Xavier Remington 
It rarely happens but yes it’s possible for a Demon to possess a Vampire. The reason this phenomenon is rare lies in the truth that most demons generally look upon vampires as being way beneath them. Demons usually consider vampires other than First Generation as being nothing more than useful idiots at best. Of course, some such as the Second Generation Dracula impress them. There’s also the fact that the human souls of vampires are already corrupted, and in essence, owned by Hell. However, there are vampires who fight for justice and protect humans who might be potential targets for the forces of darkness. Demons are always in the business of bringing everyone they can into the fiery shadows of Hell! First and foremost they crave the conquest and corruption of fresh human souls in the name of their dark lord The Devil. The souls of humans are quite powerful with massive amounts of metaphysical energy connected to Heaven. This makes possession a challenge worthy of their talents despite the lowly human-animal form.😈
The Convenient Demonic Vessel
Since vampires have demonic DNA they are conveniently compatible vessels for a higher dimensional demon seeking physical form without having to fight the human soul, their Guardian Angel, and the general forces of Heaven. Some vampires might consider it an honor to be the vessel for a denizen of damnation while others would use their strong willpower, and psychic abilities to repel it. Often such possessions are used as a last-minute emergency vessel or the demon decides the vampire is in the perfect place to partake of a diabolical device to further darkness on Earth! Sometimes the vampire in question offended the demon inadvertently or on purpose. Perhaps getting in the way of a perplexing plot to weave humans into their wayward web. A vampire could easily enter the scene not knowing what the score was and just go to town on key humans thus creating an unwelcome blood bath!
A Possessing Demon Needs Permission From Patron And Sire
Ultimately a demon would have to get permission from the original patron demon who spawned the first generation of any given vampire line. The dark spirit of the Father or Mother Demon is connected to every single vampire in each successive generation. He or she technically owns the human soul of the vampire and acts as its keeper in hell. They are the one who formed the vampire’s dark spirit in place of the disconnected human soul. It is also good form to gain the consent of the living vampire sire. Especially if they are still close with their child of the night. A vampire sire will tolerate nobody but the patron demon having dominion over them. They are the one who captured the human soul at the ground level when they transformed them into a member of the dark bloody living dead!
The Power Of The Patron Demon
Ultimately the Parental Demon is the only one who can possess any of its vampires instantly without permission. The vampire would be helpless to fight it off as its soul is already intertwined with the demon! High-level Arch-Demons and the Devil himself would also be able to possess a vampire with ease, and would not require the permission of the Father Demon. This is due to the Archdemons being the quintessential Fathers Of Hell itself! Although depending on the demon’s power, and importance permission would be requested as a sign of unholy respect.
The Demi-Demon Possession Reward
As vampires are generally considered 1/4 demon to a degree it’s plausible that a deeply possessed bloodsucker would have its DNA, and body structure altered. Enough to be considered a Demi-Demon. Although, this depends on the generation of vampire along with their age. Higher generations of vampires, and ancient ones have the most paranormal powers. As a Demi-Demon it would no longer crave only blood but the entire human body bones, and all! This doubly monstrous manifestation would cease once the demon left the vampire’s body. Unfortunately it does leave the vampire more permanently powerful over the rest of its life. Possibly with the same power as its higher generational sire!
A Powerful Yet Temporary Demon Vessel
Like human possession, the vampire’s body would eventually weaken from the demonic possession due to the powerful burning dark metaphysical energy a demon exudes! The paranormal vampire body would last a lot longer, and the whole human meals would aid in an extended stay but the body would eventually decay under the supernatural stress. Only a demons natural physical reptilian-like form can sustain it in this Universe. Luckily Angels actively prevent such manifestations that require so much focused power that it sets off alarms throughout the Heavens! So it must leave when the vampire dies if it takes it to that extreme. There are exceptions like the Devil’s human-like form that has been in existence since Halloween 2013. It was created within a magical metaphysical maelstrom of mysterious Moira. Its unusual form is cloaked from Angels. He is able to sleep within it and then be active in Hell as his leisure.
The Signs Of A Demon Possessing A Vampire
It’s hard to pinpoint the signs of vampire possession vs the blatant signs of human possession. The most obvious is a constant red glow in the eyes. Such crimson illumination is usually displayed only when a vampire is extremely angry or seriously jacked up on sanguine energy from gorging on blood! Total blackening of the entire eye, including the whites, is another sure sign. There is also often an additional set of fangs, a greater resistance to sunlight, and the facial features grow more monstrous when it’s agitated.
Exorcising A Demon From A Vampire
If you’re dealing with a benevolent vampire who suddenly goes to the dark side then be aware he or she may be possessed by a demon! The use of religious artifacts along with an Exorcism might aid in expelling the demon but you run the risk of killing the vampire! Often in these cases, the use of Witchcraft that calls upon the Earthy Nature Gods & Goddesses has a better chance of success due to their more neutral stance in the battle between Heaven, and Hell. It often helps if the vampire sire is against the possession and utilizes their paranormal power to aid in the fight to free their creation.
The Vampire Sire Comes To The Rescue
Vampires are able to psychically communicate with each other in dream realms as they sleep. So a battle between the demon against the vampire and the sire could manifest in that way. The sire or a higher generational vampire could use their powerful hypnosis powers to compel the vampire to fight harder to repel the demon. Or even compel the demon to leave. In some cases, other high-level vamps could pray to Satan or other demons to intervene in the possession. If the demon is expelled expect the formerly possessed vampire to suffer major setbacks in his or her quest to grow closer to humanity, and shun the darkness! On the other hand, an already evil vamp will grow seriously sinister beyond belief!🧛♂️ [Twitter]
Related Link: An Episode Of A TV Show From The 1990’s Called Forever Knight Where A Vampire Was Possessed By A Demon.
Great Article. I have a question. If the Demon that possessed them was the progenitor of the vampire bloodlines, and the Vampire was a First Generation, could the Demi-Demon Alteration become permanent and not Degrade the Form because the Vampire was bon with that demons dna?
Found a better way to say that. If a the vampire in question was a First Generation and the parent demon was possessing them to the Demi-Demon Alteration, would it degenerate their body? If not could the alteration be made permanent through magic? The reason I’m asking this is because I recall someone saying that demon possessed parent can become a demidemon if the vampires blood is involved, and the alteration is permanent.