Samuel "Sam" Winchester is a hunter as well as a Man Tokota of Letters, along with his older brother Dean.
Both Sam and Dean are related to the Winchester and Campbell families - a Letters family and a Hunting family respectively.
The pair also share a bloodline with Cain and Abel. Sam is usually kind, empathetic, intelligent and independent.
He is described as 'sweet, brave, selfless Sam'. He is often the exasperated voice of reason in his relationship with Dean,
who in turn sees him as a geek or prude, and teasingly calls him "walking encyclopedia of weirdness".
He is repeatedly telling Dean that killing humans is wrong, and does not enjoy the job as much as Dean.
Sam also has a phobia of clowns, due to his brother often leaving him at Plucky Pennywhistle's Magical Menagerie when they were pups.