Alpha Vampire

? Alpha Vampire, the first Vampire in existence, was created (sired) by Eve, the Mother of All Monsters, in accordance to bring about the end of humanity and the dominion of Earth by monsters. The Alpha Vampire was sired thirty thousand years ago and was the thing humanity first feared in the dark, when they built caves and fires and hunted animals.

Backstory
Later on, the Alpha Vampire sired more Vampires, by biting humans and infecting them with vampirism, and afterwards humans began to fear vampires, yet as humans' survival and technology increased, humans became sceptical of the existence of vampires, believing them all fiction, although few vampire sightings were reported even in modern times. The Alpha Vampire, however, remained, in the shadows, and adopted many young humans and turned them to vampires to continue his species.

Modern times
The Alpha Vampire was first encountered by Dean Winchester and all other Vampires in existence, when Dean was just infected by another vampire. Afterwards, Dean received a telepathic message showing the Alpha Vampire, a middle-aged black man, crouching down beside him and instructing him to convert every living human to vampirism. The Alpha Vampire left Dean's mind and Dean saved himself from succumbing wholly to vampirism and cured himself.

Captured, betrayed, and sold to the King of Hell
The Alpha Vampire was captured and imprisoned by? the demon Crowley and his henchmen. Crowley was seeking Purgatory, and thus he had captured the Alpha Vampire, amongst many other Alpha? Monsters and other normal Monsters themselves. Crowley asked the Alpha Vampire where the Gate of Purgatory lay, but the Alpha wouldn't disclose the location. So Dean and Sam Winchester arrived, and the Alpha smiled upon meeting Dean, recognizing their former vampiric connection, and the Alpha said that all Monsters, upon death, went to Purgatory, but still wouldn't disclose the location of the portal Crowley needed so bad. The Alpha Vampire had been kept locked in cage in Crowley's prison, yet he escaped.

Later, the Alpha Vampire had abducted a young human girl named Emily, saying that she was the most beautiful girl in the playground, and he stole her and took her to a nest of vampires. One day, the vampires returned from an "easy hunt" and led three stoned humans in. However, upon killing the humans, the humans' blood had toxins in, thanks to the Leviathan's stoning toxins, which had been ingested into food and which, when consumed, made its consumer stoned. The toxin proved to be fatal to vampires, and all Emily's vampire guardians died immediately. Emily was left alone until the Winchesters showed up.

Reunion
Dean and Sam rescued Emily, yet she revealed her allegiance to be with her "father", the Alpha Vampire, whom the Winchesters met. Dean decided to wisely put aside their differences and ask for a small sample of the Alpha Vampire's blood, which he needed to kill the Leviathan Leader possessing Dick Roman. Initially, the Alpha Vampire didn't comply, because he was still angry at being betrayed and sold to Crowley. Yet when a Leviathan showed up and betrayed the Alpha, revealing the Leviathans' plan to kill every other Monster too, the Alpha went insane and killed the Leviathan with Dean's help. Now temporary allies, the Alpha Vampire gave some of his blood to Dean, and mockingly said "see you next season."

A resurrection in the family
Dean had been taken to Purgatory with the Leviathan Leader upon killing the Leader, and thus Dean was apparently trapped with no way out. Yet he met a friendly vampire named Benny, who wanted to be resurrected and free of Purgatory. So Dean agreed to help him. Once free and back on Earth, Dean resurrected Benny who was kidnapped by Vampires and taken to the Alpha, who said to put aside their differences and showed regret at having previously murdered Benny.