For vision, you easily acquire five stars! Channel's new Believix design is gorgeous and it's evident a lot of thought has been put into it. You seem to have had a wonderful image in your head, and you've portrayed it very well in this piece.
For originality, I have given you three stars. The outfit is unique and very lovely, but I have seen similar poses used many times for Winx artworks. Using less popular and widely used poses will help your work stand out.
You receive four and a half stars for technique. The colors you have used in this piece work very nicely together, giving your character an aura of "together-ness." They are very uniform and give the piece a nice, calming feeling while still creating an impact. There is still room for improvement in your technique, but you're on your way to mastery.
For impact, I reward you with four stars. As stated before, it is very similar to other Winx pictures, and yet, there is something magical about it that makes it more than "just another Winx drawing." Your character is lovely and you have done a fantastic job of illustrating her.
Overall, this piece is nearly flawless. Job well done, love!