Howling Banshees

I've added the main colour mixes but you can do incremental mixes and use watered down paints to create smoother colour transitions.
In the end I used Burnt Umber to "black line" some of the armour pieces

You can mix some intermediate colours, but I find the most important thing with NMM is to work up to pure white to create strong contrast and make it look shiny

build up the highlights in the bottom of the gem, keeping the area facing towards the light source the darkest and at the end placing a small white dot there

I started the hair by sketching the shadows in the lighter areas and the darker ones while doing some rough wet blending, I then highlight the dark areas up to mid tones and the light areas to the brightest colours.
Only when highlighting do I try catching separate strands of hair.

There's plenty of good resources for this and mine aren't a very good example anyway, but these are the colours I used from bright to dark.
I used yellow to brighten the jade green and then added some white for the brightest highlights