[Minhnie.Mouse]

LOL, the silhouette's doesn't have to resemble Chrissa and Omid's figures, they're just figures. The reason why I don't think it is them is because, according to 2 decisions which 'can' be made by you(Lee): 1: "Look for me at the bottom"(When they are separated after making their way across the sign in which it snaps. 2: When Lee is about to die, saying his goodbyes etc, you have the option to tell Clem: "Look for Chrissa and Omid" (These are the choices I've made and when I've watched the scene after credits, I was quite confused since Lee(you) specifically said to Clementine to stay near that area and lookout for Chrissa and Omid.)

In addition, you've got to take positioning into consideration, you perceive that the person on the left is 'fat' is because when the person is walking they move their arms allowing the figure to be more wider. The opposite for the person on the right where arms are by his/her side. Now onto height, the person on the left appears to be shorter may be because he/she is standing further back making him/her shorter as they are treading on a hill.