She's a pretty girl and nice gentle expression. I like the soft lighting. I am distracted by what seems to be over-sharpening along the edge of her teeth, nose, and hair highlights.
The focus around her eyes does look a little too soft. The light on the model is flat (in the shade?) and the brightness of the backlit leaves emphasizes this.
I was once told that when shooting portraits, always make sure that the eyes are sharp. The teeth and smile seem to be the focus when she has such wonderful eyes to show.