Something that Dick Cheney recently said in a new documentary called "The World According to Dick Cheney" caught my eye basically: "In the face of duty, honor is meaningless". It reminded me of Cain.
There's something else about her that reminds me of Cheney. She also shot one of her best friends in the face and unnecessarily wasted lives and resources in an emotional quest for revenge. The parallels are uncanny.
Too bad she didn't turn out to be a Cylon, so we could make the whole "more machine now than man" parallel, but I guess we'll have to stick with Cheney = Vader for that reality to fiction comparison.