These pencil stages are shown on white so that the tutorial is easy to follow.
Loosely plot the layout, notice the way the body of the faun works with the curve and flow of the tree.
When the pencil work is done and you are happy with the layout, finish off the drawing with a marker or ink pen. I used a fabre castell brush nib ink pen. I used a tria reflex blue marker and a pentel correction pen for the highlights. Here is another version on different coloured paper, using a black marker, an old pantone marker 032 (now discontinued) but a copic basic red marker will do fine, a neutral grey copic marker and a pentel correction pen.
Here I have used a grey marker to make a softer blend between solid black and lighter tones.
Finally add highlights using a correction pen or gouache or whatever.