I am about to finish off Your Little Sister. I would be done by now, but I decided a minor character was too delicious not to weave into the plot for greater conflict.
Your Little Sister stands alone, but I also have book two and book three outlined. This minor character makes a larger appearance starting in book three, in my outline, but when I came to her part in book one, I could not ignore her unique voice.
After all, when the Empress demands more pages, who am I to disagree with the Empress? Certainly not the main character—and that gets her into all sorts of trouble.