You state that YOU are writing a book about a Bad Boy and you ask US to tell you what makes him a Bad Boy, though we have no possible access to the book you are writing. But an example of a Bad Boy would be PeeWee Buchanan who murdered five cats: 1 throwing his sister's kitten in the well and watching it drown, as it paddled around mewing until exhausted, 2 breaking the hind legs of a cat and throwing it into the hog pen to get trampled and torn apart, 3 hanging a cat on a miniature gallows he built and then pulling on its legs to speed its strangulation, 4 tying a cat to a bedpost and throwing it in the creek and, when the cat managed to climb up onto the floating bedpost, fishing it out and shortening the string so that it would drown, and 5 throwing a cat out of his speeding car. PeeWee also shot a Black boy who was fifteen in the back as he was trying to climb a wall to escape PeeWee who was aiming a rifle at him. Now that's an example of a "Bad Boy". But we could not possibly tell you about your character in the unpublished manuscript you are still writing.