4. Lydia Rodarte-Quayle
Lydia has lived through almost all of her nine lives after flirting dangerously with a bullet to the head ever since "Madrigal" - the second episode of season 5. Mike came close to finishing her on more than one occasion after learning the devious vixen put a hit on him when he refused to kill his former contacts, out of Lydia's fear of being ratted out to the DEA. However, the ex-cop was talked out of the hit by Jesse and Walt and since then the body count has continued to rise thanks to Lydia's devious ways. She ordered the brutal execution of Declan's gang at the hands of Todd's uncle and his cronies when she didn't get her way and, along with Todd, has proved to be one of the show's more villainous characters in recent times. Which is why she's probably going to get her just desserts after an innumerable amount of stay of executions, and we don't expect her to cling onto that life of hers for too long.