Hi. At first glance the picture is very enticing as though you are drawn into the world of faerie.
But there are some problems that I see. First is the use of the camera. While the fairy on the right is in focus, the one on the left does not appear to be. Perhaps it is my eyes or intended soft focus but if it is meant to be soft focus then both should be soft.
A major fault is the shadows. Notice how your characters' shadows are back and to the left, notice the shadows of your forested background. They are forwarded and to the right. Yes I know the background is a static background, but if you are going to use a photograph or pre-made backgrounds you need to match the shadows. If you add shadows in Photoshop or Corel, you should blur them. Notice how harsh the shadows are of the fairies and how soft they are on the fairy.
Also the background has fall folage while the foreground is green
You did well in adding the colors of the magic to the fairies face and body. You also did well in the overall balance of the scene.
Please do not think am being harsh but only pointing the obvious.