Thread:SecondOpinion/@comment-28912449-20160731191243/@comment-5758863-20160801162943

Even her personality explains this:

A girl who as a child, she was a lovely and elegant girl, admiring her idols, fashion and friends, is proud of her bloodline Fontaine. This makes her much stronger together with her family. But since the end of the Third game Emily changed to a cold and distant person, a serious girl with an attitude focused on her missions and law, is more cynical, and more sarcastic than before, but still being good friends with Vanessa.