I am pretty sure that Zuko does not believe in killing anyone unless it is absolutely necessary. This is what got him into trouble with his father to begin with.
However, I have a question for everyone... has Zuko ever been in a situation where he has actually killed someone?
I think that maybe he has once, but I'm not sure if he actually killed the guy. That was in defense of Aang. In "The Blue Spirit" there's a guard who goes after Aang and Zuko comes up behind him, grabs him and throws him off the big guard wall.
I couldn't think of any others. Let me know what you think.
