Nice picture, I see you put alot work into it. I really like the background but there are anatomy and proportions problems with Kairin. Sometimes, you are so into the work that you will miss alot of the mistakes. This is where other artists comes in and spot these things.
Alot of what blazerushmore said is right, I did some outlining of the original and my modified one. Sorry I used your picture like this without your permission but I'm more of a visual person so is easier to show you like this then to write it out.
What I do is flap my picture horizontaly, it is easier to spot incorrect things when you do this. Like a mirror when something is not right flipped, something is wrong unflipped.
~Cheers