I love the antique look of this piece skye. HIBIRD! *squee* I swear they need to make a plushie like NOW...
Anywho... great job on the characters. Both on the coloring and overall drawing. I'm not usually a fan of Tsuna's character design, but you somehow make him seem halfway decent. I also think you did a good job on Hibari. His facial expression seems so calm... much less evil looking than usual.
My only criticism would be that the flowers with petals look a little odd. But that's just a small part in an otherwise amazing piece. Keep up the great work!