You and Habit have known eachother for thousands of years having met to make his life diffcult. Whatd be the fun in making it easier for him to kill people. Since other angels didn't want to get their hands 'dirty' your job was  find Habit and ruin his plans. Usually he focused on on wars, and whatever else, but latley he's chosen to mess with the same 4 people. Making them repeat their lives in iterations, only to die again and again, because they get close to something..maybe figuring him out.