[ Jo leaned on the bar; habit more than thought out choice ] Those in the life.

It's not exact here. Not outside of Dean and me. But there're a number of people who did the same kinds of jobs. Who worked on taking out the monsters in their worlds no matter what it cost them.

[ Most of theirs, unlike Jo, lost everything they had when some monster or demon invaded their life and killed the person, or people, most important to them. They were driven, and even after they got revenge—if they managed that at all—they stayed in. They knew too much to turn their back on the darkness and what it did to every unsuspecting person out there. ]