Okay so this picture comes out striking with its remarkably contrasting blues and purples against a dull background. I like how the subtle background provides a striking clash with your blazing purple hair and the blues of your dress. The blue tutu and the elbow gloves provide a nice flow into your purple hair. I like the Gothic ballerina look. The rings, the tangled necklaces and the corset belts show the dark vibes and the torn stalkings add to the rough, dark look.
Another nice detail is the fact that you've painted half your nails blue and the other half black to match your dress' hues. The tiara shows the desire for beautification regardless of the dark Gothic attire. I like how how side of your face has a small heart while the other has streaming drops of black going down from your eye. It shows different aspects of the personality divides. Your expression looks rather serious but that goes well with the dark dressing and it shows some sort of skeptical curiosity. The spine is rather stiff but it still looks good.
The only downsides I could think of were that the picture is not well centered and cropped. The space on the right hand side is larger than that on the left hand side. The color contrast is nice but an overall hue could help emphasize and accentuate the mood of the picture such as a very faint purplish blue hue. All in all I think it's a very good attempt and can translate into a few symbolic interpretations in every viewer's mind. Those are my two cents, Good job overall!