Well, that’s one of the disappointing things… The Bern look alike plays almost no role in the story. She has like, one line? Maybe two? It made me wonder why they bothered making her look like Bern at all.
Well, I can’t get too into the connections between the three stories without getting spoilery, so I’ll just say that while there’s a definite connection, the stories can pretty much be enjoyed as stand-alone tales.