His oufit looks good! I like the use of the blood splatter. The use of just grey, black and white really makes the red stand out. His expression is just the right about of mischievous, I think!
umm..well i'm not familiar with the story behind this, but i can say its well drawn and and the contrast between the animated character and the realistic looking blood everywhere gives this picture an interesting edge. so, yay! ^.^
I'm not an expert on digital art and catboys aren't my cup of tea, but I will tell you you have a good understanding of anatomy, great shading of black and white, and I like the blood