Concept Art Session

Had a bit of a concept art session this evening, trying out several different techniques to get the look I wanted for a certain group of characters within my story.
Although they are very simple in design at the moment they also need to have a particular feel about them.
This is because they won't always look this way, and they need to be recognisable at that point too, without the reader being directly told who they are. And they won't have the glow about them at that point either!

More on these guys later, as there are quite a few different types of them, and I still may alter them more, to further enhance them.