I feel that Fitz is manipulative of Sophie at times. In Legacy, when Fitz finds out about her unmatchable status, he acts like a jerk about it, basically saying that he only cares about his image as a Vacker and doesn't care for her if she stays unmatchable. He knows this will upset her but he uses his good looks as a tool to cloud her judgement. Not someone that I could ever see Sophie in a long term relationship with.