First, I coloured the sky background. You don't have
to colour the background first, and often I don't do it this way, but it is something you may want to consider if you know you will be using darker, richly pigmented colours on your main image. If you colour the image first, and use say, red tones, you may find yourself pulling some of the red from your image into your background by accident. By colouring the background first, you can avoid this.
Touch Twin Marker used: B182.
I layered a couple of times, to get a nice and fairly even coverage. I didn't apply the colour with a great deal of care. Where I would usually move the pen in flicks or strokes to lay down colour, I actually blended in relatively loose circles to ensure a soft look.
When satisfied with the background, I moved on to colouring Matilda. I started with her skin, again mostly because that eliminates the risk of pulling darker colours from her hair and clothing into the skintones.
I only used two markers to colour Matilda's skin, because she has a fairly small area of skin to colour on her face and hand. On images with larger visible areas of skin, I would usually use more colours.
Touch Twin Markers Used: YR133, BR107