Well where to start, I could make it list like or something:
- she looks like her self +1; as you may notice many portraits do not show the person as they really are, they may be perfected or unreal but in this case her character, Olivia, she totally represents her with her not-smiling-but-happy face wondering about something as she always does! - Hair coloring and shading +2, she for sure has a mix of natural and dyed blonde and you could pain that just perfectly! - stance, position and perspective +3, just well done, there are no distortions, the perspective is real and 1:1 realistic. - Shading/Lighting +1, nothing to say here, its just as right as it should be.
So all pros except id say the lips "shine/gloss" it looks a bit weird as if her lips were dry or something since it doesn't look as if she actually was wearing lip gloss. The left eye(background) has more make up O_o
Very well done, her hair looks so real, you you a great job! And sense I am a huge fan of Anna Torv and Fringe, I am very picky when it comes to anything to do with Anna or Fringe, but this is beautiful work!