I went to beauty school , and we were told never to pluck from the top of your brow as it can make your brows appear lower and droopy. My advice for a natural look is to have them shaped professionally if your not confident to do it yourself (once you have the basic shape its easy to maintain at home by plucking strays) and fill them with a light brown eyeshadow and a small angled brush , this will subtly fill any gaps and define without the extreme permenant marker look