Lets try some basics. The OpenGL Preview is just a preview (or approximation) of what the character will look like when rendered.

It has nothing to do with anime or toon style shading.  BelBel looks like that because she is toon shaded, that is the colors applied to her figure are toon like.

James is not going to look like a toon until you specifically apply a toon texture to him.

Now if you want a render of what is in the preview window, just make sure your preview is set to OpenGL (not Sreed), and make a one frame animation with style set to preview to an image file (preferably .BMP, convert to JPG later). Thats what I did for the attached pic.