Sam Winchester

Samuel "Sam"  Winchester is one of the main protagonists of the show.He is a Man Of Letters and the younger brother to his hunting partner Dean.He is also the vessel of Lucifer.

Personality
He is kind-hearted and ease while Dean is not he first didn't want to hunt with Dean due to his girlfriend Jessica.But when she is killed by a demon named Brady he agrees.After coming out of hell with no soul Dean reffered to him as "Robo Sam" he didn't feel remorse for anything even he let his brother Dean become a vampire and started kidnapping monsters with his granpa Samuel winchester who was working for Crowley.In season 9 he became a vessel for a angel named Gadreel who was faking to be Ezekiel.Dean and Sam in season 9 parted and went their seperate ways.