Where are its hands? If the character's arms are too short for the sleeves, then the sleeves would be falling downwards as soon as they ended. As it stands right now, the piece looks like there are invisible rods holding up the sleeves.
The midtone is far too light, and the highlight is too big. The dark shadows just feel like outlines. Trying making your shadows and midtones cover a bit more area.
Also, the chest area with the name seems really flat. It feels like you didn't want to deal with shading/texturing the chest area, so you put the name there instead. Either that, or you put the name there but then were afraid to shade around it.
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