Dean and Bobby

Dean Winchester and Bobby Singer have friendly working relationship. Like Dean, Bobby is also a hunter. Not to mention Bobby being like a father to Dean. Bobby is there for Dean when needs it. Plus gives Dean advice to help him personally and on jobs. Dean is also Bobby's favourite.

Season 1
"No. But I know it's something big. Storm is coming, and you boys and your Daddy you are smack in the middle of it."

- Bobby Singer