I have put my opinion in about this many, many times.
To me, it looks like someone Liz's age dressed for a morning activity pre-getting ready, such as walking a dog or taking out trash.
My neighbor was dressed almost exactly like this recently when she was taking out her trash in the morning.
Star Wars, Harry Potty, LOTR all come to mind when seeing what the perp was wearing, which is also a valid point.
But, I would like to point out that this is my wife's common attire, someone who has never watched Star Wars, Harry Potter, or LOTR a day in her life.
Notice the soft boots and the kinda flowy robe?
She often wears tights with this, too.