Woody
First of all, I would like to say that I loved this film. There are some things that I did not understand though. Combo obviously invited Milky as a trap, not necessarily to kill him, but to hurt him in one way, or the other. Why didn't he try to hurt Woody, because it seemed he was doing this because he was angry at the fact that the girl he loved, which was Woody's girlfriend turned him down. I would think he would take his anger out on her boyfriend, rather than his best friend.
The second thing is that I didn't think Woody would give up Shaun so easily. After Shaun decided to stay with Combo, I assumed Woody would pursuade him out of it later, or inform his mother, or something?