What do you mean by character? Taking a standard figure and applying various morphs and surface settings (yes, File>Save as>Pose preset, just applying morphs, or File>Save as>Character preset, applying morphs and surface settings). Or creating a brand new figure? (You can't model or create textures in DS, but if you have those done then - with a suitably set-up model - the Figure setup tools will allow you to make the mesh posable.