Until the 2010s and even then some, the only time implied asexual and aromantic people appeared in media was when they were either "broken" abuse victims who needed to be "fixed" or, more commonly, evil villains.
Media which features characters with psychopathic traits often try to play up their inhuman nature as much as possible. Many decide a good way to hammer the point home is to have the character reject all forms of sexuality. It's the norm for humans to feel sexual attraction (or at least romantic attraction), so something must be fundamentally wrong when someone rejects such basic instincts. This trope also enforces the idea of heteronormativity, alongside similar tropes like Depraved Homosexual and Psycho Lesbian.
Villainous Asexual characters often also dismiss friendships, familial relationships, and other human relationships as well. This usually means the villain Hates Everyone Equally. They tend to have a Lack of Empathy as well. Characters might be interested in nothing but their work or might have a near-sexual interest in sadism. If they ever have sex, it's only to further their agenda.
A character must fit at least one of the following criteria:
- The villain is explicitly stated by Word of God to be asexual and/or aromantic.
- Their lack of sexual and/or romantic interest is clearly stated (i.e. they openly show disinterest or disgust for relationships).
- There are moments where sexual and/or romantic interest is expected, but they do not show any (i.e. marrying for political reasons or to spite someone).
All of these are not required, but they must at least have one to truly count. If the subject of a villain's romantic or sexual interests are simply not brought up, then it does not count as this.
Compare with Depraved Homosexual, Psycho Lesbian, and Depraved Bisexual for other villainous takes on non-heterosexual orientations. Contrast with Celibate Hero and Chaste Hero for positive examples of lack of sex, Good People Have Good Sex, Sex Is Good, Even Evil Has Loved Ones (for romantic relationships) for positive portrayals of sex, and Sex Is Evil, Unholy Matrimony, and Serial Rapist for negative portrayals of sex. For villains who, in addition to sex, abstain from other "vices", see Straight Edge Evil. When a villain is asexual due to lacking some or all procreative organs, see Eunuchs Are Evil. Related to Loners Are Freaks.
- In Death Note, Light turns down women left and right including a major supermodel. He only seems to ever date women when they're useful to his schemes.
- Jack Vessallius from Pandora Hearts. The only woman who ever had all of Jack's attention was Lacie, but he never pursued nor wished for a romantic or sexual relationship with her even though he wants to drop the world into the Abyss in her name. Out of curiosity, Lacie once tested how Jack reacted to physical intimacy with her and she got nothing. Furthermore, Jack confessed that his feelings for Lacie aren't based on love, but on addictive obsession and resentment. Jack's inability to feel any kind of genuine love for anyone serves to show how disturbing and twisted he is.
- Despite being infamous as a Depraved Bisexual, Daken is this according to Word of God. He only uses sex as a tool to manipulate others.
- The Joker tends to be portrayed as completely uninterested in sex, only caring about his "jokes" and schemes. While he is willing to partake in sex, he only ever does as part of an Evil Plan, manipulation, or because he wants to make a sick joke about it. For example, the self-titled graphic novel has him rape a woman named Shelly, the wife of one of his henchmen and the book's POV character, Jonny Frost, as a fucked up way of making things "even" between the two after Frost withheld the fact he had a meeting with Two-Face.
- The Makings of Team CRME: Cinder Fall is described this way in this series. Despite the fact that she is perfectly willing to have sex and flirt with others to manipulate them without issue, she states that it never holds her interest. She also explicitly states that she has no desire for love.
- Zistopia: Word of God described Big Bad Nancy Goetz as a "self-serving asexual".
- Aladdin: Jafar tries to force Jasmine to marry him, not because he is attracted to her, but rather to make her miserable (and likely, enter the line of succession). Jafar is not otherwise shown to be romantically or sexually inclined.
- In Perfume, the Villain Protagonist is obsessed with the scents of nubile virgins, though he has no sexual interest in them, or anyone else. He hires a prostitute solely for the purpose of an experiment to capture her scent.
- Vargas from the James Bond movie Thunderball does not drink, does not smoke, and does not make love. Instead, he is a cold, hardened killer.
- Demons in the Bartimaeus Trilogy are asexual but certainly are aware that humans are not often asexual. They use this to their advantage as much as they possibly can, distracting or disturbing the magicians who summon them with various attractive forms that may or may not match the spirit's actual gender (insofar as they have one). Bartimaeus remarks at one point in The Ring of Solomon that his repertoire of forms is pretty well nothing but horrible monsters and pretty girls.
- Dexter: Dexter Morgan is uninterested in sex, but willing enough to keep his wife, Rita, convinced that he's a normal man.
- Codename Villanelle: The titular Villanelle enjoys manipulating people, and using sex to do so, particularly authority figures, but admits that she doesn't really like the act itself.
- In the first season of Dexter, Dexter Morgan claims to find sex "undignified" and intentionally dates a rape victim in order to avoid it. Later subverted as since he does start to care about his family and, by season 3, he enjoys having sex with Rita. Even before he also had an apparently enjoyable physical relationship with Lila, his girlfriend.
- Game of Thrones: In a series steeped in sexual politics, Royal Brat Joffrey Baratheon stands out as being a rather asexual character. Finding talk of sex to be boring, he only really brings it up as him needing to consummate his marriage with whoever his wife will be or threatening to rape Sansa, while showing no indication he'd enjoy it outside of seeing Sansa suffer. When Tyrion hires two prostitutes for Joffrey in hopes it'll calm him down, Joffrey only makes one beat the other up due to enjoying their pain more (and partly to spite his uncle.)
- In the Masters of Horror episode "Incident On and Off a Mountain Road", the albino serial killer Moonface is not interested in "sexual things" according to his longtime and crazed prisoner Buddy. He just enjoys inflicting pain.
- Sherlock: Moriarty fits this trope, only showing interest in any sex to manipulate those around him.
- Implied for recurring villain Lore from Star Trek: The Next Generation: Lore is an android who shares nearly the same design as another android, Data, who explicitly does not experience sexual attraction, though he's also "fully functional" and "programmed in a variety of pleasuring techniques" that he willingly uses when propositioned by Tasha Yar. He also seems to think fondly of their "intimacy" later, however that could be just since she's the only such contact he'd had, and Data wishes to learn more about humanity.
- Highlander: The evil Immortal Kalas. He feigns a romantic interest in Duncan's female companion in the 20s, but that's just so he can get her alone and try to strangle her for revenge against Duncan. Later, he captures Amanda, and basically tells her she's wasting her time using her "not inconsiderable talents" on him. Kalas did spend most of his long life in a monastery, so at the very least, he's accustomed to going without having sex (although that didn't stop a lot of real monks).
- In Leverage, one Black Widow Villain of the Week who runs a group of female grifters who seduce rich bachelors declares that there is no such thing as love. Shes very familiar with techniques that make people fall in love, and seems to only see love as a physical reaction she is immune to.
- Batman: Arkham Series:
- This is possibly true of Dr. Hugo Strange in Batman: Arkham City. In patient interviews he seems particularly detached when talking about the relationships of the inmates and at one point states openly that he's never been in love.
- Batman: Arkham Knight depicts the Riddler as this, showing disgust at human relationships, including Batman and Catwoman's unique relationship.
- In Dark Elf Historia, one of Freylia's missions is to seduce local Mad Scientist Dr. Isaac. Unfortunately for Freylia, Isaac has no interest in sex, but he does have experiments, for which he needs a healthy young woman.
- Metal Gear Solid: Psycho Mantis, FOXHOUND's most Ax-Crazy member, is asexual and rants about his disgust for the biological "need for breed". Unfortunately for him, he's psychic and can't help but pick up on the desires and fantasies of everybody around him.
- In Varicella, the titular scheming, murderous Palace Minister never expresses sexual or romantic feelings for anyone, and mentions at one point that he finds the human body slightly repulsive.
- Demons in World of Warcraft, save the succubi, were once noted to have no particular interest in sex.
- Walter from Because We're Here is a sociopath who does not care whether his fellow humans live or die. He is also the only non-romantic route option, his bio stating that he 'could not be less interested in friendship or romance.'
- Everyman HYBRID: HABIT, the series' main antagonist, is completely asexual and uninterested in romance, being an entity who gets pleasure out of causing others pain, rather than out of having sex. This gets even more disturbing later on when he claims to have raped Nick's mother, amongst other people during his long life, which was done to inflict suffering rather than to derive sexual pleasure, and also to breed himself a strong host to possess since normal human hosts tend to fall apart after being shot a few dozen times.
- Speaking of Slender-series, the Observer from Tribe Twelve claims to be this trope as well. Despite his Ho Yay tendencies when stalking and mocking his victims, he's unable to feel any sort of emotion relating to love or lust. He does however, find Noah's reactions legitimately hysterical.
- "The Golden Touch": In the opening number, King Midas mentions that he has no interest in romance, simply because he Loves Only Gold. While he's not exactly villainous, he is shown to be a selfish Jerkass in this part, before his development later on.
- Queen Chrysalis of My Little Pony: Friendship Is Magic, despite being as close to a succubus as a G-rated cartoon will allow, views The Power of Love as strictly a source of power to make her stronger and balks at the idea of even so much as giving friendship a try. She actually seems completely incapable of actually befriending or falling in love with anyone or anything, and instead operates by either assuming the form of someone's ideal romantic partner or by replacing their true love and then sucking them dry when they love her without so much as a shred of reciprocating their feelings. Even when it's made explicitly clear to her, on numerous occasions, that genuinely loving someone would make her far more powerful than her one-sided love stealing she simply cannot comprehend the idea.
- Scooby-Doo! Mystery Incorporated: Word of God states that Mayor Jones's love of treasure has turned him asexual.
- Wander over Yonder: Lord Dominator has absolutely no interest in pursuing a romantic relationship with anyone, despite not being afraid to employ feminine wiles to manipulate people.