Vanilla is a product of Lussumo:
Documentation and Support.
Ana Lucia was totally a Cylon
But this is a space opera.I dunno, the sex, religion, politics and genocide on the show have never seemed space-operatic to me.
"Over the course of the third season, Ellen came and went in my thinking in terms of who the final five were. It probably wasn’t until we settled on the final four that I knew it was Ellen. When we got to the final four -- Tigh, Anders, Tory and Tyrol -- then it felt like, “and Ellen has to be the fifth.” Because Tigh being revealed as a Cylon was such a profound shift in that character, such a big leap for the show, that it felt really natural that she was also a Cylon." - Ronald D. Moore