Hellish Pupils

"Cuchulainn has FOURTEEN FINGERS AND FOURTEEN TOES
ALSO FOURTEEN PUPILS
WHY FOURTEEN PUPILS?
BECAUSE TWO PUPILS IS NOT ENOUGH TO WITNESS THE SHEER QUANTITY OF HOMICIDE HE COMMITS."

— Cuchulainn is a megatron of killing people, Bettermyths.com

A character's pupils are slitted like a cat's or snake's, or rectangular like a sheep's or goat's, to indicate that they're channeling something nasty (or that they are nasty, period). Often paired with a red or yellow eye color to accentuate the wrongness. Also applies to eyes with such unusual designs that they seem wrong in the worst way.

Curiously, nobody ever seems to notice this if the character isn't a known antagonist. It's a Red Right Hand to identify trouble to the audience.

Sometimes this is the Glowing Eyes of Doom with the dimmer switch turned down.

A subtrope of "Uh-Oh" Eyes. May overlap with Animal Eyes, generally when the eyes of animals associated with evil and sinister motives, or those of animals with strange or unusual eye shapes, are used. Not to be confused with evil school children.

Compare Fireball Eyeballs. Generally unrelated to Wingding Eyes, which are Played for Laughs.

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Example subpages:

• Anime & Manga

Other examples:

Comic Books

• The DCU:
  • The Legend of Wonder Woman (2016):
    • In an example with Animal Eyes overlap, Priscilla Rich's eyes gain slit cat-like pupils after she touches and is disintegrated and reformed by the Heart of Baetylus.
    • The Manticore that attacked Diana as a child had a swarm of pupils in each of it's eyes rather than just one, making it's otherwise human head very unsettling.
  • The Spectre: Spectre sometimes manifests images of skulls where his pupils should be, terrifying those who see him face-to-face.
  • Supergirl: Cosmic Adventures in the 8th Grade: The mischievous reality-warper Mister Mxyzptlk has square pupils and golden irises.
  • Wonder Woman (1942): Queen Atomia's poison green eyes are each split by a thin vertical slit pupil.
  • Wonder Woman (2006): Genocide's "eyes" look like writhing orbs of twisting tortured human corpses, and when Alkyone takes on some of her power Alkyone's pupils look like skulls.
• Marvel Universe:
  • Fantastic Four: Galactus has always had square irises.
  • X-Men: Nightcrawler is sometimes shown with these, but he is the nicest guy! His mother, on the other hand...
• Paper Girls: The first "Alien Invaders" (or so they believe) that the Girls run across have triangular pupils. though it turns out to be a Red Herring as they are actually the good guys, or at least the least hostile faction.
• Sonic the Comic: Super Sonic, Sonic's Superpowered Evil Side, had red spirals instead of pupils. In some stories they seemed to reflect his demeanour; when he was at the peak of his evil powers the spirals were large enough to fill his eyes, but when he was good they shrank noticably.

Eastern Animation

• Suur Toll: Vanatühi the devil has three red pupils.

Fan Works

• The Cartographer's Craft: Peter Pettigrew performs a ritual to immensely increase his power, and his eyes are afterwards described as "yellow, with cross-shaped pupils; a goat's eyes."
• In misakiyu's illustrations of SlifofinaDragon's Sengoku Basara fanfic Finally Home (chapter 1), Toyotomi Hideyoshi's daughter Kagehime "Kira" shows her witchy side, with her eyes being slitted like that of a reptile's.
• The Night Unfurls: In Chapter 8 of the original, right after probing a mook's mind with his tendrils, Kyril's pupils turn into slits as he regards the guards approaching him, clearly intending to walk through what's left of them.
• Past Sins: Nyx has cat-pupiled inherited from Nightmare Moon, because she is Nightmare Moon reincarnated.
• RainbowDoubleDash's Lunaverse: In the non-cannon fic "Nightmares Yet to Come", the bad guys have these, which are gold, and glow... sometimes. The rest of the time They Look Just Like Everyone Else!.
• The Rise of Darth Vulcan: As part of the badass upgrade package he receives from Vulcan and Chrysalis, Artful Dodger's eyes are magically enchanted to increase his natural vision and grant him night vision, with a side effect being that they become cat-like, with slitted pupils and a slight glow.
• Squidward's Suicide is about Squidward getting hyper-realistic red Glowing Eyes of Doom and being told to kill himself before it comes, which he does at the end. The song he plays at his performance is also titled "Red Mist", and for some reason, it gives several audience members the red eyes. The Red Mist phenomenon seems to be named after the red and misty vision/appearance the eyes give.

Films — Animated

• Justified in Rango: Rattlesnake Jake is a western diamondback rattlesnake, so it makes sense for him to have slit pupils. The flaming-red irises certainly aid the hellish look, though.
• Professor Screweyes from We're Back! A Dinosaur's Story. True, his left eye is actually a screw buried deep on his eye socket, but the fact that the screw's slit is in a vertical position (instead of in a diagonal or horizontal one) pretty makes it look like the pupil of a snake or a cat.
• Zootopia: Predators that go "savage" are signified by their eyes reverting to a more animalistic state, either turning dark or having slit pupils. This is a clue to the viewer that Nick is faking going savage in the climax, because his eyes stay normal. The sheep (with the exception of Bellwether) are also depicted with realistic sideways pupils, unlike other mammals which have human-like eyes, which makes them look more intimidating when they're revealed as villains.

Films — Live-Action

• In Aliens, Lance Henriksen wanted to have his android character sport a pair of Hellish Pupils while performing his Facehugger autopsy, but director James Cameron declared that Henriksen's eyes were creepy enough as-is.

• The aliens in Battleship have sensitive lizard-like eyes with slit pupils.
• The Boy Who Cried Werewolf: They're gained by humans close to transforming into a werewolf, as well as vampires, becoming slitted and yellow.
• Due to having a soul no more, Miles Creighton displays these twice in Chiller; first when he wakes up after being brought back from his cryogenic sleep, and when he dies for good in front of his mother in the ending.
• The Master in the Doctor Who movie. The last time we saw him in the series, he was fighting off the effects of turning into a cat-like creature with the same result.
• In Galaxy Quest, Sarris's eyes are yellowish-green with dual pupils (one large one and a smaller one next to it).
• In In the Mouth of Madness, the ax-wielding maniac who attacks Trent early on has eyes with two pupils that overlap one another.
• Employed subtly in Let the Right One In: Eli's pupils turn slitted in the dark and when her inner vampire comes to the fore.
• Thomas Jerome Newton from The Man Who Fell to Earth. Beneath the contact lenses he wears as part of his Alien Among Us disguise, he has reptilian eyes — yellow with slit pupils. He's a Tragic Hero and a subversion of this trope, but it doesn't keep his human mistress from regarding his true form as hideous.
• The Mummy (2017): As part of her Obviously Evil design Ahmanet has two pupils (w/ irises) in each eye.
• The devil mating with Rosemary in Rosemary's Baby is shown to have yellowish cateyes. Their baby is suggested to have inherited them as well.
• Megumi the Yurei spirit does this in the American version of Shutter, she has a scene where her eyes widen and her pupils go inhumanly small. Very creepy effect.
• Evil magic user Zenobia does this in Sinbad and the Eye of the Tiger manifesting feline eyes (for a few seconds) when using her full powers. (She does this twice during the film.)
• Dren in Splice has cross-shaped pupils, as an indicator of her hybrid nature.
• Who Framed Roger Rabbit? has Judge Doom in his Toon form having such scary eyes that they could count as Eldritch Abominations.

Literature

• The Hot Witch in Alchemy by Margaret Mahy has eyes that initially appear normal, but turn yellow and catlike when examined closely. Somewhat surprisingly, she's a good guy—the antagonist is even creepier.
• Beasts Made Of Night: Children are exposed as Sin-Eaters when their Puberty Superpowers activate and their pupils turn white.
• The Chronicles of Thomas Covenant: The Anti-God Lord Foul has sickly yellow eyes "like decaying fangs". It's not entirely clear what is meant by this simile, but it's probably not anything good.
• In Dark Heart, this is the first sign of Myrren Kahliana's dark side emerging, along with her developing magical power.
• The Westfolk (elves) from Katharine Kerr's Deverry novels all have catlike eyes (big irises and slit pupils), though they aren't exactly harbringers of trouble, most of the time.
• The Knife in The Dollmaker has eyes that look like hourglasses. She's not really evil, but she's definitely inhuman, and doesn't have much against a little light murder.
• The Sidhe in The Dresden Files almost exclusively have these, unless they're going to some effort to hide it (it's sometimes a little more ambiguous with ones who were originally human), being almost exclusively referred to as 'feline'. Like cats, the Unseelie/Winter Sidhe are predators by nature and enjoy toying with their prey (to quote the protagonist, "these people think the Saw movies are hilarious"). The Seelie/Summer Sidhe tend to be far less creepy, but even they tend to walk the Good Is Not Nice line and have a serious case of Blue-and-Orange Morality.
• The mage Raistlin from Dragonlance has pupils shaped like hourglasses, a side effect of a magical talent he received when young. Naturally, Raistlin has Supernatural Gold Eyes, too.
• Empire Of Sand has a variant: the Maha looks like a charismatic but normal Silver Fox except for his pupils, which show that the insides of his eyes have a fractured gleam like light on broken glass, betraying that there's an entirely inhuman power within his body.
• Good Omens: A. J. Crowley has yellow, snake-like eyes (six thousand years ago he was a snake, hence the fact that he occasionally hisses, doesn't blink much, and can do 'odd things' with his tongue), hence his Cool Shades. Crowley is a demon who lives in a fantastic London flat, designed the M25 London ring-road as one of his most evil deeds, and drives a Bentley. His shades are pretty damn cool.
• Harry Potter: The Big Bad Voldemort has slit-pupiled, red eyes. They were ordinary brown eyes in his childhood; Harry Potter and the Half-Blood Prince reveals that the change was part of an Evil Makes You Ugly transformation brought on by creating an excess of Soul Jars.
• Mr. Teatime, the psychopathic assassin from Hogfather, has jaundiced eyes with creepy pinpoint pupils. The fact that he only has one eye doesn't detract from this — indeed, his glass eye is described as being the less creepy one.
• Shahmeran in the League of Magi stories has eyes that go vertically slitted like a snake's whenever she manifests her powers (but remains in human form.
• In The Lord of the Rings, Sauron is represented (in visions, and from there as a metaphor) by a great eye, with a slit pupil and yellow like a cat's, and rimmed with fire. In Peter Jackson's film version, of course, that eye was Sauron.
• In the Magic: The Gathering novel Champion's Trial, Kei Takahashi is being transformed into a humanoid wasp. His eyes turn yellow-green with red pupils, which is nasty enough; however, his pupils then begin to divide, over and over, becoming the compound eyes of an insect. Creepy.
• Malediction Trilogy: The Winter Queen appears to human girl Cecile as a perfectly beautiful woman, with glossy black hair, silver eyes, pearly teeth and perfectly manicured rosy nails. However, from time to time, especially when she loses control of her temper, her real nature pushes through her glamour, showing things like claws, pointed teeth and eyes with slit pupils. And she is highly dangerous, planning total destruction of all trolls.
• Percy Jackson and the Olympians: Ares has these in the form of literal hellfire when he removes his Cool Shades. They get hotter as he gets angrier, at one time melting his sunglasses.
• Warren the 13th:
  • Subverted with Sketchy, who looks terrifying in part to his slit-shaped pupils, but turns out to be very friendly.
  • Aunt Annaconda has these to make her look similarly creepy, and possibly to indicate that she's a witch. They're especially prominent during her Villainous Breakdown.
• The Witcher: All Witchers gain catlike eyes during their mutation. This enables them to see in the dark, but also makes them distinctly more badass. And, coincidentally, in bright light as well (Pointed out in-text, when Geralt's pupils turned into thin slits, giving him an advantage in a fight). A cat's eye not only looks cooler, it's simply more awesome.
• A somewhat minor (can The Dragon have a dragon?) villain in the X-Wing Series, the petty crime lord Zekka Thyne, has red eyes with diamond-shaped pupils edged in gold, which reflect light when he's in the dark. The heroes are very happy to take advantage of this and shoot him when he's trying to sneak around. (It happened twice, and one of them even warned him earlier that if he slipped up he'd be tracked down by his "double-diamonds". No one told him about goggles, apparently.) Justified in that he's apparently some kind of Half-Human Hybrid.

Live-Action TV

• Jha'dur from the Babylon 5 episode "Deathwalker" has cat eyes.
• Inverted in the Criminal Minds episode "The Eyes Have It" when a homicidal taxidermist replaces the realistic glass cat eyes of a preserved bobcat with the real eyes of the man who'd brought the animal in to be stuffed.
• Those infected by the Cheetah taint in the Doctor Who story "Survival" develop cat-like pupils. The Master retains these in his next appearance, in Doctor Who: The Movie.
• Crowley, demonic co-protagonist of Good Omens (2019), has yellow slit-pupiled eyes that have sclera or not depending on how snake-like he's feeling at any given moment. Between the contact lenses and the dark sunglasses, one suspects actor David Tennant was doing a lot of his acting effectively blind...
• The Lord of the Rings: The Rings of Power: When Sauron screams in rage at Galadriel, his human disguise slips away to show he has vertically-slitted pupils.
• The Muppet Show: Kermit the Frog obviously isn't evil, but he does have odd horizontal pupils with a bulge in the middle. Real frog species feature a variety of pupil shapes as well as irises often colored similarly to the rest of the frog, meaning that some species do have eyes resembling Kermit's, such as the leopard frog.
• In The Sarah Jane Adventures, the Bane have pupils somewhere between heart- and apple-shaped.
• The Silicates (AIs) of Space: Above and Beyond have crosshair eyes.
• The Wraith of Stargate Atlantis have both the slitted pupils and the yellow iris. And they are pretty creepy. Well, at first.
• Star Trek: Voyager: Members of Species 8472, one of Trek's few completely non-humanoid alien races, have cross-shaped eyes. How nasty are they? The Borg are terrified of them.
• The X-Files:
  • In "Die Hand Die Verletzt", when the teacher-demon-lady-whatever-thing is carrying out her/its rituals.
  • In "Teso Dos Bichos", a rather infamous episode featuring sewer killer pussy cats summoned by a jaguar spirit, a shaman of Ecuador has cat-like eyes as well.
  • Seen at the end of "Terms of Endearment", revealing that the supposedly 'normal' wife of the demon is actually a demon herself.
• The "defiant pupil" in Zoo is a distortion of the left eye's pupil, which all of the unnaturally-hostile animals seem to display.

Mythology & Religion

• Virgil describes Charon as having eyes "like hollow furnaces on fire."

Pinball

• The Devil in Devil's Dare has green pupils with reptilian slits.

Tabletop Games

• Ravenloft: Urik von Kharkov, a darklord who can change into a panther, develops slitted pupils when he gets angry.
• Warhammer: One piece of art depicts a pair of eyes with the eight-pointed star of Chaos for pupils. As a general rule: if you are in the Warhammer world and you see someone with those symbols in their eyes looking at you, it may be time to take a long vacation. And it's probably best if you don't stop to pack.

Video Games

• Catherine likes this trope. Vincent briefly displays rectangular goat-style pupils each time he wakes up from a nightmare, Thomas Mutton has eyes shaped like the spear of mars and the cross from the mirror of venus, and Catherine and Vincent have variants of these in the True Cheater ending.
• Disgaea:
  • Many demons have this. Rozalin of the second game and other members of Veldime's Snow Clan takes it a step further by having white slitted pupils.
  • (Human) Princess Sapphire, from the third game, has white star-shaped pupils. Seeing as she's conclusively off her nut, it would be safe to call them hellish.
• Dragon Age: Origins: Morrigan has cat's-eye pupils and Supernatural Gold Eyes. Unsurprisingly, she's a Token Evil Teammate and a shapeshifter.
• The Elder Scrolls V: Skyrim: During the Dragonborn DLC, Hermaeus Mora (Daedric Prince of Knowledge and Fate) manifests as a singular giant yellowish eye with unusual biconcave pupil somewhat similar to that of a goat. Whilst not necessarily hellish in the sense of being outright evil, his intentions are anything but innocent given the Blue-and-Orange Morality typical of the Daedric Princes.
• Final Fantasy:
  • Final Fantasy VII: Sephiroth, the Big Bad, has the slitted cat-like variety, compounded with those oh-so telling "Mako" eyes. His eyes were always like that, even before he turned bad, presumably because of Jenova's cells. This is especially evident in Crisis Core.
  • Final Fantasy X: Rikku and the Al Bhed people have spiral-shaped pupils. They're not evil, though, just quirky and a tad ornery. Yuna has one eye like this, as she's half-Al Bhed (Rikku is actually her cousin, in fact).
• The King of Fighters:
  • The King of Fighters '96: Goenitz gets slitted pupils before fighting.
  • The King of Fighters '97: When Chris is possessed by Orochi, his eyes become slitted and either red or yellow; however, this is only part of the transformation.

• Klonoa: Klonoa is a heroic example, with catlike slit pupils surrounded by equally catlike golden irises. The pupils have widened somewhat over the course of several installments and spinoffs and currently resemble Sonic the Hedgehog's eyes more than the full-on cat eyes he had in his first game. Then again, Klonoa IS a Cat.
• The Legend of Zelda:
  • The Legend of Zelda: Breath of the Wild: Large deposits of Malice, a toxic substance created as a physical manifestation of Ganon's hatred and evil, can sprout large eyeballs with black scleras, glowing yellow irises, and vertically-slitted pupils.
  • The Legend of Zelda: Tears of the Kingdom: Ganondorf's eyes in his Demon King form have black scleras, glowing yellow irises, and vertically-slitted pupils, just like the Malice eyes in Breath of the Wild. These eyes are also present on high-ranking monsters like Gloom Spawn, Gleeoks, and the Marbled Gohma.
• The Lost World: Jurassic Park allows the player to control multiple characters throughout the game, including three dinosaur characters. The strength of the dinosaur characters' attacks are governed by an "Instinct" meter in the upper corner, which takes the form of an eye. The eye starts off as a green iris with a large, circular black pupil. The character can pick up items to change this, including a Full Instinct item, which makes the eye in the corner a blazing red, with a slit pupil. This Instinct boost causes the player's attacks to be significantly stronger, and the player must kill enemies in quick succession in order to keep the Hellish Pupil, otherwise the eye color begins to transit backwards through orange, yellow, and back to green, with the pupil changing back to a more circular shape. Obtaining Instinct and keeping it maintained is an important part of gameplay, as having full Instinct can make bringing down even the hardest of bosses a matter of only attacks hits, so it really pays the player to obtain the Hellish Pupil and keep it that way.

• Metal Gear Solid: Solid Snake has slit pupils in the Nintendo GameCube remake. However, they only appear in that particular game and he's not terribly evil despite the violence supposedly latent in his genes.
• Persona 4: Humanoid Shadows have these. Once denied by their human counterparts (the last step to being killed by one is to shout "YOU'RE NOT ME!"), they turn into full-out Glowing Eyes of Doom just before the transformation.
• Resident Evil:
  • Albert Wesker's cat eyes, which were first seen in Resident Evil – Code: Veronica. Possible Shout-Out to "Michael Jackson's Thriller".
  • The cover art◊ of Resident Evil 2 features a zombie with yellow slit pupils.
• Sengoku Basara: Date Masamune has slitted pupils (well, at least in his one visible eye), despite being an ordinary human by the game's standards, and though questionably insane he's by no means evil. However he is often referred to as a "dragon", and whether this is to be taken literally or not his design sports a lot of dragon motifs.
• Shadowverse: Nicola's pupils noticeably shrink when he is genuinely pissed.
• Sonic the Hedgehog (2006): Mephiles' eyes after taking on the shape of Shadow the Hedgehog are red, with green irises, and vertically slited pupils. Despite this combined with him not having a mouth and his evil-sounding voice, Silver doesn't seem suspicious in the slightest during their first meeting. The trope becomes even more apparent in Mephiles' crystalline form.
• Tales of Symphonia: If you pay close attention to the skits, you'll notice that Presea's pupils are black while the pupils of the rest of the cast are white. She's not evil though.
• Tomb Raider: Underworld: Lara's doppelgänger has pupils that constantly reflect light like a cat's.
• Touhou Project:
  • The Scarlet Sisters, Remilia and Flandre, from Embodiment of Scarlet Devil sometimes sport red eyes and slitted pupils as part of their vampire package.
  • Nue from Undefined Fantastic Object misses her pupils almost entirely (they're just darker red spots). Despite ZUN being famously bad at character art, he does normally-colored eyes correctly, so much of the fandom accepts this as intentional.
  • Gouyoku Ibun's Big Bad, Yuuma Toutetsu, a sheep youkai from Hell, has horizontally slitted pupils.
• Vampire: The Masquerade - Bloodlines: Beckett has slitted cat pupils and eyes that are completely red — a side-effect of his vampire clan. He is, however, neither a villain, trouble, nor particularly sinister — the worst he'll do is be sarcastic at you.
• The Witcher: Witchers tend to have eyes the slit catlike variety.
• The World Ends with You:
  • The first step of Konishi's One-Winged Angel is heralded with her taking her glasses off as her eyes turn into green cat's eyes. Her monstrous form, appropriately enough, is Tigrus Cantus.
  • Minamimoto's eyes, on the other hand, are constantly yellow and catlike — his form is Leo Cantus.
• Yggdra Union: Nessiah's eyes were probably like this, considering that the one that's in the Gran Centurio has a slitted pupil.

Visual Novels

• The dragon's eyes in Dra+Koi are slitted even as a human. The protagonist thinks they look reptilian.
• Fate/stay night:
  • Rider possesses square pupils, and as they're usually covered in the original game people only realize this right before being Taken for Granite by her powers.
  • Gilgamesh from the same game has slitted pupils and red eyes, Which is a trait all demigods have.
  • So does Lancer; it might be Fate-continuity shorthand for marking out someone who's got divine ancestry; Lancer is Cu Chulainn, ergo his dad is the god Lugh, and Gilgamesh WOULD be two-thirds divine (not sure how that one works...), but he's had his godly-rating dinged by the fact that he really doesn't like the gods very much and is thus his usual, er... charming self at them.
  • Rin has slitted pupils when she's angry. While she is a magus, it's probably artistic license more than any indication of anything abnormal. She has box pupils in Shirou's dreams. As does Rider under her mask. This isn't a coincidence.
• In Marco & the Galaxy Dragon, Marco's eyes morph into reptilian slits during her final confrontation with Astaroth.

Web Animation

• In Babushka: the Movie, the more people that the Impostors Valkyrae and Sykkuno kill, the more scary/inhuman/demonic they start to look. Both Rae and Sykkuno briefly gain slit pupils after their second kills (Sykkuno also briefly has glowing red eyes and slit pupils just seconds before he commits his second murder), and Rae gets permanent slit pupils and Black Eyes of Evil after her third murder.

Webcomics

• Ava's Demon: Unusually shaped pupils are common in the setting, but demon hosts are distinguished by having unusually colored pupils as well. A flashback shows that Odin's pupils changed from black to red after the near-death experience that opened his connection with Pedri.
• Black Haze: Dio Varus has these in his demon form and accidentally in his human form. Unusually for this trope, the sudden change to this is exactly what alerts Rood to the fact that Dio isn't human.
• Commander Kitty: Zenith combines this with Red Eyes, Take Warning when she meets her "sworn nemesis" Nin Wah again.
• The Dreadful: Kit has vertically slitted eyes, to go with her demon girl motif.
• El Goonish Shive:
  • The transformation from normal pupils to this is used here to signal the beginning of Grace's (almost) Unstoppable Rage.
  • Whenever Tedd powers up using his Gauntlet, his eyes turn COMPLETELY black.
• Homestuck: Vriska Serket has one normal eye and one eye with seven pupils, though she considers them to be seven different eyes. It fits the "hellish" part perfectly, since she's the Token Evil Teammate (and considering where she lives and who her teammates are, that's really saying something!) It also fits her "eight" Numerological Motif.
• I'm the Grim Reaper: All reapers have vertically-slitted pupils.
• Last Res0rt: Jigsaw's pupils and irises turn red, with the whites replaced by black, when she really loses her temper. It's one of the signs that she's a vampire, and her powers seem to get a significant boost when it happens. It's not something she wants people to see, though — she's trying to keep the fact that she's a vampire under wraps.
• Satan and Me: Satan, being Satan, has snake-like pupils.
• Tower of God:
  • Urek Mazino, a neutral but freakishly powerful character, has red eyes with pupils that are vertical ovals, if not quite cat-like.
  • The anime adaptation gives Rachel clearly vertical pupils, though they're not actually cat-like either so it's not very noticeable. This seems kind of random since she's about the most ordinary human around. It can be taken to foreshadow that she's far more villainous than she seems.

Web Originals

• The Gamer's Alliance: Shyralis has snake-like slitted eyes, and this disturbing appearance is part of the reason why she was bullied as a kid.
• The Motley Two: Tetras, a descendant of Homestuck's Vriska Serket, has four pupils in total (three in the left eye). Her Numerological Motif is, of course, four.
• Tales of MU: In More Tales of Mu, a dragon is described as having "jagged diagonal pupils".

Western Animation

• Batman Beyond:
  • Several characters get these in the episode "Splicers", from getting animal DNA "spliced" into their own.
  • Derek Powers had this even before becoming Blight. His eyes were black with white pupils.
• Beast Wars:
  • Megatron doesn't just have regular red eyes, he also goes around with reptilian pupils when he's in Robot Mode. This becomes especially noticeable when he goes Transmetal.
  • Gentle Giant: Rhinox gets red glowing slit-pupiled eyes when he is temporarily turned into a Predacon.
• Code Lyoko: The symbol of the AI antagonist XANA is a stylized eye. Humans and animals possessed by XANA have their pupils replaced by this symbol. (It also appears somewhere on all of XANA's monsters in the virtual world, usually as a weak spot.)
• DuckTales (2017): Magica De Spell has triangular pupils. Word of God is that they are the opposite of the other characters' Pie Eyes; that is, the missing pie slice.
• Gravity Falls:
  • The dream demon Bill has one massive, yellow-tinged eye with a slit pupil. Anyone who makes a deal with him and is subsequently possessed also has the creepy eyes, as well as an unnaturally detailed face.
  • Gompers, the Mystery Shack's goat, has similar eyes...which isn't all that unusual for a goat.
• Hazbin Hotel features plenty of characters like this, being set in Hell after all. Many characters have no visible pupils, Cherri's pupil is a yellow "x", and Alastor's pupils turn to radio dials when he goes into his Nightmare Face, made all the creepier by him not blinking when he does this.
• Kipo and the Age of Wonderbeasts: Most of the Mutes have solid-colored eyes with slit pupils, and Kipo developing these reveals her condition.
• The Legend of Tarzan plays fast-and-loose with the works of Edgar Rice Burroughs in many ways. The main example of this trope is Queen La, who is melded with the Leopardmen and given a pair of catlike eyes.
• My Little Pony: Friendship Is Magic
  • Princess Luna's evil persona Nightmare Moon has cat-like green eyes with slitted pupils.
  • Queen Chrysalis of the Changelings has, not one, but two irises in each eye, accompanying the viper pupils.
  • The unicorn Generic Doomsday Villain King Sombra has slitted pupils, red irises and green scleras, and on top of all that, his eyes emit a purple mist.
  • Inverted with Grogar, who has normal pupils despite being a goat, but played straight with his Crystal Ball, which has a goat pupil floating in it while on standby mode.
• Pandamonium: The cosmic villain Mondraggor has catlike slitted pupils.
• She-Ra and the Princesses of Power: Light Spinner, before she became Shadow Weaver, cast a dangerous, forbidden spell, side effects of which include inverted Y-shaped pupils.
• The Spectacular Spiderman: Adrian Toomes the Vulture has comma-shaped pupils, which look particularly odd when he's out of costume.
• Steven Universe: The Diamonds have diamond-shaped pupils.
• Teen Titans (2003): Jinx has narrow, cat-like pupils, but she's not exactly "evil", just fell in with the wrong crowd.

Real Life

• Abnormal-looking pupils in animals include:
  • There are the famous slit pupils common among cats and reptiles. They also show up on some sharks and foxes.
    • Certain gecko species get special mention for having four distinct points along the length of the vertical slit, making them look even more unusual.
  • Goats, sheep, and horses have horizontal, blocky pupils. This can make them creepy looking to some people.
  • Some frogs, snakes, and octopuses have horizontal slit pupils.
  • Wavy, W-shaped pupils are the characteristic of cuttlefishes.
• People who have undergone cataract surgery are often left with keyhole-shaped pupils on the surgical side.
  • A coloboma in the iris can also lead to keyhole-shaped pupils.
• A certain defect in the iris can result in a cat's-eye-like appearance.
• Funny enough, the most dangerous, venomous snakes (the Elapid family), and big cats, have round pupils.
• Tache noir de la sclerotique gives this sort of effect, crossed with plenty of Eye Scream, but actually is a sort of subversion, in that it's the sclera that's hellish. It's generally a side effect of Dies Wide Open, as a result of air getting into the open eyes of the corpse (who obviously can't blink to clear them anymore). Don't look it up if you have a weak stomach or nervous disposition.

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