Billy Greene is a main character first encountered in Issue 10 of Image Comics' The Walking Dead and is Hershel Greene's youngest son and the brother of Maggie, Shawn, Lacey, Arnold, and the twin sisters, Rachel and Susie. Unlike majority of his family, scurrilous and rebellious Billy survived all the way to the Prison's destruction with his father and sole surviving sister. He quickly became an important side character, great shot and one of the few motivations for Hershel to survive.