So I think that Lucien is the Crawler in Fable 3, and he was also on shadow court, and so was Theresa. The evidence is there. The Crawler acts a bit like Lucien would, we never see Lucien die, and he is constantly aware of her. Theresa always seemed to have sinister motives in fable 2, and her form appeared in shadow court. Here's what I think happened, when the shadows came to oakvale, Theresa embraced it, and became shadow. Lucien joined the shadows in his Quest for the spire, as it had to be done. Theresa wanted the spire for herself, and they have fought a battle of manipulations the whole time through fable 2 and 3. Despite Luciens defeat at the spire, his shadow went to Aurora and found what is the darkness and became their King, so Theresa used the hero of brightwall in flabe 3, only because she couldn't use Logan.