Beautiful! The detail is magnificent and it flows so well, you did the body/facial features perfectly and the shading is spot on. Down to the tiniest details even the chain around his neck looks as though you could reach out and touch it! The hair and eyes are wonderful (the eyes just add so much to his expression) The details in his hand/glove are outstanding and the water/bird just blend and add so much beauty to your work! Your shading is just so natural, you really bring your characters to life. The color scheme you chose looks absolutely beautiful!
I absolutely adore your style, My favourite part about your work is the water and ice ^^ The reflection on the ice sculpture is very eye catching and was one of the things that drew me into your piece. One of the other main aspects that drew me in the brightness of your character's (Centaro) Hair and eyes and the detail you have added towards his body. The detail you have added towards his muscles are amazing ^^ You can tell how much effort that is needed to create a body as brilliant as you have done yourself.
If I'm being really fussy, I would say that the background and the transition between the human arm and the mechanical device are the only points where it might need improvement if they were not intentional. The background almost blends in with the shadows of your character and his neck and people could almost miss out the detail you have added into his neck. Obviously this could be solved if the background was a lighter or darker shade, or even if it had a blue or purple tint to it like the ice sculpture almost. The transition between the arm and the mechanical device is confusing for me. I don't know whether you were trying to blend it in with the skin or have it there almost as if it were armour? But I also think that you might have drawn some of the wires as his veins? This is one of the confusing bits for me.
Overall This is a very stunning Deviation and one of my favourites I've encountered so far ^^ The water is brilliantly presented and flows well with your character.