Algo and Alt

Two of my friends are going to Let's Play a Minecraft CTM they asked a few of us to draw some art for them. Looking at it now I am noticing Algorythm (guy running) has a bit of Humon flair to his face. That was completely unintentional. Algorythm44 and AltBlu. I am not really sure how to shade this. I haven't really worked with digital art.