Sai is the character in the middle of this Naruto Wallpaper who is looking lonely and appears to be torn between two extremes. These extremes are the friendly team constituting Naruto and Sakura or the other end of the spectrum, Orochimaru.
I happen to like the effect which has been created between the two sides. The green on the left signifies that they are from Konoha (the leaf village) while the right side is just a brown colour. Overall there isn't much to say about this Naruto Wallpaper but it is quite attractive.