|“||Your father's in here with me. Trapped inside his own meatsuit.||„|
|~ Azazel when possessing John Winchester.|
Often, possession is the tool of sealed evils from the past looking for a link to the world. Possession affects both victims of the Possessors' malevolent acts and the hosts themselves, who all too often have to live with the evils they have been made to commit.
NOTE: not to be confused with Brainwashers.