I don't think speed is that matters. This took you a good while but it shows in the picture itself. I love it! The details, the colors, the tones... Everything works perfectly together. Definately one of the best I've seen from you.
nice colouring of the dress. whats suiren's left hand doing? looks a bit akward somehow. the sleeves and the overall-flower-like style are very good done. but.. (yes ther's a but -.-) i don't like her face. she looks absend minded and reminds me more of a doll than a person.