What is Caotain Leon? I have spent the greater part of my life on this question. Ok I lied, I spent about the last Seven minutes on it BUT! I think I have the answer. Leon is...
A Mosquito. IT MAKES PERFECT SENSE!
Point 1.) Hes always buzzing around in your ear, making a pest of himself! JUST LIKE A MOSQUITO!
Point 2.) You rarely ever see him, but when you do, you try your hardest to kill him. JUST LIKE A MOSQUITO!
Point 3.) No matter how many times you think he's dead, he just comes back. JUST LIKE A MOSQUITO!
Point 4.) No matter what happens, everyone will still hate him for being him. JUST LIKE A MOSQUITO!
And Finally, Point 5.) I carry around a can of OFF! to get rid of him. JUST LIKE A MOSQUITO!