I've always loved this manga and I literally LOL-ed when I saw this. You really captured the characters with your colouring.
Gui is a right laugh xD
And I was reading some of the other comments you've recieved and I remember someone saying that his hair is silver... well I'm totally confused... Maybe it's white blond? I'm doing a shading in of another prince drawing and I'm totally unsure whether to do it silver of blond xD
Anyways, you did a great job with the gradients and as a whole. Well done