Emma
(Spoilers)
So am I correct in assuming that she did not actually get killed? Her death was just a hallucination? At the end of the film, they don't show her body and you only see two body bags being carted out of the house.
The way this character was (mis)handled was really my only gripe and frustration with the film. She was charming and likeable but she was seemingly killed in a throwaway fashion, but at the end it was vague whether she was killed or not. Would have been nice if they had perhaps just shown her alive at the crime scene viewing all the commotion and investigation just to make that one plot point clear, and perhaps make the ending slightly less tragic as well.