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Puppeteer Parasite can do this with science, but it lacks a certain je ne sais quoi.The Virus on the other hand simply cores out the host's mind like an apple, effectively "killing" the original personality and soul of the host immediately. And the Living Doll Collector uses People Puppets, how ingenious! What amazes Kelvek the Seducer is that you humans do it to each other, not that it isn't deliciously kinky. Also, though it shames Kelvek the Seducer to admit it, this trope is not solely restricted to demons. Angelic Possession works in precisely the same way, except that those feathery hypocrites don't know how to have fun with it.
You may notice that I tend to appear slightly obscuredbehind the possessed in artful depictions. This pleasantly subtle fact emphasizes that Kelvek the Seducer is "in charge." Sadly, mirrors will reveal Kelvek's true nature, making social outings... problematic.
Oh, don't worry. I assure you, Kelvek the Seducer is the only one here. If my ten brothers would be with me, we would be Many Spirits Inside of One. But then it would be cramped in this body and I don't like lack of space. And don't think about trying to get chummy with me; some may like a Symbiotic Possession, where the host and the guest are on good terms with each other, but I'm not a very sociable person. That said, you can rest assured I take good care of my meat-dresses, no sense taking over a body only to burn it out like a lightbulb.
Hmm, you aren't bad looking yourself. Would you mind terribly if I "change clothes"...? Don't worry, you won't remember a thing afterwards.More's the pity.
This is how Devilman works. In the manga, it's very pronounced, since anyone can be possessed the instant they succumb to acting on instinct. Naturally, bars and nightclubs prove great places for demons to go to possess people since there are so few inhibitions in them.
Any non-Gatekeeper human in Gatekeepers 21 who succumbs to the dark emotions is susceptible to being possessed by The Invaders.Any dark emotion. Even complaining about kids in your taxi.
Happens twice in Ojaamjo Doremi. The first time is Played for Laughs because the demon doing the possessing is addicted to scaring people and only possesses Onpu to scare Doremi and Momoko. The second time is far more serious in that the Big Bad possesses Momoko and traps her in a Lotus-Eater Machine so she can kill Hana to keep her from eventually undoing her curse.
Happens to Ling Yao in Fullmetal Alchemist. He accepts Father's Philosopher's Stone and allows Greed to take possession of his body so he can finally find the secret to immortality. Subverted in that after Greed regains his previous memories, he ends up as an enemy of the Homunculi and he starts working on equal terms with Ling so he can defeat them.
Also, Pride does something possession-like to Al at one point, operating the armor with his shadows while Al is out of it. He later attempted a complete take-over of Ed's body but failed.
Played for laughs early in Hayate the Combat Butler with Katsura Yukiji when a demon tricks her using money. Not played for laughs later at all with Athena Tellos and the Honored Spirit that possesses her when she's very upset. The first time she almost killed Hayate, Sakuya and Isumi. A curbstomp battle, in fact.
Curbstomp? Considering she needed to call on Machina's alternate form to disturb Isumi's final spell and it looked like Isumi only retreated to call for reinforcements and to get the muggles out of the way..
When Athena first threw Hayate out of her castle, it seems to have been mostly her; the Spirit didn't take dominance till later. Alternately, we could have never seen Athena un-possessed, it's just only become visible during these times.
In YuYu Hakusho, when Yusuke is fighting Sensui's true personality, Shinobu, and starts to lose his upper hand, his demonic ancestor Raizen decides to take control of Yusuke unexpectedly, laying down onto Sensui one of the most vicious, brutal beatdowns in shonen manga/anime. Yusuke is NOT happy when he recovers.
Demonic possession is more or less what Take Over magic amounts to in Fairy Tail. However, the caster is in complete control... unless they aren't, in which case they are a rampaging monster. Just ask Elfman, Mirajane or Lisanna.
The Soul Jar variant occurs in Yu-Gi-Oh! as Ryou Bakura winds up possessed by the spirit of Thief King Bakura (mixed with the spirit of the demon Zorc Necrophades) by putting on the Millenium Ring.
This was the most potent ability of Baby, the first main antagonist of Dragonball GT. Being rather pragmatic, he tried to possess the most powerful individuals he could to accomplish his stated goal (reviving the Tuffle race and exterminating the Saiyans) and quickly abandon a host when a stronger one was available. However, he also left a small part of himself in each former host, assuring that he could still assume control of them later if he had to. When his initial plan to possess Goku fails, he next targets Gohan, but only long enough to attack Vegeta and switch to him, which makes him a potent enemy for the rest of the arc.
Urd, Keiichi, Megumi, and even Belldandy have fallen victim to this in Oh My Goddess!. (In Keiichi and Belldandy's case, they were able to squirm free; Urd and Megumi needed help from a third party.)
One episode of Pokémon towards the end of the Battle Frontier arc ("Battling The Enemy Within") has Ash being possessed by an ancient king bent on getting back at the Legendary Pokémon Ho-oh and eventually taking over the world.
A more benevolent version happens in Gundam X, where Jamil's former commander Lucille, now in a stasis pod, uses her Psychic Powers to temporarily take control of Jamil's adopted daughter Tifa's body to provide him with critical information and closure before she can finally die. After her job is done, she willingly leaves with no harm done to Tifa (who even says Lucille's presence was kind and gentle), and manages to pass away in peace.
One Super Robot Wars manga takes this idea and runs with it by having Tifa get possessed by a metric ton of random characters, including Baron Ashura and Timp, with the threat hanging over their heads that if they don't clear it up soon, Tifa's original personality will be destroyed. Thankfully Lucille returns and plays Cool Big Sis before offering to take all the roaming spirits with her when she leaves. Of course, the comic ends with Tifa still getting possessed, but it's all about Rule of Funny anyhow.
A very real danger for jinchuuriki, as the demons sealed in their body will attempt to take control of their body if their will or seal weakens. Gaara and Shukaku were the first shown instance of this, foreshadowing Naruto's on-going struggles with the Kyuubi. Both ultimately found a method to handle it.
Sasuke was intended to become the vessel for Orochimaru, who himself is no longer human but a bizarre snake demon.
This happens to Konekomaru in a filler episode of Blue Exorcist. The demon, lured by Konekomaru's fear of Rin, uses this fear to temporarily take control of Konekomaru's body. When the opportunity comes along, it fully possesses him, absorbing him and making him a part of its' body. Rin snaps him out of it though.
Due to demons possessing the cursed weapons used to hunt vampires in Seraph of the End, touching such a weapon will result in the user getting possessed themselves. Ashuramaru, the demon whom Yuu forms a contract with, has made it clear that should Yuu's will waver, then Ashuramaru will happily take over his body.
The Seven Deadly Sins in The DCU, seven demons that represent the Sins, do this every time they escape their prison in the Rock of Eternity. The victims they possess are compelled to indulge in whatever sin the demon represents.
Eclipso, the former Spirit of Vengeance that The Spectre replaced, is another example from DC. Anyone who is unlucky enough to come into contact with Eclipso's black crystal prison will be possessed by it.
During a story arc of Sturmtruppen, Private Fritz is possessed by the demon infesting the outpost 666 and starts behaving like the one from The Exorcist. He's eventually defeated and cured when he's slammed on the head with a giant wooden cross.
Sleepwalker's demonic enemy Cobweb had his minions possess innocent humans at different points in the series to do his evil bidding. Sleepwalker was able to expel them from the humans' bodies by zapping them with his warp vision, which broke the demons' possession and sent them back to their home dimensions.
Deadman is a heroic ghost that uses this as his main power. It was granted to him by the Hindu goddess Rama Kushna.
Turned up in, of all places, Josie and the Pussycats. In the story "Vengeance from the Crypt," Josie is possessed by Satan while visiting the Cabot family crypt. Satan is ultimately banished by the Cabot family Bible.note Josie and the Pussycats #72 (1973)
In one Wolff & Byrd, Counselors of the Macabre story, the trope is inverted when a summoning attempt by an incompetent warlock causes a virtuous soul named Barry on his way to Heaven to involuntarily possess a demon named Wasistlos. The warlock eventually separates them and they both go to where they belong. However, the warlock screwed this up too — Barry gained Wasistlo's Third-Person Person speech patterns, and Wasistlos became kinder and gained Barry's love of music.
In Equestria: A History Revealed, as hinted at in canon and confirmed in the comics, Princess Luna's transformation into Nightmare Moon is said to have been due to the fleeing Nightmare forces possessing her; to exact a toll for her failures.
In The Powers Of Harmony, it eventually turns out that Cetus has been hiding in Rarity's magic font ever since the fight with Nightmare Moon. She later upgrades to Grand Theft Me by stealing Celestia's body and sealing away her Lifeforce in the Sun. Not that this works out so well for Rarity, since as soon as Cetus leaves, she implants Eclipse in her body as a replacement. Though Eclipse, at least, is willing to work with Rarity rather than waste energy fighting her for control (as long as she stays the dominant party).
In Perfection Is Overrated, The Usurper is able to possess anyone's body, and chooses to use this ability on The Obsidian Lord, the canon Big Bad, in a desperate attempt to win. He had originally planned to use it on the SUE who emerged victorious against the Himes, but their failure drove him to his backup plan.
Equestrylvania: Marble, a pony allied with Dracula, turns out to actually have been possessed by Actrise in order to pass among the ponies undetected. The scene in which the possession ends is pure Nightmare Fuel, as she exits her victim by crawling out of her mouth.
Nightmares Are Tragic: Luna was possessed by the NightShadow the instant she became Nightmare Moon. The story is about Nightmare Moon's fight against the Mane Six as in the Season One two-part opener; but the ultimate conflict is between Luna and her possessing Night Shadow.
Grover falls prey to this twice in The Prayer Warriors. In "Threat of Satanic Commonism", Josef Stalin (who is himself implied to be possessed by Satan) has Grover "demon processed", and while Jerry makes an attempt to save him after stabbing him non-fatally, he realizes he has to kill Grover, and does so by stabbing him in the throat (he gets better). In "The Evil Gods Part II", Grover is possessed again, and the Prayer Warriors try to save him by holding his head underwater and praying for him; the attempt fails and he drowns, dying yet again.
Embers: Katara is briefly possessed by a sea serpent, and later, a kanaloa possesses Aang at Boiling Rock.
In the My Little Pony: The Mentally Advanced Series, the canon character Sweetie Belle doesn't exist, having been possessed by the demon Thrackerzod before ever appearing. The spinoff episode Rainbow Dash Presents Haunting Nightmare is about a demon possessing first Twilight's toy Smarty Pants then Twilight herself. Thrackerzod intervenes, essentially calling dibs.
Rebirth's Shadow possesses his trainer Ethan, and takes control of his body at inopportune times. This is turned around after Shadow's Heel Realisation, and Shadow only takes control of Ethan to make him ridiculously powerful when he needs to be.
A very weird inversion or subversion or something in Civilization, which features the protagonist being possessed by Jesus so Jesus can come back to earth and preach against the evils of World War I. No, really, that's what happens. The film makes quite clear that Jesus inhabits the body of the protagonist.
The premise of the Evil Dead movies. The people possessed by the "spirits of the book" can even appear to change back into their former selves, only to lure their former friends into reach.
The Ghosts in Beetlejuice are capable of Possession. At least, they call it possession, but it seems to be different from ordinary demonic possession. Demons have to occupy the inside of the human host. Ghosts can control people from a distance, control more than one person at once, and even do it to each-other. (This happens three times; Betelgeuse himself does it to Barbara Mateland as a demonstration, both Matelands do it to everyone at an entire dinner party, and at the end of the movie, as a reward, Adam Mateland allows/forces Lydia to float in the air and sing. (The Matelands are obviously Harry Belafonte fans.)
This Is the End has Jonah Hill getting possessed by a demon after he gets raped by it.
Annabelle in St Trinians: The Legend Of Fritton's Gold gets possessed by her ancestor Captain Fritton. There is no real point to this scene, other then having the other girls scream, making the Emo do an exorcism, damaging Annabelle's self-esteem, and getting the second half of the clue.
Dan Aykroyd LOVES this trope. Ghostbusters I and II feature possession, with Dana and Louis getting it in GBI; and Oscar (sort of), Janohz and Ray in GB II by the same entity. It also forms a prevalent part of the game. There are even specific mooks who quite happily invade the bodies of NPCs, including the Busters. The most obvious example of this is, of course, Ray, who gets possessed after playing the hero — "they'll have to go through me first!" Nice going, Doc. The Xbox version of the game has him get possessed again later on his way to the security office at the museum, with him babbling incoherently over the walkie-talkies. Then, of course, there's Illysa and Peck, both of whom get possessed at the museum. And the Mayor, who gets possessed by Ivo Shandor. It's fairly safe to say that Mr. Aykroyd appears to be fond of this trope.
Spider-Man: the Goblin shows up in the next two films talking about things Harry could not possibly know—including echoing its advice to his father.
Happy Hell Night: A mock satanic ritual turns out to be real when a body of a priest is possessed by a demon and starts killing people.
The Shrine takes place in a small Polish village that is cursed with a demonic statue standing in constant fog. Those who approach the statue in the fog, eventually become possessed by the demon.
Arguably the effect of the demonic mask in Onibaba, though whether this is actually what happens, or just what the characters fear has happened is up to interpretation.
The title character in Warlock tricks a phony medium to channel the Devil by providing her with one of his lesser known names. The medium mutates to something more demonic and the Devil offers the host's eyes for the Warlock's use.
In Hellraiser: Bloodline, the Duc de l'Isle and his apprentice Jacques kill a woman to use as a host for the Cenobite Angelique. She bodyjacks the corpse for several centuries it seems.
In The Ghost Dance, an unearthed spirit of a Native American cult leader possesses a medicine man, and starts killing people. He's real goal, however, is to make a woman who looks like his dead wife his.
A Nightmare on Elm Street Part 2: Freddy's Revenge: Freddy Krueger, the demonically-powered monster who inhabits nightmares, has found a way to return once again by possessing Jesse, the most recent inhabitant of the house on Elm Street. He eventually accomplishes this by painfully transforming Jesse's body into his own.
Subverted in Forgotten Realms as very unfortunate incident. Dornal Silverhand noticed that his wife slowly turned into a withered shell. Some research revealed that she was possessed by "an entity of great magical power." He beheaded her to spare both of them any further agony (what is worse, she was carrying a child), only to be told that she agreed to be possessed by the goddess Mystra, in order to give birth to "special" daughters. Freak Out ensued. This did not stop the most powerful deity of that world, but youngest of Seven Sisters was born as a drow (which may be the sole good result of disaster). Mystra made Dornal practically immortal so he could find peace sooner or later, but averted his meeting with the last daughter, as she thought it would provoke another Freak Out.
It's questionable just how good that turn out is, too. Despite everything Qilue does, she also ultimately ends up getting her goddess killed and leaving Lloth the sole deity of the Drow.
In Robert Bloch's Cthulhu Mythos story "The Shadow From the Steeple", one of Nyarlathotep's many forms can apparently possess people. The possessed individuals look mostly the same other than their skin turning darker. Oh, and they also glow in dark.
Greg Bear's Eon has something somewhere between Demonic Possession and Puppeteer Parasite. The Jarts are a species (really a conglomeration of assimilated species and whatever you'd call "original" Jarts) that exist primarily as virtual personality fragments as a sort of hive mind, where bits can be combined, split off and downloaded into an artificial body to perform any given task. The book's protagonist, Olmy, discovers an "individual" Jart who had been captured by humanity centuries earlier and downloads it into his mental implants to study. The Jart, because of the "species'" inherent flexibility to modify itself to fit into any environment capable of holding a conscious entity is easily able to reverse engineer the implants interface and downloads itself directly into Olmy's mind, reversing their roles. (He gets better.)
The whole Order of the Blackened Denarius are examples of this; the denarii are the thirty pieces of silver paid to Judas for betraying Christ. Each silver coin is an Artifact of Doom that acts as a Soul Jar for a Fallen Angel. When the host is first possessed (by simply touching the coin with bare skin) only a "shadow" of the original Fallen Angel exists within the host. This shadow can exert some control over the host by altering the mind, making them see illusions or not notice pain or cold. This is as far as the shadow can go. The only blessing is that they don't go so far as to kill the host because they need the host to take up the coin. To go for full possession, the host must willingly take up the coin and angel. This is because the host, as a human, has free will and, no matter what the shadow does, it cannot stop that. White Night in particular examines the issue, as the host is unusually resistant, which has given the host and the shadow of the Fallen more time to become acquainted than is usual.
Cold Days reveals that there's also Nemesis, an entity affiliated with the Outsiders that can infect people's minds like a virus. In most cases, Nemesis does not seem to directly control its victims, and only warps their personalities so that they will further its agenda. Some of its victims do not even seem to be aware of it, although others clearly are, and in some cases Nemesis can assume direct control.
In Gav Thorpe's Warhammer 40,000 novel Annihilation Squad, this overtakes Kage. Fortunately, a blank can free him when in distance, and in the end, he is free enough to make a Heroic Sacrifice.
In Lord of Light, one of Sam's big advantages in the War Against Heaven is that he can control the Demon-like Rakasha, but when he slips up, the result is a demon walking around with all of Sam's powers—not a good thing.
From the Chronicles of Thomas Covenant, the Ravers are a trio of powerful demons who collectively act as The Dragon to Big BadLord Foul. They don't have true bodies of their own, but possess a variety of mortals across the series (they can possess humans without help, but require a power boost before they can possess Haruchai or Giants). Some main characters get possessed at different points and are able to describe the experience.
In The Heroes of Olympus, an eidolon, a greek possessing spirit, posseses Leo into firing on Camp Jupiter, as part of Gaea's plan to raise hosilities between the two camps.
The Warhammer 40,000Grey Knights novels, since they are about daemons and those who fight them, naturally has this occur a few times. Some of these daemons can take over machinery, as shown in Dark Adeptus.
Played with in Good Omens, which features a case of angelic possession after Aziraphale's body gets destroyed.
Serial, actually; he jumps around the world, including into an on-air televangelist, before settling on a crazy medium.
In the Mage Winds trilogy of the Heralds of Valdemar series, Big Bad Ma'ar is discovered to have been possessing the bodies of his descendants to prolong his own existence. This starts more like a case of serial Grand Theft Me, but as he suffers story-driven Villain Decay over the centuries, he eventually forgets to "finish off" the spirit of the final body he inhabits, bringing about his ultimate downfall.
Professor Quirrel might also count by the end of the first book, though it's an interesting case; the original owner of the body is in fact allowed to remain in control, likely mostly due to the possessor's weakened state, and in the climax is told to give control over to the possessor (and talks back). It is also apparently consensual, though possibly for definitions of the word which include death threats.
In The Drowning City by Amanda Downum, there's an interesting twist: a demon (jinn, to be precise) is bound inside a human shell by trickery and restrained and controlled by powerful magical bindings.
The Big Bad of Rivers of London is the Spirit of Riot and Rebellion Mister Punch who is possessing innocent souls forcing them to commit random acts of murder and violence. At one point manages to possess and entire theatre crowd all at once.
This is what happens in The Night's Dawn Trilogy when the dead return to the living world by taking over people's body, usually using torture by already possessed or satanist cults to force their way in.
In the last book of The Bartimaeus Trilogy an ill-advised magical experiment leads to a number of powerful demons inhabiting most of the higher members of the government. The demons have no ability to possess people, but the magicians summoned them into their own bodies, believing they could control them. Instead they obliterated their minds and set up shop. In order to fight them, Nathaniel and Bartimaeus have to truly trust each other and share a body - this has the added benefit of being temporary. Nathaniel can dismiss Bartimaeus, while the other demons are trapped in their new bodies, permanently cut off from home.
Things in Septimus Heap have this as one of their standard abilities. In Queste, this first happens to Hildegarde Pigeon and then to the Toll-Man.
In Wody Głębokie jak Niebo demons can possess people, changing them into mindless puppets. It was often used by wizards who wished for their wives to be nice and compliant. Severo merges Arachne with a demon to save her from execution.
A variation in Queen of the Damned, which reveals that this as the origin of vampires. Most spirits are benign or friendly. However, Amel was vicious and loved to prick people, having a thing for blood. After the king and queen of Ancient Egypt were betrayed and fatally stabbed by their nobles, Amel used this opportunity to enter Queen Akasha through her wounds and transformed her body into the first vampire. She proceeded to turn King Enkil by sharing a portion of Amel with him. Their hunger for blood was great, and even candlelight caused them great discomfort. Eventually, they learned that passing on the Dark Gift to others would lessen their hunger and vulnerability by spreading Amel around. Thus vampires were born. Each vampire has a piece of Amel in him or her; however, Akasha is the one with the spirit's "core". Should she die, all vampires would die with her (unless someone eats her heart and brain to take the "core").
Imn the Choose Your Own Adventure book Secret of the Ninja by Jay Leibold, one of the options is to agree to become a temporary vessel for a centuries old spirit (referred to a kami) that has been haunting Danai Kurayama, the main character's best friend, whose ninja clan has been rivals with another ninja family for centuries. The results depend on the reader's own decision, and can go from simply let the kami explain his Ghostly Goals and reach a peaceful agreement to have the kami perform a Grand Theft Me and use the main's body to murder poor Danai.
This is one of the abilities from the Imagin in Kamen Rider Den-O. The Hero even has four of them as allies, who regularly take possession of his body at inopportune moments. Despite drastically altering his appearance with things like colored hair, changing his voice and, above all, behavior, other characters don't really seem to notice something is off.
Inverted when the gang goes to try and exorcise a demon-possessed boy...only for it to turn out the boy is soulless, and has trapped the now-terrified demon inside his body.
The last season saw Winifred Burkle's soul destroyed by a magical ritual and her body taken over by an ancient demonic being called Illyria.
Vampires in the Buffyverse as a whole are an example of this—they're dead bodies possessed by demons.
Double The Fist: Mephisto gets possessed by a Demi God Fear Factory, causing him to shoot lasers, murder people at random (well, more than before) and steal Steve's car. He shows up again two episodes later leading an army of lumberjack pandas.
Henriksen: Smart. How long have you had those [anti-possession tattoos]?
Sam: Not long enough.
There's the young girls whom Lilith likes to possess and terrorize and kill their families, as well as her dental hygienist; Meg Masters, who has to spend over a year watching a demon use her body to kill people; "Born Under A Bad Sign" (S02, E14), where a demon possesses Sam and proceeds to shoot and torture Dean and attack Jo; Ruby's unnamed hosts (the blonde, the secretary, Coma Girl); Abaddon's meat suit, Josie Sands; Crowley's literary agent from New York; the crossroads demons' hosts; whoever the Yellow-Eyed Demon happens to be possessing (Father Lehne, Samuel Campbell, John Winchester, the hospital janitor); Alastair's pediatrician; and, of course, all the random meatsuits the demonic mooks take over the course of the series.
Certain angels also stick to specific bloodlines, as those bodies hold them better (or are the only ones who can). Castiel, for instance, possesses Jimmy Novak's body most of the time but, in one episode, took up temporary residence in Jimmy's daughter Claire. Powerful angels, especially archangels, will actually destroy the wrong bodies. When archangels leave their vessels, the original person can be left catatonic and/or heavily damaged. They can heal the body, but that's up to them. Interestingly, Lucifer was still an archangel, albeit a fallen one, and, as such, needed permission, too. The body he got permission from was his "plan B", and started slowly decaying even with the gallons of demon blood the host was consuming. The implication was that anyone else would have their body instantly incinerated. Sam was his True Vessel, the one he needed to start the battle with Michael, but, even then, Sam had to drink a couple gallons of demon blood beforehand for it to work right.
The Leviathans can also do this. Their first on-screen victim is Castiel's vessel Jimmy. They violently oust control from Castiel inside Jimmy and it's heavily implied that Castiel was killed in the process (though he later returned). Their host isn't strong enough to hold all of them at once, so they are forced to leave him and find other humans to possess.
The serial "Kinda" suggests the Mara could do this to Fifth Doctor companion Tegan. The trope is fulfilled in spades in the sequel serial Snakedance.
In the two-parter "The Impossible Planet"/"The Satan Pit", what may or may not be the Devil himself possesses the archaeologist Toby Zed.
The Fendahl Skull did this to turn Thea Ransome, a scientist, into a golden Grim Reaper.
In an episode of The Suite Life On Deck, Bailey finds herself possessed by the spirit of the ancient South American royal Princess Zaria when Zack finds her crown, thereby releasing her spirit from her bust.
Honey, I Shrunk the Kids. Diane gets possessed by the ghost of a Celtic princess when translating a spell tablet in "Honey, You'll Always Be A Princess To Me", and Amy gets possessed by the ghost of a 19th century comedian in "Honey, I'm Spooked" when the Szalinski family gets a trunk containing the comedian's spirit (who got released when they opened it).
Charmed. There are demons, and they possess people. Usually it's only a Grand Theft Me situation, but the Hollow can take over weaker-willed individuals who think they can control its power.
Seen in One-Episode WonderLost In Oz, with the Wicked Witch of the West returning by possessing a girl once she realized Dorothy could kill her.
Seen in The Secret Circle. Heather had been possessed by the demon Abaddon, which is why Cassie's mother put a binding spell on her. Heather eventually dies after being run over by a car and the demon then proceeds to possess Melissa at the end of episode 4, before eventually being killed while possessing Nick.
One Inside No 9 episode, "The Harrowing", features demonic possession as a primary plot element.
The Kyuss song 'Demon cleaner' is about a man with multiple personalities who believes that all his friends, coworkers and family are all against him; he comes to the conclusion that his other personalities are demons and decides to exorcise them with a vacuum cleaner. Yeah, really.
The Spike Jones song "Don't Give the Chair to Buster" has Buster's attorney claiming that this has happened to his client ("the devil was in him that day"), slightly subverted when the attorney admits that certain non-lethal but still dangerous assaults were in fact Buster's own idea.
This idiot won't let me go / Slowly penetrating the mind I tell you now, my little puppet / You'll suffer me You don't want to let me go / Till I've taken over your life I'll ensure you survive / Little puppet don't die Let me, let me die / Little puppet don't die Let me, let me die / Little toy don't die
In the music video for "Shot in the Dark" by Ozzy Osbourne a teenage girl goes to an Ozzy concert and gets possessed by... something, leaving her with glowing red eyes, long black nails, and truly insane '80s Hair.
The Makuta in BIONICLE are Energy Beings who can possess living bodies or robots. The only catch is that the body must be empty of a soul (but still alive, unless it's a robot, of course) before they can enter it.
However the spirits of unborn Makuta (basically liquid Antidermisnote AKA "Makuta essence" that hasn't been materialized and assigned to a specific Makuta body yet) are fully capable of possessing even souled bodies, which is what happened to Brutaka after he fell into the Antidermis pit containing said souls. Though it helped that to his species, Antidermis was essentially a drug, which made his body easily accessible for the souls swirling in it.
Frequently occurs in The Bible, to the point where it's lumped together with all the other diseases and mental disorders Jesus cures. One notable example: the truly unfortunate man possessed by one thousand demons that called themselves "Legion". Jesus, being well, Jesus, cured the man but spared the demons by casting them into a herd of pigs instead of outright destroying them.
This trope is sometimes played straight and inverted in East Asian religion, where humans can be possessed by benevolent or evil spirits. Usually, shamans and the like are called in to exorcise the person under possession.
In Voodoo, this is called "being ridden" by a loa. Whether it plays the trope straight or inverts it depends on the nature of said loa.
In Demon: The Descent, Demons don't do this. Instead, they use Pacts to steal fragments of people's lives to bolster their own disguise as being humans... Or, for a high level Pact, they can literally steal a person's life, removing the person from existence and taking their form, memories, everything as their own.
Daemons in Warhammer and Warhammer 40,000 can possess humans whose wills prove pliant. Though this provides a boost in power, a physical vessel can only sustain a daemon for so long; the greater danger is when a daemon possesses an individual with magical or psyker powers, and uses them to start summoning friends.
It's occasionally overlooked, but in Warhammer games it's possible to invert this trope; some daemon-possessed beings actually form a symbiosis with their daemon, using Villainous Willpower to retain control over their body whilst still being able to access the power of the daemon. In 40k this is the idea behind the Possessed units of Chaos Space Marines, as well as the Exalted Daemon hero from Warhammer Fantasy.
The most spectacular inversion of this trope has to come from Black Crusade, in which a Slaanesh worshiper summoned a Keeper of Secrets - a towering incarnation of depravity and debauchery - into her body as a way to achieve eternal youth. She succeeded at her first goal but failed at her second; instead she eventually "digested" the monster within her. So she summoned and reverse-possessed another greater daemon to continue extending her life. And then a third. On her fourth attempt, Slaanesh hirself appeared to elevate her to a Daemon Princess, in admiration of her willpower.
When Daemons were still part of the Chaos Space Marine army (as opposed to a separate army on their own) Daemons could not enter the mortal realm alone. This meant that, in-game, greater daemons and daemon packs couldn't be deployed normally with the rest of the army and had to be "summoned" to the battlefield. Daemon Packs were straight forward; just deepstrike them in and kick face. Greater Daemons were harder, as you NEED to have purchased a champion beforehand to have them possess it. This, of course, kills the champion. This could also be your Chaos Lord or his lieutenant, although most people just opted to sacrifice a nameless Aspiring Champion instead. However, if the sacrifice was killed before the daemon could manifest, then the Daemon still possess his flesh, but the necrotic corpse cannot sustain the daemon for long, which is represented by the daemon having to take instability tests every turn (and loosing health every time he failed, until he died).
In 40k, some radical Inquisitors create Daemonhosts, imprisoning a Warp entity within a ritually-prepared human vessel. Theoretically this gives the Inquisitor a great source of diabolic intelligence and an extremely potent battlefield asset; in practice it ensures that the Inquisitor will be tortured to death by his peers if he's ever caught, since the creation of such blasphemies is the work of the most vile of heretics. And, as of their latest codex, the Grey Knights.
Even inanimate objects aren't immune to this trope. In both games Daemon Weapons are extremely potent pieces of wargear available to Chaos champions, with the downside of occasionally injuring their wielder if he falters during the unending contest of wills (assuming the daemon doesn't break free completely and start rampaging across the battlefield). There's also an entire category of unholy amalgams of daemon and metal called Daemon Engines, from the Hellcannon of Warhammer to the Defiler, Forgefiend, and Helldrake of 40k. Even "normal" tanks from the Chaos Space Marine armoury can purchase Daemonic Possession as an upgrade, allowing them to ignore being shaken or stunned by oncoming fire - though they lose some of their skill at shooting, and daemonically-possessed transports may eat infantry who try to ride inside them.
In In Nomine, a particular 'band' of demons, the Shedim do this, unlike other demons who are given specially created bodies to inhabit while on earth, they enter the bodies of humans and manipulate the unlucky individual into doing evil things, which the host believes were his own idea. They can only stay in a certain host for so long at one time, the host's resistance increases over time and the demon MUST force their host to preform acts of escalating evilness each day or suffer. Their angelic counterparts, the Kyriotates, act similarly, only they can possess multiple entities (which do not have to be human),can totally take over the host's body (the host's mind is kept in a dreamlike state and will remember nothing about the possession) and may stay within a host as long as they like, as long as their host is not in worse condition than it was originally found. Needless to say, they don't force their hosts into depravity.
There's actually a Song (which are not to be confused with mere spells in the game) that allows any Celestial to possess any living thing.
The Original version of the Game, In Nomine Satanis/Magna Veritas, has the demons take posession of freshly deceased corpses. The angels use bodies of wiling believers who accept the possession to support the angels's side in "the big Game". Anyway, the entourage of the posessed will notice a sudden shift in the behavior of the aforementioned posessed, who is Likely to leave for a group of fellow angels/demons.
Eberron This setting provides rules for creating demons (and devils) that possess people. The Quori from Eberron, creatures from the plane of dream, use this as their main MO. They are unable to planeshift to the material plane, so can only rely on possession of people as they sleep. Ironically, the Church of the Silver flame has developed many tools and powers to deal with demonic possession (as they focus on hunting down demons). Those very same power can also be used to end quori possession just as effectively. It's a shame that most of the people working of the Silver Flame are unaware of the Quori and the Dreaming Dark's plans for Eberron.
Ghosts in some editions could do this, and it's the signature trick of the odem, a type of disembodied evil spirit from the Ravenloft setting.
The magic jar spell, which has been part of the game since the first edition and allows even humans to play the part of demonic-possessor-from-the-soul-jar.
GURPS: Creatures of the Night has a... thing that uses some sort of cosmic power to possess entire buildings.
Shadow Run: Certain extraplanar spirits are unable to remain in Earth's astral space without weakening unless they can anchor themselves to a human host. Bugs Spirits and Shedim, for example.
Nomads as well: Astral beings that possess their hosts and make them murder other people.
Demons in Unknown Armies can only interact with the material world through possession, which is dangerously easy to accidentally cause. Some adepts know spells to conjure demons, but not all know spells that also bind them... As well, demons are actually the souls of dead humans, twisted by death and their obsession, always out to pursue their agendas in the world of the living but often getting sidetracked by renewed exposure to physical sensation. They'll say or do anything for just a little more time. Also the cause of lycanthropy, in a rather complicated and roundabout fashion.
Yu-Gi-Oh!: Because it has no true form of its own, the shadow managed to consume "Hirume" without "Tsukuyomi" noticing, and plot to eliminate its greatest threat, "Susanowo".
Jesus: Wait a minute, didn't I cast a demon out of him before? Father: Yes, but I didn't pay your bill and he got repossessed. (Cue spinning head effect)
In Dragon Quest VIII it is revealed that the antagonist Dhoulmagus is actually possessed by the REAL antagonist Rhapthorne, who possesses many other people throughout the game.
In "Shounen Kininden Tsumuji" it is revealed that the Dark Ninjas were possessed by Demon Ghosts controlled by the Big Bad.
The various Doom games have "former humans", soldiers who were possessed by the Demonic Invasion.
In Xenogears, Miang, a servant of Deus, can possess any woman with her genetic material. Since she's her planet's "Eve", that means effectively any woman. Ironically, the two main characters are using the very same MO to reincarnate themselves over and over: The Irony being that, Elly now has the genetic material of her first incarnation and Miang's genetic material.
Tales of Graces happens to Richard at the end of the childhood arc, and causes him to become the game's Big Bad. This is a special case in that the possession is actually somewhat symbiotic: Lambda is forcibly ejected from Richard's body by Emeraude, but after Emeraude is defeated, Richard asks Lambda to come back and possess him again.
Subverted: the main character's mentor purposefully exposes the main character to possession by Gig, an evil force inhabiting an Artifact of Doom, because she's aware that the main character is strong-souled enough not to be booted out and you need the power from the possession to save the world. Gig is not pleased when he discovers that he's forced to play second-fiddle and power battery to some bright-eyed Heroic Mime he has no real control over — still, sooner or later, you'll draw on too much of his power, and then it's his time to shine...
The New Game+ has the demon path, where you willingly give in to Gig's influence, much to his delight; until you out-evil him.
Raksha bought two slave children then broke them so he could inhabit their soulless bodies...and then he starts to really be a jerk.
In the Kirby series, the Dark Matter is this, even capable of changing the shape of the body currently being possessed.
Ghost Trick's Sissel can possess dead bodies, but only so he can contact their souls. Yomiel, on the other hand, can manipulate both the living and the dead.
The Watchers in Drakengard have possessed the Big Bad. This becomes evident when she starts talking in two different voices, or shades between: her normal, little girl voice, and a foreboding, evil man voice.
Grandia II kicks off with the Wings of Valmar possessing the priestess Elena, taking on the name Millennia and transforming Elena's body whenever she's in control. In time, the arrangement becomes more a case of Sharing a Body instead.
The Phoenix arc of Ace Attorney features spirit channeling, in which a spirit medium allows herself to be possessed by a dead spirit. It's not hazardous in itself, but possession by a vengeful spirit can force the medium to do violent acts. And Dahlia Hawthorne's as vengeful as they get.
Happens in Quest for Glory III: Wages of War, where Demons possess humans and humanoids, and can either chose to remain hidden inside a fleshy suit, or completely morph the host into their original Demon (And Bulky) form.
Jade Empire: One of the supporting characters is a girl possessed by two demons. One of them is a "Heavenly Gate Guardian" who was sent along to aid the protagonist on his quest to restore balance to the world, while the other is his negative double whose thoughts bend towards world domination and human suffering. Your choices in the game determine which demon exhibits control.
In Birth by Sleep it's revealed that that Xehanort, the Big Bad from the previous games, is actually a Keyblade master named Terra, who, like Riku, gave into the darkness in his desire for revenge, thus allowing the original Xehanort, an old Keyblade master, to possess his body, and become the Xehanort that we all know and love.
Nicholai Conrad in Shadow Hearts Covenant gets a nice power boost by making a certain Deal with the Devil. At first, he has a great control over his demon (due to his massive ego), but when he gets captured and experimented on by the Japanese army, he is weakened enough that he is overtaken by Astaroth, the fallen angel of vanity and sloth.
Two characters are possessed by a demon in Phantasmagoria. The original host, magician Zoltan Carnovash, murders his wives under its influence, and is finally killed by the final victim's lover during a rigged stage performance. The forcibly exorcised demon returns to the spellbook from where it was summoned, which another character places inside the small chapel and weighted under a large Bible. Much later, protagonist Adrienne Delaney stumbles upon the chapel and curiously looks inside the spellbook, unknowingly releasing the demon which proceeds to possess her husband Donald Gordon, who starts exhibiting increasingly violent tendencies until the final chapter has him trying very hard to kill Adrienne.
There is a Boss in the Serpentshrine Cavern instance. His name is Leotheras the Blind, and while he's an incredible danger all on his own, There exists an unnamed demon within him that occasionally transforms his body into a Chernabog-like creature and throws spells that can decimate any party member not specifically geared to survive his attacks. When Leo is nearly defeated, the Demon leaves the host, and the raid group has to fight them both simultaneously.
Also in the background, the fallen Titan Sargeras, lord of the Burning Legion possessed Medivh, the next Guardian of Tirisfal and an immensely powerful mage, before he was born. Medivh then opened the Dark Portal, through which the orcs came to the world. However, he was killed before Sargeras could fulfill his plans, causing him to be sent back to the nether without his body, effectively preventing from having further effect on the story.
Grand Crusader Dathrohan/Balnazzar of the Scarlet Crusade. Dathrohan was killed first, but it's explicitly called possession. Wearing a paladin's body has given him lots of opportunity to cause trouble...
Kalecgos, the blue dragonflight youth, is possessed Sathrovarr when you fight him in the Sunwell Plateau instance.
While the Ing from Metroid Prime 2: Echoes aren't really demons (although being extradimensional creatures of darkness, they're probably close enough), they fit this trope as they must possess the bodies of other creatures to survive in our dimension. They open a dimensional portal and come through in a gaseous form, entering the body of a nearby creature and possessing it. The possessed creature will gain a darker colour and become more powerful.
In The Legend of Zelda: Majora's Mask, the Skullkid is possessed by Majora by wearing Majora's Mask. This was a gradual and lighter-in-tone possession, for the Skullkid could still decide most of his actions and he wasn't completely possessed until the night of the final day when the moon comes crashing down.
As with Twilight Princess, Zelda gets possessed because her empty body is kidnapped, so the Evil Chancellor can revive a demon Paper Mario2-style.
The reverse happens, too. Link is about to get his block hacked off by a Phantom, when it suddenly stops dead in its tracks. Considering that the Evil Chancellor has her empty body, that leaves her soul free to take other measures in aiding Link. Put two and two together, kids.
It also happens in the final battle. After Zelda gains her body back, Malladus simply possesses Chancellor Cole. He can't apparently maintain control of his form for long, but then wants to destroy the world in short time that's left.
In TOME, Spirits can possess any body on the ground; effectively raising them Back from the Dead. Gameplay and Story Segregation means there is little difference between a possessed corpse and its original. For clever individuals with a Wish spell, one can create a Familiar Spirit and have it possess anything with a corpse; making that your familiar. Gandalf, the Bonus Boss, anything that you killed with a body that you perserved. One of the classes is "Symbiote" which means you can fuse yourself with any Familiar that doesn't move. One of the Bonus Bosses is a Mold...
In one of the endings of Ogre Battle, the demon Galf possesses your victorious character, ruling the now united continent in your name.
Puyo Pop Fever 2 has Klug transforming into Strange Klug when the demon in the possessed book decides to move in. Some people just never learn that carrying around something like that book is a BAD IDEA.
Roa in Tsukihime has gained effective immortality by switching bodies. Whenever his current one dies, he goes to the next prepared host. In the event he couldn't prepare one in time, he can end up as someone like Elisia aka Ciel who has immense power but not the lineage and wealth he prefers. In a way, though, he's actually already dead as his ego has been reduced to two goals: continue seeking immortality, and apologize to Arcueid, which he doesn't realize he wants to do.
A core player ability in the Dungeon Keeper series, in which you can do this to any creature under your control. Mainly useful for combat, fast scouting, digging and claiming of territory, and in the unofficial expansion, Ancient Keeper to suppress normal emotional responses at key times.
Early on in Muramasa: The Demon Blade, Momohime gets possessed by a demon named Jinkuro, forcing her original soul out of her body. An evil monk then steals the soul to give to a giant demon, and Momohime-Jinkuro has to rush to get it back, because if the original soul is destroyed, then Momohime's body will wither and die, leaving him once again without a vessel.
Tragically done AND gloriously inverted in Arc The Lad II: the Big Bad manage to take control of Kukuru and "absorb" her, only to discover that Arc's Girlfriend's soul is stronger than his own: she promptly inverts the demonic possession and gives Arc the time to seal him again
In Fire Emblem: The Sacred Stones, Lyon has either type two or type four depending on which sibling's path you choose.
In Fire Emblem: Seisen No Keifu (Genealogy of the Holy War)... upon reading the Tome of Eldritch Lore, Prince Julius ends up as an avatar of a Dark God. Irredeemably so, at that through a combination of Type 2 and 3— and this was all set up by the head of the game's Religion of Evil as to unseal the Sealed Evil in a Can... right down to the victim's birth.
Most of the inhuman enemies in Dragon Age: Origins who aren't Darkspawn are the results of Demonic Possession, which is a risk anyone with magic talent faces. Corpses and trees can also be possessed. And those a just the ones the player fights. There is also discussion of a cat that got possessed by a Rage Demon and killed three Templars.
Anders in Dragon Age II suffers from a case of this, though it's not as clear cut as most cases. He voluntarily allowed, his friend the spirit of Justice, to come into his body. Anders' own hatred of his magically inclined brethern's oppression perverted Justice into Vengeance, who's a tad more angry.
In Devil Survivor, Amane is posessed by not only Remiel, an angel, but Jezebel, a demon.
And Nemissa did it before either in Soul Hackers. Kinda subverted in that she leaves when she realizes it's necessary. And the possessee still has pretty much control over herself, limiting how much damage Nemissa can do. Later, Spooky is taken over by Satanael, who later decides to take on the party... by blowing his way out of the victim's body. And he doesn't make it all the way out.
Before Devil Survivor but after Nocturne, the Four Seraphs and Metatron joined in, converting five poor saps into their physical bodies through the Demon Virus and obliterating their memories and personalities, making it a horrific combo between Type 1 and 2.
Early in Wild ARMs 2, an entire building full of people are possessed by demons, including the main character. He manages to stumble over to the legendary sword used to seal away a great evil who happens to be the very demon possessing him and absorbs it into his body, effectively cancelling each other out. This is later revealed to have given him a Super Mode that's at risk of becoming a Superpowered Evil Side. The final battle is a one-on-one fight between the protagonist and the demon inside his own soul.
Sonic Unleashed: you can converse with the townsfolk in the hub worlds, and some of them at night become possessed by Dark Gaia monsters, who make them either depressed, apathetic, or weirdly for some normally serious characters, laid-back and happy. As side missions, you can perform 'exorcisms' on them by flashing them with a camera and then defeating their "demons."
Diablo: Diablo has possessed Prince Albrecht, the Warrior's little brother. And the ending? The player character gets possessed after he got tricked into inserting the dark Soul Stone unto his forehead
Legacy of Kain. While it's not done by the actual demons, the ones who mainly do this are related. It's done to either corpses or unwilling living people. The host is gradually worn out, and can be immediately used up if the possessor decides to transform it.
Wonderfully inverted in Summon Night Sword Craft Story 2 where a demon girl is possessed by an angel girl. The later only comes out when the former goes too far on the tsun side however.
Several characters from Shining the Holy Ark are possessed by evil spirits. Notably the King and one of your former allies. The spirits are mostly invisible but a certain spell can bring them into corporeal form; enabling you to sever their connection to the host and their life expectancy.
In Fahrenheit (Indigo Prophecy in the U.S.) the protagonist is possessed by the Big Bad and murders a man in a diner.
Mithra from Asura's Wrath gets possessed for a short time by Chakravartin in order for him to use her power to regain his true form.
Ao Oni features a spin on the first variation listed above: in Version 6.23, if the Oni kills a character, their dead body is taken over and they transform into an Oni themselves. The most jarring case is probably Takuro, who does it in the status screen. Also, this may be the reason Takeshi kills themselves. It doesn't work.
The protagonist of Messiah. He is an angel, not a demon, but can possess people all the same — it's the game's main gimmick, in fact. It's implied that when possessing, you have access to some of the victim's knowledge and skills, since e.g. in a worker body you can repair and use machinery that "only workers know how to operate". At the end of the game, you get to meet Satan's imps, who can possess people as well.
In Dishonored, Corvo Attano can possess animals (rats are small and quiet, fish can swim through otherwise inaccessible points of entry, hounds run swiftly), and then upgrade the ability to possess humans as well, allowing him to position guards to disable them or walk past security systems undetected. The downside is that it won't last longer than several seconds and controlling human bodies is too clumsy and awkward to do anything with them besides move around. He seems to become incorporeal to do so. Leaving his victim causes nausea in humans and instant death in animals. The power is supernatural, but not demonic - it was gifted to him, no strings attached, by the Outsider.
It is strongly hinted that Cort's Seru is a piece of Rogue, the in-universe analogue of Satan. Where he was once a Well-Intentioned Extremistnote To the extent that he was motivated to help his country win a long-lasting war and generally good-natured, after becoming involved with the Mist, he took a far darker turn in personality and motives.
More generally, any human wearing a Seru in the presence of Mist will be possessed by the Seru and the Mist. The entire plot of the game revolves around eradicating the Mist and freeing the populace of the world.
The Taken in Alan Wake are an army of this, possessed permanently by the Darkness. The Darkness can do a more limited version of this, which was used on Rose, Alan, Thomas Zane, and Cynthia Weaver.
In Something Else, The Miko leader gets possessed by a Big Boo and turns into the boss of World 3.
King Dedede by Dark Matter in the boss fight for DDDark Castle.
Putty has a ghost that turns Bots into demons. The possessed Bots grow horns and explode after a minute.
This trope plays an important role in Ava's Demon. Ava is haunted and frequently possessed by the Demon Wrathia, who causes mischief whenever possible. Wrathia is able to physically control Ava's body for short periods of time, such as when she is forced to flip off the school's principle. Later on, the story reveals Ava is not the only one who has a Demon.
MAG ISA - Demonic possession is standard in this comic:
Reynardine from Gunnerkrigg Court can possess anything with eyes, or a representation thereof. There's elements of Grand Theft Me to his possession: he can't exist outside a body for more than a few seconds, and he permanently dispossesses the host's soul. When he takes a new host, his old one dies.
There's also the Glass-Eyed Men, who at one point possess a robot.
There are a few of these floating around the Sluggy Freelance universe, most notably K'Z'K the Vowelless.
The Dragon Doctors: While initially believed to be an alien, the Crax is later revealed to be the manifestation of a sociopathic man who learned how to become immortal by taking over other people's bodies. Did we mention he's become what is basically sapient cancer?
Drowtales: There's basically two levels of demonic possession. First, there's tainting. This is generally done in a controlled manner, so that the demon will not progress to the next level. It leaves the host in full control, while making sure that she can't be possessed accidentally in a more dangerous manner. Very weak taints can sometimes be reversed. Tainting also is generally used to dull fear and pain. In the full form of possession, the demon has full control, and the host's body commonly deforms. Both forms leave the host with red eyes.
In User Friendly, installing Windows NT on Erwin causes him to become possessed by the spirit of Bill Gates.
Erwin(static on screen): Grglzzzzz mrrrffff Dust Puppy: Erwin!! Speak to me!! Bill Gates(appearing on Erwin's screen): Competition is good. 90% market share is better. Dust Puppy: Somebody call an exorcist!!
In The Order of the Stick, it is revealed that at least one vampire is a demonic spirit possessing the dead body, while holding the helpless soul captive inside, able to watch as the vampire tricks his friends into believing him to be the original. Word of God is that it's how standard vampirism work in this world.
In We Are Our Avatars, Pride was indirectly possessed by Him, who made himself a vessel in the form of a black cat named King in order to get close to Pride. Him then used him to create a philosopher's stone so that he'd have enough negative emotional energy to give him the power to take over the world.
Tech Infantry has the Caal, a long-extinct alien race whose souls somehow stuck around, and tend to possess other life forms. Humans possessed by the Caal are granted supernatural strength and other powers, to the extent that they are described as being able to walk through tanks, but are of course also completely mind-controlled by the Caal.
The Reveal in The Princess 99 shows that the assassin, Axel, had been possessed by a demon she gets better via forcibly removal of said demon.
The Nostalgia Critic gets possessed by the devil in one of his fights with the Nerd, and only Super Mecha Death Christ is able to defeat him.
In The League of S.T.E.A.M.'s webisode, "Dinner with the Devil", Sir Conrad gets possessed after a botched exorcism. As he's the resident demonologist, the rest of the League is in a bit of a quandary.
In Literature/Prolecto, this is Azazel's MO. Sonya is Eviler Than Thou. At least until the climax.
In 20 Haunting Halloween Facts by Matt Santoro, Matt says that he's used a Ouija board many times before, and nothing bad has ever happened to him. He then gets possessed.
Season two of Jackie Chan Adventures had the character Valmont possessed by Shendu, a dragon spirit. The possession, though, was accidental, as Shendu wanted to get into Jackie, at which he later succeeds. Shendu then uses Valmont to further his own agenda while maintaining the upper-hand in their relationship.
in Transformers Prime, Megatron exposes himself to Dark Energon, the blood of Unicron, which allows Unicron to possess him in the first season finale. It's a testament to the strength of this Megatron's will, though, that Unicron had to knock him out before he could take total control.
A heroic example is Raven from Teen Titans she has a Superpowered Evil Side as one lovely feature of her dual nature, on the occasions where it takes control, she's possessed by her own inner demon.
Lauren Faust: Luna was no longer present, jealousy buried her inside NMM.
The outside force bit is confirmed in the comics, where it was the Nightmare Forces that possessed Luna.
Code Lyoko: One of X.A.N.A's favorite attack methods.
Karkull in Superman: The Animated Series wreaks havoc in Metropolis after possessing a petty thief who recites the incantation on a tablet he steals from a museum. Several of his subservient demons take control of characters like Lois Lane and Jimmy Olsen.