You can either use a sprite or a class similar to Game_Character or Game_Player. If you don't need the character sprite to move, the former is you best choice or else the latter would get the job done.
In the first case you only need to draw a 1/16 part of character image (for XP sprites). You can do it with self.src_rect.set(x, y, w, h) where self is the sprite class (if you use it in a class script) or a variable that's equal to some Sprite class ( @sprite = Sprite.new; @sprite.src_rect.set(x, y, w, h) ).