There is a variety of different Characters on Supernatural
Sam Winchester :
The youngest son of Mary and John Winchester starts hunting when he was a child, and his mother was murdered by a demon.
The Oldest son of Mary and John Winchester starts hunting when he was a child, after his mother was killed he was a main caregiver for Sam.
The Father of Sam and Dean, Started hunting after his wife Mary was killed.
a friend of the Winchester, helps out other hunters with information on monsters
a hunter who takes up Bobby’s job after his death with helping give information to fellow hunters, he ends up getting turned into a werewolf.
a young hunter, daughter of Ellen and helps out the Winchester brothers a few times
a hunter who was a friend of John’s and started helping out the boys
the mother of Sam and Dean, wife to John Winchester, quit hunting when she ran off with John when they were young. gets killed by the yellow eyed demon when Sam was a baby.
An angel who rescued Dean from hell, and hunts with the Winchester brothers from time to time
An archangel who poses as a trickster from time to time
an archangel, Dean Winchester is there true vessel
a angel who wanted the Apocalypse and caused quite the trouble for the Winchester brothers
an archangel, Sam Winchester is there true vessel
an Angel who works with Castiel for a while when the angels fell
an angel who tricks the winchesters, but ends up helping them in the end
an angel who is the scribe of god, causes alot of trouble for the winchesters
an Angel who helps out the Winchester brothers
a prophet that works with the winchester’s
a computer geek who starts hunting with the help of the Winchester’s
a cop and friend of Bobby Singer who helps out the the Winchester’s from time to time
A cop who helps out on a few cases
a physic who is a friend of Bobby’s who has helped out the Winchester’s a few times
a Vampire who helped Dean in purgatory
a Prophet who wrote books on the Winchesters, but we find out in season 11 that he is actually God
the king of hell, who has become one of the Winchester’s allies
a demon who teams up with the winchester’s a few times and has become an ally
the daughter of Castiel’s vessel Jimmy
Men Of Letters
John Winchester’s father, who time traveled back in time and met the boys before being killed by Abadon.
from the brittish branch of the men of letters, she kidnaps Sam the first episode of season 12
a Witch, who is also the mother of Crowley and causes trouble for the winchesters
a demon who tricks Sam into killing Lilith to start the Apocalypse and drinking demon blood.
A Knight of Hell who time traveled and wanted to take the throne from Crowley
the demon who killed the Winchester’s mother and gave powers to the special kids like Sam
the leader of the leviathans
God’s sister ,also known as the darkness she causes alot of trouble for the boys