Mysterious waving figure

In the 7th disc of the Season 2 DVD box set there is a special feature called "character connetions". While navigating through these character connections there is one character that is a mystery. This is that of a Mysterious Figure Waving. This figure is connected only to Jack and Christian Shephard, as well as to Claire Littleton. I'm starting to believe that this figure has something to do with Christian and Claire's fate. What do you think?

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