In 'Lighthouse' when Jin asked Claire how was she sure that the Others had Aaron, Claire responed by saying that she was sure because 'first my father told me and then my friend told me'. In the end of the episode MIB walks in and Jin thinks it's Locke but Claire says 'that's not John, this is my friend.'
My question is in what form was MIB showing himself to Claire as her friend? It could not of been in the form of Christian because she referred to them as two different people, 'my father and my friend.' And it could not of been in the form of Locke, because MIB could not take the form of Locke until his body came back to the island. My guess is that MIB was in the form of actor Titus Welliver.
What do all of you think? Any thoughts?