used: R05 Salmon Red, RV29 Crimson Red, R29 Lipstick Red
I went ahead the colored in the darker shades (still no hair yet)--the top, skirt and headband. For her top, I mixed 2 colors because I did not have that exact shade. This is the beauty of these markers--you can blend and combine colors to make a color you need but either cannot (1) find, or (2) run to the art store at 12am to buy [which is usually my case =_=] To color the top, I used PRISMACOLOR Tuscan Red as the base, and then used E79 Cashew over it. I used E49 Dark Bark for the shadows again.
The skirt drove me a little crazy--it's a velvet fabric, and I have never rendered velvet before. On top of that, there were 3 visible tones: deep red, red-violet and a light crimson red. No marker exists like that. I ended up using B79 Iris as the base, running PRISMACOLOR Tuscan Red and R39 Garnet over the purple, then using E49 Dark Bark AGAIN in the dark areas. I alternated which color I layered, in order to enhance the velvet "effect". Obviously leave areas uncolored for the lighter areas. I used C8 Cool Gray No. 8 at the hem to blend
For the hair, I used (in this order--layer upon layer): W3 Warm Grey No. 3, W8 Warm Grey No. 8, E49 Dark Bark, and then a little bit of N6 Neutral Grey No. 6 to blend the colors. I used C8 Cool Grey No. 8 for darker accents in the hair. For the headband I used B79 Iris for the base color and N3 Neutral Grey No. 3 to blend.
For the nylons, you can see that they are not entirely sheer, so not much of the actual skin tone is peeking through. This became very tricky as the two shades I needed to use for this "look" could result in muddy colors=black and peach. After some tests on my scratch paper, I started with the medium shade of grey, which in my case was N6 Neutral Grey No.6. I stayed with warm hues since your skin tone is... mostly comprised of warm tones. I used W8 Warm Grey No. 8 and C8 Cool Grey No. 8 to blend. For the skin I used E11 Bareley Beige--First, I used N6 all over, leaving the skin area white, then used T6 Toner Grey No. 6 to blend from the N6, filling the white space. The E11 will pick up some N6, but not turn out to be muddy. Then you can go ahead and fill in the darker greys.
For the shoes, I used C9 Cool Grey No. 9 first, leaving white areas for the shine of the patent leather, immediately blending with N6 while the C9 was wet. I actually used N2 Neutral Grey No. 2 for the "brightest" part of the shoe, so it's not actually white (too much contrast). I used 100 Black for the darkest parts of the shoe. I would have used 110 Special Black but... all 3 of Special Blacks ran out of ink =_=
Next, you can see that I am almost finished with the girl except for her leather jacket. I barely even outlined any of the details on the jacket. I didn't even know where to begin with this jacket. It took a good hour to complete, and did not outline the entire jacket in order to keep the soft look of the lambskin leather. I did not outline the fur collar either, simply using shades of grey and brown (starting with the lightest grey) to mark the fur area. The lightest shade I used was E41 Pearl White, then E35 Chamois, E31 Brick Beige, and E79 Cashew (not as dark as it appears), then adding some details with E29 Burnt Umber. Finally, I used E49 Dark Bark again to add details. I also used a bit of C8 Cool Grey No. 8 to give a little bit of dimension. All those markers just for a tiny fur collar T__T.
I didn't actually use too many colors for the leather jacket. But I had to eye, approximately, where the highlights were, where they stopped and how vibrant they were. I started with my medium dark tone, C8 Cool Grey No. 8 to fill in the smaller enclosed areas (so I could better control my shading), quickly blending with B37 Antwerp Blue, also washing OVER the C8 with this blue. That way you have a hint of the blue and it does not appear as the dominate color. My lightest color was N3 Neutral Grey No. 3, which was used to blend the lightest areas into the darkest areas. You can use N6 as well if the colors don't blend smoothly. I used C9 for the darkest areas of the jacket, applying this color last. The shadow is made with C9 and 0 Colorless Blender.
You can also see that I finally added the studs to the shoes, using any regular white Gel-pen. Mine is ridiculously old, but you don't always need expensive, overly fancy tools to get the job done. I added details on the jacket using the 0.03 Multi-liner in Black.
I then added her eyebrows using PRISMACOLOR Verithins in Dark Brown. I added a light line underneath her eyes using the same brown color; for her lids I used indigo blue and violet--more violet than blue.
The last and most important thing is the background. I have the COPIC airbrush system so I decided to create a light atmosphere. I first used B00 Frost Blue, then B02 Robin's Egg Blue for the darker color. It actually appears darker than it seems.
7 hours later...
I realized I didn't explain the belt or racerback tank. Both are simplified versions (2 colors of markers only) of the leather jacket explanation.
Below is the picture I finished last week, in case you were wondering. You can view a larger, higher-quality version of both images on my deviantArt page.
*I used a pretty generic brand of 14x17 marker paper for both these drawings.