I have been rereading Mockingjay (getting ready for the movie!!!) and I noticed that Greasy Sae is the only person who was involved in Katniss's daily life in the beginning and end of the books. She knew who Peeta and Haymitch were, but had never talked to them. Her mother lives in 4 and everyone else is dead (except Buttercup). What do you think Greasy Sae's purpose is to the story/why do you think SC choose to make a point to say that she came back to 12?