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Yes, they're twins.
This is one of their less
"We like our villains like we like our Book of Genesis: with implied incestuous relationships."
So you have a character who is a villain. He's kicked puppies
, tortured defenseless kittens
, and done everything he can to make sure he has thoroughly crossed the Moral Event Horizon
. What else can you do to show the audience that he is absolutely evil in every way?
You have him engage in certain taboo
activities which are frowned upon by most cultures. Sure, Even Bad Men Love Their Mamas
, but some bad men love their mamas a little
too much, and this adds to the audience's view of the villain as a disgusting, depraved individual who commits evil and unnatural acts on a daily basis.
Compare Brother-Sister Incest
, Parental Incest
, Good People Have Good Sex
Contrast Surprise Incest
for when the people involved may or may not know they are related, although these kinds of villains usually don't care. Can cross over with Freudian Excuse
if it's implied to be rooted in child abuse.
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Anime & Manga
- Pictured above: Hansel and Gretel from Black Lagoon. It's with each other, and they're kids, but this is one of the least disturbing things about them.
- Demon sisters Scanty and Kneesocks of Panty & Stocking with Garterbelt apparently enjoy partaking in strange sexual play involving caviar, figs and goat milk when the mayor isn't looking.
- Akio Ohtori regularly has sex with his sister Anthy Himemiya in Revolutionary Girl Utena. It's both an example of this trope, and an allusion to their nature — incest is rather common among many cultures' gods.
- Miki and Kozue may do the same during their car ride, and Touga and Nanami very nearly do; at best, it's a rather blunt metaphor about each girl's relationship with men now that they've begun puberty.
- Interestingly enough, Nanami, the girl who has harbored a very blatant (and often sexual) crush on her brother, is absolutely horrified when she discovers that Anthy and Akio are intimate.
- Alexis and his sister Augusta in Count Cain.
- In Elfen Lied, Director Kakuzawa's master plan involves Lucy creating offspring with her half-brother. It ends about as well as you'd expect
- Auguste Beau of Kaze to Ki no Uta uses sex to control and manipulate his son, Gilbert.
- Sorath and Tiriel from Shakugan no Shana, squicking Shana in the process.
- The creepy twins Yui Fan and Yui Lan from Full Metal Panic!: The Second Raid.
- Dr. Hagen and his sister Nina in Agent Aika. Interestingly, she was the creepier one in that pairing.
- The Black Beauty Sisters in Mermaid Melody Pichi Pichi Pitch are almost certainly a couple, but it's never made clear whether they're actually sisters or not.
- The Long twins from Twilight Of The Dark Master. Taken to a whole new level of creepy (or hilarious) when you find out that their voice actors in the dub are husband and wife.
- Played for laughs in the Black Butler Hamlet OVA, when Grell/Ophelia gets the hots for Agni/Polonius. Agni thinks it's disgusting, even if he's not related to Grell.
- While never explicitly stated in the manga version of Chrono Crusade, this is hinted at with two separate villains.
- Once Joshua gets Chrono's horns, his resulting insanity causes him to become VERY obsessed with his older sister Rosette, going so far as to tell her once they meet again that he'll destroy anyone that would separate them again. (Understandably, Rosette is horrified at this suggestion.) He also mistook his maid Fiore for his older sister when they first met, and she's later hinted to be something of a love interest for him, and even asks him to call her "sister" again before they part for the last time.
- Aion is generally not shown to be interested in romantic relationships, he's very obsessed with his twin brother, Chrono. He's described as "not being the same" after they parted ways by other characters, and in a flashback he describes the sight of his brother covered in blood as "beautiful." He also appears to be kissing the decapitated head of his mother in one scene near the end of the manga.
- Kill la Kill has Satsuki's mother Ragyo, who molests her daughter on a regular basis. If the flashbacks are anything to go by, this has been going on for a long time. And there is the infamous 'Bath Scene', which serves to establish Ragyo as the main villain and to show part of Satsuki's Freudian Excuse and shift to the protagonist side. Later in the series, she does the same to her long-lost other daughter, Ryuko. And in the same episode we find out that Nui Harime, who is practically Ragyo's foster daughter was also molested by her (although she is the only one who doesn't seem to mind).
- Even though Vampire Knight establishes that pure-blood vampires interbreed, Yuki and Kaname's uncle definitely qualifies. He projects his feelings for his late sister onto his teenage niece. Talk about creepy.
- Johan Liebert from Monster is one of the worst examples in this folder. Despite his twin sister trying to kill him when they were kids, he has unnatural feelings for Anna/Nina. He started stalking her, leaving her love notes, and buying gifts for her. She doesn't feel the same way, obviously, and is more than eager to shoot him again if he were to come near her.
- The behavior exhibited by Maestro Delphine from Last Exile toward her younger brother Dio hints at her having incestuous feelings toward him, though this is never made explicit.
- In Magi - Labyrinth of Magic, Gyokuen married her brother-in-law after her first husband died (considered incest by many ancient cultures) and once her second husband died, she became uncomfortably touchy-feely to her nephew/stepson first prince Kouen, to the shock and disgust of her other children. Kouha remarked that she was always very fond of Kouen and now decided to move on from her husband (Kouen's father) to Kouen himself.
- An obscure Marvel Universe character from the equally obscure Comet Man series knowingly started dating his estranged and unwitting sister as part of a plan to revenge himself on his entire family. While sex was never made explicit, they had moved in together for some weeks before his relationship to her was revealed.
- Andrea and Andreas Strucker, the Fenris twins of Marvel Comics. And then it got squickier after Andrea died. Technically their incest was never confirmed, and Andreas denied it at one point (Well that's not surprising). But the implications are incredibly strong.
- Baron Mordo, archenemy of Doctor Strange, knowingly had a sexual relationship with his his Gypsy half-niece (she was unaware of the relationship) which ultimately resulted in a daughter. Just to make it worse, Mordo seduced her to steal the Book of Cagliostro, a book of spells, and then abandoned her.
- While it was implied throughout the franchise that the family may have been committing incest, the comic The Texas Chainsaw Massacre: Raising Cain outright stated it. After one family member's wife is killed (in part, by him) he nonchalantly states he has plenty of other sisters he can marry, also indicating he and the rest of the family are going to eat the dead one ("Meat should never go to waste!")
- Quicksilver and Scarlet Witch are in a long term relationship with each other in the Ultimate Marvel universe, possibly based on an earlier meme originating in the original comic universe. So much so to the point where Pietro actually gets jealous when Wanda hits on a robot. Although the two of them are more Anti-Hero with Anti-Villain moments as opposed to out and out villains.
- In Alan Moore's Swamp Thing, Abby is unknowingly seduced by her own uncle, the uberevil villain Dr. Anton Arcane.
- Strangers in Paradise has Darcy and, yes, David.
- Many of the villains in Sandman Mystery Theatre are incestuous in one way or another, to the point where you start to wonder about the writer...
- In the Bad Future of Wolverine's "Old Man Logan" arc, Bruce Banner has made a Face-Heel Turn and sired the Hulk Gang with his cousin She-Hulk.
- The Sin City short story entitled Daddy's Little Girl has a rather disturbing example of this. A woman seduces a man but claims that her father does not approve of the relationship, eventually asking him to shoot him. It turns out that the whole thing was a setup. She was sleeping with her father and he apparently gets off by killing people before sleeping with his own daughter.
- The gods are naturally featured in Wonder Woman. Mentioned is their habit of boinking their blood relatives.
- The Flash villain Ragdoll (Peter Merkel) is heavily implied to have sexually abused his daughter, Alex. Later on, it appears that his son Peter Jr. and Alex (both now villains themselves) partake in an incestuous relationship themselves, although a consensual one.
- Inner Demons: You know the subtle Incest Subtext that exists between Twilight Sparkle and Shining Armor in canon? Well, after being consumed by her Queen persona, Twilight stops bothering with either subtlety or subtext, to the point that she imprisons and impersonates Cadence in order to sleep with Shining Armor. And when Shining Armor rejects her advances and sides with the protagonists, Twilight has a full-blown Villainous Breakdown and attempts to kill Cadence in a jealous rage.
- In the Oneiroi Series, a Order of the Stick series of fanfics, Deirdre rapes and kills her father, gets pregnant by him, and then manipulates her brother into having sex. Most of the other villains think that she's going to do the same to her uncle, too.
- In Stand In The Rain, a Percy Jackson and the Olympians fanfiction, the main character is raped by her mentally disturbed half-brother.
- There is a Pokemon Diamond And Pearl Crack Fic in which Saturn and Jupiter have sex regularly even though they're cousins. Mars also mentions having once had sex with her brother, which she thinks of as okay because the ancient Egyptians used to do it. Granted, none of them actually do anything all that evil, except under Cyrus's orders.
- The Immortal Game: Titan, having taken over Equestria, attempts to force his daughter Luna to marry her brother Empyrean in order to solidify the latter's position as rightful acting ruler. It's also later revealed that his wife Terra is actually his daughter as well.
- Given the fact that most Wizards of Waverly Place fics are focusing on Justin/Alex, many of them portray their relationship as wicked and harmful, and few have happy endings.
- In Perfect Lies, Justin has a calm life, a four years old daughter and a loving wife. Then Alex comes and creeps in, destroying it slowly, by alluring him into having sexual affairs with her. And she enjoys it.
- Rather a lot of Harry Potter fanfiction, and for good reason. As noted below, the purebloods are absolutely obsessed with keeping their lineage "pure", untainted by Muggle blood. There's also not that many of them, so sooner or later they're going to have to resort to first cousins, or worse. And some of Voldemort's followers are easily bugfuck nuts enough that they might actually be okay with this!
- In The Awakening of a Magus, it is mentioned that a demon descended line to which Voldemort belongs (along with Draco and Snape; the line doesn't make you automatically evil) once gave birth to twins (normally, those imbued with the demon's power are only born a few decades apart). These twins became lovers, seeing no one else as a proper partner. Eventually, they gave birth to a child so evil that he manipulated them both into killing each other, and then established a Death Eaters like band. The main reason they didn't come to rule is that the child decided to take a different path - him and his followers became the Dementors.
- Much Code Geass fanfic, especially AUs where Nunally and Lelouch are never banished, take the Britannincest subtext to the next level. Schneizel/Cornelia, Cornelia/Euphemia, Euphemia/Lelouch, Lelouch/Nunally, and Schneizel/Lelouch are all very popular.
- Hivefled: The Grand Highblood and the Condesce went out of their way to have children and track them down, against the social norms of their species (who usually never know their offspring), purely for this purpose.
- A classic fairy tale found throughout Europe concerns, in various variations, a wicked older male relative pursuing a beautiful younger female niece or daughter. Thanks to gender taboos of the period, the fathers never undergo the punishments typical of Grimmification even though the stories otherwise condemn his actions. An even creepier variant, "The Girl with No Hands," is, well, nightmare fuel of the worst sort.
- Peter Stumpp of Bedburg (the original werewolf) was described as having sex with his daughter. The authorities made sure to execute her as well.
- In some versions of the Arthurian legends Mordred was the son of King Arthur and his half-sister Morgana (swept under the rug in the musical Camelot but dramatized in the movie Excalibur). However, in an inversion of the usual applications of this trope she seduced him (using a disguise spell) as part of her Evil Plan to avenge his father using a similar to have sex with her mother after murdering her father.
- T.H. White's The Sword in the Stone discusses that it is committing this sin, however unwittingly, that dooms Arthur to such a tragic life.
- Well, drowning all those children may have had something to do with it, too. While this is usually chalked up as Arthur's greatest sin, it's only one of many sins that bring Camelot down.
- N.B.: in the original legends his incest was with Morgause, his other half-sister. Modern versions often just combine this role with Morgan(a) for simplicity. (White's version, though, kept Morgause.)
- In Finnish folktales, the villains, bogeymen and monsters are assumed to have gotten their birth from villainous incest.
- The Bible had Lot's daughters raping him, which allegedly produced the Moabites and Ammonites with whom the Israelites had frequent wars. Many consider this a vilification of these rival tribes. Not everyone is entirely sure what happened between Noah and Ham in a certain tent either. Incidentally, Ruth was a Moabite, so the Davidic line also descends from Lot and his daughters... but only on the female side, so that's alright.
- Caligula with his sisters and Nero with his mother, both in I, Claudius and (allegedly) in Real Life.
- The only reason Nero was ever emperor is that his mother married the emperor Claudius. Her uncle. Claudius was the first man in Roman history to marry his niece and had to change the law to permit the union.
- Agrippina (the niece Claudius married) was also one of Caligula's sisters, by the way. In Paul L. Maier's historical novel The Flames of Rome, Nero's wife chews him out for his part in the affair, specifically pointing out that incest was apparently an old habit with her: "How old was she when her brother Caligula first seduced her, twelve!?" The Julio-Claudian dynasty in its latter years was a major squickfest all around.
- Ikurei Xerius in Second Apocalypse.
- In The Silmarillion, Maeglin lusts after his cousin Idril. His feelings are unreciprocated, partly due to the Noldorin incest taboo, partly because she marries someone else. A series of unfortunate events later, Maeglin betrays the location of the formerly hidden city to Morgoth in exchange for lordship and possession of Idril.
- In The Fall of Númenor, Ar-Pharazôn becomes the last king of Númenor by marrying the late king's daughter against her will. She's his first cousin. Pharazôn's ego and disregard for traditions or basic morality simply made it that much easier for Sauron to corrupt him into Melkor-worship. Pharazôn had no legal right to the throne and marrying Míriel did not actually give it to him. He simply used it as a pretext.
- There are multiple versions of this. In some of JRRT's versions, Tal-Palantír's daughter is infatuated with Pharazôn (who by all accounts was likeable in his youth) and marries him consensually, and hands him the de facto control of the Sceptre. In others, he takes her to himself against her will and seizes the Sceptre with the approval of the general public (who by now were mostly corrupted).
- JRRT vacillated a lot on the consensual-nonconsensual nature of sexual relationships in the larger canon; the parents of Maeglin above, for instance, go from Rape Is Love, to consensual babymakin', to "wifing by force" (which is Tolkienese for "carry her home and put on your rapin' pants").
- Celie's father in The Color Purple, although she isn't really his daughter.
- At one point in Lolita, Humbert Humbert fantasizes about siring a daughter with his adoptive daughter, then a granddaughter with said daughter, and so on. Despite the Misaimed Fandom, Nabokov definitely intended Humbert to cross the Moral Event Horizon.
- Mason Verger in the book but not The Film of the Book Hannibal.
- In his Wold Newton universe, Philip Jose Farmer suggests that Carl Peterson (archfoe of Bulldog Drummond) and his lover Irma (who sometimes posed as his daughter) were, in fact, father and daughter. A later version of the Wold Newton family tree establishes Peterson and Irma as uncle and niece.
- Jaime and Cersei from A Song of Ice and Fire—both major villains in the Iron Throne plotline. Interestingly, for a long time they were the only genuinely loving couple in the series without a tragic ending in sight. Subverted, in that after Jaime's Heel-Face Turn, he's still really only attracted to his sister, and it's not until she turns into a paranoid wreck and runs herself into the ground that the relationship fails.
- Played straight with the Targaryen family, who married brother-to-sister for hundreds of years to keep their blood pure, which resulted in a degree of being batshit insane. Not all Targaryens qualify as villains, but the ones who do tend to do so in grand style—Aerys II's madness was so violently destructive that he overthrew his own dynasty, committing several unpleasant murders which sparked off Robert's Rebellion. There's an in-universe saying that when a Targaryen is born, the gods flip a coin to decide if he'll be great or mad.
- Also Craster and his wives, who are also his daughters.
- Lord Raith of the White Court in The Dresden Files has the habit of raping his daughters into submission, thus amplifying the evil of this trope by making it non-consensual. He kills his sons for being potential "threats," though, despite the fact that this cuts his potential workforce in half and the canonical fact that the Raiths tend not to care about gender when it comes to food. Maybe he decided making the extra sexual slaves would have been too much of a drain, since he'd been cursed to be unable to feed and thus die a slow death via starvation. In the end, it doesn't matter, since it's one of his 'not a threat' daughters that turns him into a vegetable.
- Thomas says that his father's tastes "don't run that way", and there are a few other times when it's implied that the Raiths do have gender preferences when it comes to feeding, even if they're capable of going both ways
- Nicodemus and his daughter Deirdre share an kiss, with tongue. Its implied that they've gone farther than that.
- And The Ass Saw The Angel had an incestuous clan of serial killers living up in the hills. The protagonist's father was a defector from this clan.
- In The Crying of Lot 49, the characters go to see a Jacobean-era revenge play called The Courier's Tragedy, whose villains are an incestuous family of aristocrats vying for the throne.
- Terah Graesin and her brother Luc, from the The Night Angel Trilogy.
- The Ringmaster by David Gurr gets philosophical about this trope—it sets up one of these between a Nazi and his sister, and uses it as something of a metaphor for just how screwed up Those Wacky Nazis were.
- Paradise Lost uses this as part of an extended allegory of Christian beliefs. Satan has sex with his daughter Sin, who sprang out of his head when he came up with the notion of rebelling against God. Their resulting offspring is Death.
- Non-consensual incestuous relationships figure in the backstories of several Dean Koontz characters, such as in The Bad Place, Whispers, Life Expectancy, and What the Night Knows.
- In The Fifth Sorceress, the Face-Heel Turn of Shailiha is made explicit when she makes passes at her captive brother, though she doesn't actually get a chance to rape him.
- In Harry Potter, you can pick a random member of the Black family and find someone, if not evil, at least highly unpleasant who is married to an awfully close relative, Sirius and Regulus's parents being the most obvious, especially with Walburga screeching about mudbloods and "filth of my flesh." The whole Gaunt family, with the exception of Merope, also fits into this, and she birthed Voldemort!.
- In the Black family tree the closest couple actually given are second cousins, which is perfectly legal everywhere - but the close family tree certainly seems designed to highlight the Fridge Logic of insisting on "blood purity". The Gaunts are another matter entirely...
- Often, though, those second cousins are themselves children of second cousins - and so on.
- In The Elenium, it is fairly common knowledge that the late King Aldreas had a sexual relationship with his sister Arissa, though they weren't so much evil as sickeningly depraved.
- ...There's a distinction?
- Yes - it might be disgusting, but given the choice between a King who's porking his sister and a king who's (for example) murdering thousands and skinning puppies, I'd take the incest fellow.
- The "novelization" of the 1980 Flash Gordon included a small scene of Ming and Aura pleasurably reminiscing about the most recent time they had (BDSM-heavy) sex together. .... eeeeeep.
- In the Deryni series, this is one of the signs that Imre is a depraved tyrant, though the tyranny is only by medieval standards.
- The Duet, twin rulers of the Seven Kingdoms in Morgan Llywelyn and Michael Scott's Arcana series.
- Duchess Alicia in The Waters Rising by Sheri S. Tepper clearly lusts after her father who, unknown to her is not actually her father and has relations with her half-brother and the Old Dark Man who actually is her father, although she thinks he might be her grandfather.
- Leo Friend, one of the villains in Tim Powers' On Stranger Tides, lusts after Beth Hurwood as a surrogate for his own mother. Technically applies to Beth's father, who plans to oust Beth's spirit from her body so her mother's ghost can move in, although he's so out of touch with reality that the incestuous implications may honestly never have crossed his mind.
- In the Lymond Chronicles by Dorothy Dunnett, the arch-villain Gabriel has a relationship with his sister Joleta.
- In the Vorkosigan Saga, Richars attempts this on a 12-year-old Lady Donna.
- Common in the Alex Delaware novels by Jonathan Kellerman.
- In Mercedes Lackey and James Mallory's The Obsidian Trilogy, Demon Queen Savilla and her son Zyperis frequently engage in sexual activity and express how attractive they find each other.
- Matthew Lewis both plays it straight and subverts it in The Monk. Played straight when the title character, Ambrosio, driven by his lust for the innocent Antonia tries and fails to seduce her then he rapes and kills her. The Devil was after his soul. Subverted when he learns to his horror that Antonia was his long lost younger sister. It's too late by that point because the Devil had convinced Ambrosio to sell his soul to him in order to escape punishment for Antonia's rape and murder.
- Robin Mc Kinley's Deerskin is built on this trope. When his wife dies, he promises to only marry someone as beautiful as she. Should have included a "kin excluded" clause. The rest is nothing short of mortifying.
- In Red Iron Nights, the serial-killer curse was created by a long-ago evil sorcerer who'd been rejected by an equally-evil sorceress, in favor of her own father.
- Marik of Gundar never actually has sex with his long-lost (heroic) daughter, but he's not above seducing her into thinking him harmless and attractive with the help of demon-made charms. She doesn't know he's her father at the time, but he definitely thinks it's possible and doesn't even hesitate.
- In Dracula by Bram Stoker, the eponymous vampire has three companions called "sisters": one blonde and two brunettes. The two brunette vampires are described as having facial features similar to Count Dracula. Meanwhile, the blonde bride is described as having authority over the other two. Many readers have speculated that the blonde bride is the mother of the two brunettes, and that Dracula is the father.
- In Elric of Melniboné, the Evil Prince Yyrkoon is described as "openly lusting after his sister Cymoril." Apparently it's justified (among other things) by norms that allow incestuous royal marriages, but even the decadent Melniboneans feel it's slightly wrong for Yyrkoon to look forward to marrying his sister. Cymoril is also a Love Interest for Elric, and though Elric and Cymoril are cousins, this is not presented as wrong.
- As the SPQR Series by John Maddox Roberts gives Historical Villain Upgrades to Publius Clodius Pulcher and his sister Clodia, the protagonist regularly assumes that their relationship is sexual, as their enemies claimed in real life. For their part, they deny it.
- Malus Darkblade comes from a Big Screwed-Up Family of sadistic, treacherous, power-hungry monsters (or just Dark Elves for short), and the incestuous relations between the siblings is the least of their misdeeds. Oldest brother openly consorts with his sister, when he's not in the high seas pillaging, youngest brother lusts for the same sister, and Malus himself shares the bed with his half-sister.
- In Dune Baron Vladimir Harkonnen openly ogles his nephew Feyd-Rautha (which both movie and miniseries played up for all its worth) and he also harbors an attraction to Paul Atreides who, it turns out, is his grandson.
Live Action TV
- Brother Justin from Carnivàle and his sister Iris have a very, er, close relationship with each other. And did we mention he's father of the Anti Christ?
- And then it turns out that Sofie, the Crowe's new maid — after they lost the last three to, er, Justinnote — is actually his long-lost daughter. Which, through a convoluted series of events, only Iris actually realizes, and, despite Justin being all over the girl, hasn't actually told anyone yet. Worse yet: Word Of God said that if the series had continued, Sofie would have married Justin and had a child. Although it wouldn't have been clear whether the child was Justin's or Ben's.
- The X-Files episode "Home."
- Battlestar Galactica: After erasing her true memories, John Cavil knowingly fraks the scientist who considers herself his mother and created him in the image of her father for extra squick.
- The League of Gentlemen. Although it's not revealed until partway through season 2 that Corrupt Hick Serial Killers Tubbs and Edward are brother and sister, it doesn't really come as much of a surprise.
- Wiseguy. Arms dealers Mel and Susan Profitt.
- In House of Cards (UK), it's subtly hinted that Francis Urquhart secretly wants to do this. After the elderly Urquhart begins an affair with the young Mattie Storin, and she starts calling him "Daddy," he tells her, "I always wanted to be a father of daughters."
- Divia in Forever Knight, a child vampire who turned her father, proposed this rather forcefully to him. His refusal involved a wooden stake.
- Blue Heelers pulls this a couple of times, one where a father shoots his own daughter because he wanted to keep her to himself. Another had recurring psycho Luke Darcy rape his own grandmother in his final appearance.
- On Buffy the Vampire Slayer, part of Spike's back story is that he was a momma's boy when he was alive, and that after turning into a vampire he spread it to her so that she could live forever. However, losing her soul sort of made her a less friendly person, and she mocked him by claiming that he wanted to go "back inside," trying to seduce him. Spike was so freaked out that he staked her. The fact that she was named Anne, which is also Buffy's middle name, is not coincidental.
- A more metaphorical example in the Buffyverse would be vampires in general; Darla sired Angelus, and they were a couple (as well as villains) for several hundred years; Angelus sired Drusilla, who calls him "daddy" at one point but also "my Angel" - and they have definitely slept together; Drusilla sired Spike ... Apparently some vampires seek out people to turn into their eternal partner, but since that involves "siring" them, it could be seen as a kind of incest.
- Spike also refers to Angel as his "grandsire" at one point. And, according to Word of God they have slept together at least once.
- Added to William and Regan Hamleigh in the miniseries adaptation of The Pillars of the Earth, because apparently they weren't villainous enough already.
- In a 2010 episode of Law & Order: Special Victims Unit, a pedophile maintains the perfect cover by leading an activist group that works to expose and shame known sex offenders. It's revealed at the end of the episode that his Start of Darkness was raping his nine-year-old sister when he was a teenager.
- Jim Profit, Villain Protagonist of Profit has a sexual relationship with his mother, although she is his stepmother and they are not actually related by blood.
- Vincent/Valerie of Passions, the intersexed child of Julian Crane and Eve Russell, rapes his half-sister twice, has an affair with his uncle Chad, and seduces his own father and becomes pregnant by him. This last situation prompts the immortal line, "Have your baby so I can get back to drinking," as said by Julian to his child/lover as Vincent delivers their offspring.
- Game of Thrones: Twins Cersei and Jamie Lannister's sexual relationship is at the heart of much of the plot.
- On The Borgias: there is a lot of Incest Subtext between Cesare and Lucrezia, but it's treated more as pure love than sexual chemistry. That said, Cesare is most definitely a Villain Protagonist, and his obsession with Lucrezia has led him to murder once already. In season 3, they have sex and Cesare's fixation on his sister leads to him murdering her husband and declaring Lucrezia "his". When someone makes a sarcastic comment about how much he loves his sister, he only replies, "too much".
- The evil Earth-2 version of Clark on Smallville (in a universe in which he was found and raised by Lionel Luthor instead of the Kents) has a sexual relationship with his adoptive sister Tess. Although it's a case of Not Blood Siblings; they were raised together since birth and he refers to her as "sis."
- Played with in the Adam Adamant Lives episode "The Doomsday Plan". When Doctor Mort's daughter kisses him in a most un-daughterly fashion, Adam is clearly shocked and objects that he is is her father. The girl then laughs and says she is not really his daughter, but that she just plays the role as the public has expectations.
- The Dungeons & Dragons supplement the Book of Vile Darkness introduces the Horny Devil Fierna the Lord of the Fourth Layer of the Nine Hells and her father, the former ruler of the Fourth, Belial. Their relationship has continued into the Fourth Edition.
- Zaiden, the most powerful cleric to the demon lord Yeenoghu, murdered her mother and took her father as her mate. At least for a little while. When she got bored of him she killed him too.
- In Vampire: The Masquerade, one of the 13 vampire clans are the Giovanni. In addition to being necrophiliac Necromancers and members of The Mafia, they are also one big extended family...and really, really dedicated to "keeping it in the family".
- Then there are the spiritual descendants, the Sangiovanni bloodline, in Requiem, who are just as devoted to necromancy, necrophilia, and inbreeding.
- Kara no Shoujo. The overall attitude isn't that the incest is inherently wrong (though there is no sexual tension with the protagonists little sister) but that only the mentally unstable would do such a thing.
- Warhammer's Malekith, Witch King of the Dark Elves, has long been rumoured to have an incestuous relationship with his mother, the Hag Sorceress Morathi. Though this has never been confirmed, and given that Malekith has been sealed within his magic armour for the last six and a half thousand years it is unlikely that anything too physical could have happened anyway.
- Antiochus and his (unnamed) daughter in Pericles. For some reason, her Engagement Challenge is a riddle whose answer is "Antiochus and his daughter are committing incest." They receive a Karmic Death when Apollo blows them up.
- Not a conventional Engagement Challenge, though - they're usually honoured even when they're meant to be impossible, but Antiochus hasn't the slightest intention of honouring this one. The terms of the challenge mean that getting it wrong equals death, but it's made very clear that, for the sake of the king's own safety, getting it right ALSO equals death.
- Shakespeare's Richard III plans to secure himself on the throne by marrying his niece (the daughter of Richard's brother, King Edward IV). In the play, he has his wife killed so that he can do so, although in history she seems to have died of natural causes.
- In Hamlet, the primary villain Claudius marries Gertrude, his brother's widow. While this is perfectly acceptable and even expected in some cultures, some Renaissance Europeans believed married couples to truly be one flesh, and therefore considered siblings-in-law to be equivalent to full siblings, and saw this as incestuous.
- Not that this stopped e. g. Henry VIII from marrying the widow of his brother Arthur with the Catholic Church's assent. Though he later used it as an excuse to divorce her.
- For the above note: that marriage and the one in Hamlet, though politically viable were considered morally wrong.
- Done by the Villain Protagonist of Gibo during the plot, and has an ending devoted to this.
- Suggested to have happened between Lord Irving and his sister in Wild ARMs 2, and she wasn't exactly consenting to it, either.
- Shinji Matou of Fate/stay night has repeatedly raped his adopted sister, Sakura. In one of the game's routes, this comes back to haunt him in a big way.
- The residents of Andale in Fallout 3. It says a lot about the world of Fallout that the incestuous family tree isn't the town's Dark Secret.
- BlazBlue resident jerkass Jin Kisaragi has so much creepy Ho Yay subtext with his brother, Ragna The Bloodedge that it strains the limits of a T-rated game. And if that's not enough, his theme music is titled "Lust Sin."
- This is made fun of a lot in the games' story mode.
- And then in Ragna's ending, there's v-13, a clone of his sister, penetrating him with a sword with all sorts of suggestive dialogue.
- One of the major villains in F.E.A.R., Harlan Wade, plays the Evilutionary Biologist and donates his own DNA (along with that of others) for use in impregnating his own daughter in hopes of producing children with powerful psychic abilities. Another villain, Aristide, calls this development 'sick'.
- Heavily implied between the twins Alexia and Alfred Ashford, antagonists of Resident Evil: Code: Veronica, especially on Alfred's part.
- Also heavily implied between the antagonists, the Scissortwins, and the Big Bad Dick Hamilton to both his daughter Nancy and granddaughter, the protagonist Alyssa (who looks like her mother), in Clock Tower 3.
- Warden Darling in The House Of The Dead Overkill.
- Fire Emblem: Genealogy of the Holy War, has this. Arvis and his half sister Deirdre. In fact its a major point in the Big Bad's plot to have the two marry and breed, so he could create a vessel for a Dark God. And it happens. To be fair, by that point not only neither knew it... but Deirdre was Brainwashed and Crazy. Arvis did find out eventually, but he'd gone through such a Trauma Conga Line by that point that he was far beyond caring. (And their Dark God Vessel Kid was already born, with his twin sister as the inheritor of another bloodline and on the side of good.)
- OTOH, other incestuous relationships aren't seen in such bad light. Raquesis was in Unrequited Love with her half-brother Eldigan, whereas Claud and Sylvia are hinted to be either long lost siblings or distant cousins, and they were all good guys. In the second generation Lester and Lana can marry their cousins Patty and Faval (with the bonus that their moms, Aideen and Briggid, were identical twin sisters), while Larcei is one of the most likely suitors for her half-cousin Shanan and Raquesis' daughter Nanna can potentially marry Eldigan's son Ares (which is actually how the player gets in-game confirmation of how Raquesis really felt about Eldigan), and they're all on the side of good too.
- City of Heroes: Tyrant and Dominatrix (Evil Counterparts to Statesman and Ms. Liberty) had Grandparental Incest behind the development team's back. It has since been Ret Conned out of the story, after it was pointed out.
- It was vaguely hinted at to be happening - largely for Squick reasons - back when the Praetorians were simply Evil Counterparts to the signature heroes. Now that they're morally ambiguous and important characters in their own right, it would be out of place.
- Used in Assassins Creed II, which repeats its predecessor's habit of giving each assassination target a Kick the Dog moment just to reassure you it's okay to kill them. This is one of the black marks against the Big Bad Rodrigo Borgia, who is implied to have a sexual relationship with his daughter. Confirmed in the sequel, with the villainy extended to his son, Cesare.
- Cesare and Lucrezia in Assassin's Creed: Brotherhood; the game even opens up with them kissing during the assault on the Assassin's compound. When Cesare is arrested for his crimes, one of them listed is incest.
- No More Heroes: At the end of the game, Travis (a very dark antihero, borderline Villain Protagonist until Character Development kicks in towards the end and in the sequel) discovers that Jeane (the Final Boss, not his pet cat), the girl he's been searching for and was once romantically involved with is his half-sister. Travis is as squicked out as the player is. Jeane, on the other hand, doesn't seem to mind that it happened. In the end, the two reconcile right before Travis kills Jeane.
- In the Interactive Fiction story Anchorhead this is the dark secret of your husband's family.
- In Project Justice, Kurow Kirishima onesidedly lusts after his beautiful older sister Yurika. Made even more obvious in the Darkside Student Council path which is fron Kurow's POV and in Kurow's ending, when he's seen caressing his brainwashed-into-subservience-to-him older sister's hair...
- * It is very implied between Weiss and Nero from [[Video Game/Dirge Of Cerberus]]. And at the ending Nero merges with Weiss to free him from Hojo, making them become one.
- Thomas, Nicole's dad in Concession is a supervillain, he also regularly has sex with his son. Though in a strange case the comic shows this as if it's a positive thing.
- In Fey Winds, two members of Sigurd's Minionz, Hansel and Gretel apply.
- Yet another rape trope for Drip in Jack. The Anthropomorphic Personification of Lust is being punished for his sins in part having to pleasure his grandmother the way he did "when [he was] little.". Later, it's revealed that Drip had sex with his daughter Lita. He knew the relation, she didn't.
- In Friendship is Witchcraft, Twilight Sparkle cements her place as the Big Bad of the series by sabotaging her brother's wedding, imprisoning his fiancee in a cave and leaving her to die, and marrying her brother herself. She tries to justify her crush and marriage to her brother by saying they are Not Blood Siblings. It's still pretty creepy. And before anyone asks, by all appearances her brother has been brainwashed into going along with it.
- Obscurus Lupa doesn't understand why this is averted in Witchcraft, which features a pair of lovers reincarnated as a mother and son.
"My question is, why did John and Elizabeth need Grace [to have John's baby]? I mean, let's not pretend the mother-and-son thing would bother them. They're evil and stuff, why not cut out the middle man?"
- Though in the sequel, Elizabeth's ghost is trying to have sex with John's baby (her grandson), and Lupa is both Squicked and confused by how casually it's portrayed.