Ha ha, well that's one way to look at it. But yeah, all three of them were distinct in their own way, and Shirley, despite having the smallest role among them, was still my favorite. I can't help but love the innocent pure-hearted ones.
Yeah, to me Shirley represented a kind of hopeful side to the story that Lelouch may have been able to have if he had let her into his life. Unfortunately, it wasn't enough to just push her to side, I guess she had to die so that that hope could die with her. It would've been great if she had lived though. Still, it's hard to imagine how she woudl handle the whole ZR thing, but then I guess that would also depend on circumstance (like if she still even knew who Lelouch was)
Now that I think I would've liked to see
But unlike Light and Mao I don't think he was pure evil, so he probably didn't deserve an end quite like that, despite his bone-headed ZR plan.