No, Sapphire. You have not failed me. If anything, I have failed you as your master. I did not expect to be away from Azula for this long, but there are simply things that are outside of my control, so please forgive this master of yours.
That is what I wanted to say to the dying teenager lying in two pieces on thee dirt besides my feet, but since it feels kind of cheesy and rather out of the character for my all-powerful master persona, I didn't bother to speak my mind.
Obviously, I would have if Sapphire was more than just a student of mine, as girls do love to hear these kinds of thing, especially when it is sincere and truthful from someone they care deeply about.
And it is sincere and truthful, coming from deepest part of my cold and unyielding heart.