Commission SF, Torog

First, some words about the silent partner :
Torog is the author of an online roleplay based on the famous serie "Stargate", here called "Stargate Coalition". He wrote webseries, too, such as Cepha on Lycra TV. For more, contact him.
Now, here are the order and its context ^o^ :
The action takes place in the Stargate Fusion universe. In this time, in a undefined future, filled by related human races, spaceships and odd planets, the "wraithes", sort of vampires, live thanks to the to vital energy of human, considered themselves as livestock. The energy is absorbed though a scar in their hand. I's an organised society and a matriarchy, in which female are rare and hold the power. My work here consists in drawing a wraith female : an attractive and powerfull female, a mysterious and beautifull woman but a monster.

fisrt sketches (approved) :