| Demon | |
|---|---|
| Type | Demons |
| Lore Origin | Judeo-Christian Theology |
| Seasons | S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15 |
| Kill Method | Salt, Holy Water, Devil's Trap, The Colt, Ruby's Knife, Angel Blade |
Demons in the Supernatural universe are not fallen angels or primordial evil spirits — they are what happens to human souls after extensive torture in Hell. Every demon was once a person. Centuries or millennia of unimaginable suffering strips away their humanity, leaving behind something twisted, cruel, and powerful. This origin is central to how the show treats demons: they are tragic figures at the root, but the beings they have become are genuinely dangerous and almost universally hostile.
Appearance, Possession & Abilities
Demons in their natural form are clouds of black smoke (red for high-ranking crossroads demons, white for Lilith). They cannot maintain physical form on Earth without possessing a human host. Possession is involuntary on the victim's part — the demon enters the body and takes complete control while the host remains conscious but trapped, aware of everything the demon does with their body.
Abilities vary by rank and age. Standard black-eyed demons have enhanced strength, telekinesis, and durability (the host body can sustain injuries that would kill a normal human). Higher-ranking demons can teleport, use powerful telekinesis, smite lesser demons, and in some cases alter reality on a limited scale. The most powerful demons — Azazel (yellow eyes), Lilith (white eyes), Alastair (white eyes), and Cain (bearer of the Mark) — possess abilities that rival or exceed those of some angels.
Hierarchy
The demon hierarchy in Supernatural is loosely structured but with clear ranks. At the bottom are standard black-eyed demons — footsoldiers and functionaries of Hell. Above them are crossroads demons, who make deals with humans in exchange for their souls (the standard deal grants a wish in exchange for the person's soul, collected after ten years). Red-eyed demons like Crowley hold higher positions. White-eyed demons (Lilith, Alastair) are among the oldest and most powerful. At the apex is the King of Hell, a title held by various figures throughout the series, most notably Crowley. Knights of Hell (like Abaddon and Cain) are a separate elite class created by Lucifer himself using the Mark of Cain.
In Supernatural
Demons are the primary antagonists for the first five seasons and remain central threats throughout the entire series. The demon Azazel (the Yellow-Eyed Demon) killed Mary Winchester, setting the entire story in motion. The first major arc involved finding and stopping Azazel's plan to open a gateway to Hell. Subsequent arcs involved Lilith breaking the 66 Seals to free Lucifer, the rise and fall of Crowley as King of Hell, and the ongoing moral complexity of Sam's relationship with demon blood.
Real-World Folklore
Demons appear in virtually every religious and mythological tradition. In the Judeo-Christian tradition from which Supernatural draws most heavily, demons are typically understood as fallen angels who rebelled with Lucifer, not corrupted human souls. The show's reinterpretation — making demons the end product of human damnation — is a significant creative departure that adds layers of tragedy and moral complexity.
The concept of demonic possession has deep roots across cultures, from the dybbuks of Jewish folklore to the oni of Japanese tradition to the extensive exorcism rites documented in Catholic theology. Supernatural's exorcism ritual ("Exorcizamus te, omnis immundus spiritus...") is loosely based on the Roman Ritual of the Catholic Church.
Weaknesses
Salt creates barriers demons cannot cross and causes pain on contact. Holy water burns demon-possessed flesh. Devil's traps (pentagrams with specific binding sigils) immobilize any demon that enters or is tricked into one. Iron has a similar repelling effect to salt. Exorcism forces the demon out of its host and back to Hell but does not kill it. Ruby's Knife and the angel blade kill both the demon and the host. The Colt can kill any demon. Sam Winchester's psychic abilities (fueled by demon blood) could exorcise and even kill demons without any tools.