I think I figured it out. Lelouche is basically living the Near Side of the Moon route right now. CC is the main heroine, and Kallen is like Ciel. Except Kallen is totally fucking awesome.
Meanwhile, stuck on the Far Side, there's Nunally, Milly and Nina.
Shirley, though, she's the one that gets killed on both sides. Her moe factor is that nobody cares about Shirley, and she'll probably get killed again somehow after meeting a creep in the park who transforms her into a crazed killer. "I think I've become as good at this as you, Lulu!"