Dean Winchester

Dean winchester is the older brother and hunting partner of Sam Winchester.He is also a Men Of Letters like his brother(Sam).He is the son of John and Mary Winchester and half-brother of Adam Miligan.He is The Sword of Michael thus being the vessel of the 3rd strongest being in all of existence.He is a good friend of the seraph Castiel and in season 9 is half-partnered with the former king of Hell Crowley.

Personality
He is the oppostite of Sam he likes girls and is alot more hedonistic.He and Castiel are more bonded than Sam and Cas,he also didn't have as much fate as Sam did when Cas first told him that he is an angel.But he is in alot of ways similiar to Michael,He would of killed Sam instead of being him possesed by Lucifer.Sam and Dean split up after Sam finding out that Dean tricked him to be a vessel to Gadreel.He is the better hunter of the two admited by Sam and is physically stronger than Sam.

In Season 9 when he absorbed all the power from the demon part of The Word of God(Demon Tablet) he gained power comparable to power of Castiel when he "Emptied out" Purgatory.The power clouded his mind and causing him tp go on a rampage destroying any demon,angel or monster he came across he was called the new "Boss" of the universe.