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Red Eyes, Take Warning

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Tak: I'm Tak of the Pupununu People. You are the good guys aren't you?
SpongeBob SquarePants: Sure! It's the beady red eyes that are a dead giveaway for the evil fellows.
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An easy way to tell a villainous (or sinister) character apart from the protagonists, other than giving them a Red Right Hand, is making their eyes red. If they don't start out evil, there's a chance they become so over time or perform full-blown Face–Heel Turn. It's not the same thing as the "red eye" phenomenon in photos, but if cameras could detect evil, or danger these would be the first people they'd catch.

Even those who aren't truly evil or dangerous are often thought to be so by characters In-Universe.

In the progressive algorithm of "Uh-Oh" Eyes we have:

Supernatural Gold Eyes < Red Eyes, Take Warning < Hellish Pupils < Glowing Eyes of Doom

Those with glowing red eyes are almost without exception thoroughly evil or, at least, very dangerous. The "almost" section goes to those whose red eyes serve as a marker for their Elemental Powers, typically fire. Albino characters with red eyes may suffer from this association with evil; see Albinos are Freaks.

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A subtrope of Technicolor Eyes. Compare Glamour Failure and Red Is Violent. Contrast Red Is Heroic.

Not to be confused with the film Red Eye or the liquor. Sometimes a part of Burning with Anger, and thus a harbinger of wrath.

It should be noted that this trope is NOT just for characters who have eyes of this colour, but when the colour actually indicates the character is evil or dangerous, or presumed to be because of their eye colour. Please do not add characters who just happen to have eyes of this colour without the proper reason behind it.


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    Asian Animation 
  • Happy Heroes: In the last episode of Season 8, Huo Haha's pupils turn red when he finally has all of Xiao Haha's magic staffs and becomes much more powerful with them.
  • In the Lamput episode "Signs", when the police officer has finally had enough of Fat Doc and Slim Doc disregarding the "no [whatever]" signs they come across one too many times, his eyes turn red.
  • In Pleasant Goat and Big Big Wolf: Joys of Seasons episode 6, Tibbie's eyes turn red when she gets angry at Weslie, Paddi, and Sparky for accidentally covering her in fire extinguisher foam.
  • In the Simple Samosa episode "Sumo Momo", when Samosa is fighting Sumo Momo and finally snaps from him breaking the tip on his head, his pupils go red as he gives him a No-Holds-Barred Beatdown.

    Comic Strips 
  • These aren't a constant for any character in Candorville, but most vampires can activate and deactivate them at will. The only exception so far is Saxon, who gets Milky White Eyes either because of his Dhampyr status or because he's a Friendly Neighborhood Vampire.
  • Garfield's art style usually doesn't allow for eye colors at all, but the infamous "abandoned house" sequence (beginning here) has a close-up of one of Garfield's eyes in the final strip, red like blood, with the pupil contorted into a spiral as he refuses to accept what he sees.
    • Another very early strip around Halloween, Garfield explains that around that time cats become bewitched. His eyes began to turn red among other things... that is until he saw himself in the mirror, screamed turned white and passed out.
  • Al Capp's Li'l Abner strip had the Nogoodniks, which were the evil version of the Shmoos. They were a sickly shade of green and had "li'l red eyes". They devoured "good" Shmoos, were the sworn enemies of "hoomanity," and wreaked havoc on Dogpatch.

    Fan Works 

    Films — Animation 
  • The Fabrication Machine and all its robot minions in 9.
  • Disney Animated Canon:
    • Mrs. Jumbo from Dumbo normally has blue eyes like her son, but they turn red during the scene where she loses her temper and lashes out at the children making fun of Dumbo, resulting in her being tied up by several circus workers and subsequently being dragged away to be locked up in solitary confinement as punishment for being a "mad elephant".
    • Pongo and Perdita from 101 Dalmatians when they are fighting Horace and Jasper in Hell Hall. Cruella De Vil's Nightmare Face in her final attempt to kill the puppies also counts.
    • In The Black Cauldron, the Horned King's eyes go angrily crimson after his army of undead warriors has been halted.
    • In The Little Mermaid, when discovering that Ariel had failed to turn up for her debut in the concert, King Triton growls out her name in extreme fury while his eyes turn to a bloody shade of red.
    • Aladdin. While Aladdin and the Genie are in the cave, Aladdin taunts the Genie about the limitations on his wish granting abilities to trick him into getting everyone out of the cave without using up a wish. When the Genie gets angry and starts giving a speech, his eyes turn red momentarily.
    • In Treasure Planet, Silver's cybernetic eye is usually a yellowy-amber-orange-ish colour, but it changes to red when he gets angry/displeased.
    • Fidget, when he breaks through the window in the beginning of The Great Mouse Detective, has Red Eyes. Ratigan also qualifies during the climax of the film, after his Villainous Breakdown.
    • Fun and Fancy Free: During "Mickey and the Beanstalk", Donald's eyes turn red when he starts to go mad with hunger. Later, when Willie the Giant wakes up from his nap to catch Mickey, Donald, and Goofy making off with the singing harp, his blue eyes briefly flash red before he gives chase.
    • In the Pecos Bill segment of Melody Time, as Slue-Foot Sue tries to ride Bill's horse Widowmaker, who is jealous of Sue, his eyes turn red as he gives her a ride she will never forget.
    • The bear in The Fox and the Hound has these kinds of eyes, as does Tod moments earlier when he confronts Copper and snarls viciously at him.
    • In Big Hero 6, when Hiro finds out that Callaghan caused the death of his brother and apparently has no remorse for it, he removes Baymax's caregiver memory card and leaves him with only the combat information, rendering him a remorseless attacker perfectly capable of killing without hesitation, his eyes glowing red.
    • The Adventures of Ichabod and Mr. Toad. As he pursues Ichabod Crane, the evil supernatural Headless Horseman rides a diabolical steed with red eyes.
  • In Care Bears Movie II: A New Generation, Dark Heart has red eyes (and hair and clothes) in his human form. When his eyes change color, it clues everyone in that his Heel–Face Turn turned him into a normal kid.
  • Darla Dimple in Cats Don't Dance has eyes that flash red when she's feeling particularly insane.
  • Heavy Metal:
    • "Den". The evil queen's eyes flash red for a moment when one of her underlings criticizes her having sex with a prisoner.
    • "Taarna". The giant rats that the Barbarian Leader has as his Right Hand Cats have bright red eyes.
  • Heidi's Song: All the evil rats have red eyes. Even lampshaded in their Villain Song:
    "And 'E' is for your evil eyes of red!
  • The victims of Klaus' possessions in Hold Your Breath sport glowing red eyes.
  • In Hotel Transylvania 3: Summer Vacation, when Abraham Van Helsing uses his music to control the Kraken, its eyes burn bright red.
  • Rudy the Baryonyx from Ice Age 3, although this is more from albinism.
  • When the titular Iron Giant's eyes turn red, it's a good idea to remove yourself from the area.
  • Lord Shen, the Big Bad of Kung Fu Panda 2, has red eyes, due to him being an albino peacock.
  • Nyra's eyes in Legend of the Guardians: The Owls of Ga'Hoole glow red when she's angry.
  • A majority of the Outsiders from The Lion King II: Simba's Pride have a brighter red tone to their eyes than the Pridelanders. Kiara's and Simba's orange-brown eyes are softer.
  • The PNK sorority girls in Monsters University. They're usually bubbly valley girl types, but when they get down to scaring, yikes.
  • Spoofed in Monsters vs. Aliens. After being imprisoned by the military merely for being a 49 foot 11 inch monster woman, Susan starts banging on the walls of her prison. The other monsters warn her not to do that, whereupon a huge door opens to reveal a dark interior with two glowing red eyes within...which merely turn out to be the lights on General Monger's Jet Pack.
    • Played straight with the alien probe. When its eye turns red, there's little hope for you if you're in its way.
  • In The Pagemaster Mr. Hyde has red eyes.
  • The Penguins of Madagascar: Operation Blowhole provides a lampshaded example when the Julian doll's eyes start glowing red.
    Skipper: Glowing red eyes, that's almost never good.
  • In Superman vs. the Elite once Superman decides to fake crossing the Moral Event Horizon, not only do his eyes glow red. The blood vessels in his left eye were damaged earlier in the fight, giving that eye a reddish tint, which only adds to how shit-scary he is at the time.
  • In The Thief and the Cobbler, all of the One-Eyes (an evil race that plans to destroy an idyllic Golden Land) have a single, big red eye.
  • Toy Story 2. Buzz Lightyear's archenemy the evil Emperor Zurg has glowing red eyes.
  • Lord Kuruku from Unico in the Island of Magic has red eyes.

    Films — Live-Action 
  • The Infected in 28 Days Later have red eyes. They're also very aggressive.
  • The HAL 9000 computer in 2001: A Space Odyssey uses cameras with glowing red lenses to watch the crew of the Discovery.
  • A rare yellow colored variation of this trope happens at the end of Angel Heart when Louis Cypher is telling Harry Angel that he was the missing cannibal serial killer Johnny Favorite and that Johnny's (And therefore, Harry's) soul is his, for a brief couple seconds, his eyes turn yellow.
  • In Apollo 18, one of the symptoms of the parasite infection is a red ring around the host's irises.
  • Brightburn: Brandon's eyes turn red when he's about to use his laser vision.
  • The demonic halfbreeds in Constantine.
  • Cthulhu: "Do it, Russell! Make sacrifice! Look into the red eye of your god!"
  • Dark Angel: The Ascent: Veronica's eyes turn red every time she gets angry, revealing her true nature as a demon.
  • In Dreamscape, the Savage Wolves chasing Alex and the President in the final dream sequence have red Glowing Eyes.
  • The Fog (1980). Blake, the leader of the zombie ghosts, has glowing red eyes.
  • Vampires in Fright Night (1985). Jerry Dandridge and Amy Peterson in their humanoid forms, Jerry Dandridge in bat form, and "Evil" Ed Thompson in wolf form all have red eyes. Hammer Horror vampires often have red — or rather, very bloodshot — eyes.
  • Ghostbusters:
    • Gozer's dog demons Zuul and Vinz Clortho both have glowing red eyes.
    • After Tully is possessed by one of the dog demons, his eyes flash red when he becomes angry. Dana Barrett's eyes also become red after she is possessed.
    • While in his female human form, the evil deity Gozer the Gozerian has red eyes.
  • Voldemort in Harry Potter and the Philosopher's Stone, staying true to the original story. Later films were much less accurate, giving him Creepy Blue Eyes, according the creative director this was to give an Uncanny Valley affect as Voldemort is more appalling if there's still a trace of humanity in his face. This idea works, especially in Goblet of Fire.
  • Monster X in both forms in Godzilla: Final Wars.
    • In Godzilla Tokyo SOS, the title character tries to charbroil Mothra's newly borne twin larvae with his atomic breath. Mothra jumps in front of her children to save them and is promptly set alight for her troubles. She explodes and, at that point, her children's eyes turn from a benevolent blue to a hellish red and they proceed to team-up with Mechagodzilla to beat the hell out of Godzilla.
    • Space-Godzilla has glowing, red, eyes with cat-like slits as opposed to Godzilla's fiery, human-like ones.
    • Others include Battra, Hedorah, Gigan and King Ghidorah.
    • The Mutos from Godzilla have red glowing slits for eyes, which lack any kind of pupils. They may be heat sensors or compound eyes.
  • Mogwai in the Gremlins series when they've eaten after midnight and become evil.
  • Horrific: In Crypt of the Undead, the undead executioners have red eyes, as does anyone possessed by the ghosts of the witches.
  • In Horror Express, whoever the alien possesses or has zombified is noted with glowing red eyes when the train cars are dark. The effects that go with this go away in the light.
  • In I Bought a Vampire Motorcycle, the demon-possessed killer motorbike's headlight glows red when it's active.
  • It's not the eyes, but the robots in I, Robot turn on a red chest light when being controlled by the villain. Justified: it's explained that the red light indicates when a robot is downloading a firmware update from US Robotics. VIKI uses this connection to upload her (twisted) logic and understanding of the Three Laws into the consumer-model NS-5's.
  • In Judge Dredd, the deadly ABC robot controlled by Rico has glowing red eyes.
  • The Indominus Rex in Jurassic World.
  • The League of Extraordinary Gentlemen. Mina Harker gains red eyes when she lets her inner vampire out.
  • As well as Sauron in The Lord of the Rings, being a flaming red eyeball himself, the black horses of the Ringwraiths have glowing red eyes.
  • Man of Steel:
    • Zod in the final battle, when he cuts loose with his full set of Superman-like powers — including heat vision.
    • Inverted, as when Lois first sees Clark in the cave, his eyes are glowing red as well. He soon cauterizes her injury with his heat vision.
  • Marvel Cinematic Universe:
    • In Iron Man 2 The Mk II eyes light up blue like all Iron Man suits—as War Machine, they are red.
    • The Frost Giants in Thor have blood-red eyes, and it's the only other colour they have on their icy blue bodies. Loki also gets red eyes and blue skin when he touches the Frost Giants' source of power, showing he's one of them, but this is never brought up again.
    • In Iron Man 3 the Extremis virus turns the eyes of whoever been injected with it, glowing red. In fact it's the red eyes that is first real indication to Happy Hogan that's some villainy is happening.
    • In Thor: The Dark World those who are under the influence of the Aether aka Reality Stone have their eyes turn dark red. Similarly using the Power Stone in Guardians of the Galaxy turns the eyes purple.
    • The titular antagonist of Avengers: Age of Ultron has red Glowing Eyes of Doom along with his horde of robotic Mooks.
    • Subverted with Antman though Hank, Janet and Scott have red lenses in their helmets, they're quite a nice bunch.
    • Likewise Guardians of the Galaxy has a sinister figure in a full-face helmet with glowing red eyes strolling across a Death World. Then he collapses his helmet to reveal the rather goofy protagonist Peter Quill.
    • In Spider-Man: Homecoming, Spidey's suit has a Instant Kill Mode which turns the normally wide white eyes of Spider-Man into small red glowing pupils. Peter, who follows the Thou Shall Not Kill rule, takes issue with it.
    • In all her appearances Wanda's eyes glow red when she casts her magic. Her victims in Avengers: Age of Ultron also undergo this when subdued to her Mind Rape.
  • The Mask. When the criminal Dorian Tyrell puts on the magical mask of Loki and his massively evil hidden dark side comes out, his eyes become red.
  • The Matrix. The Sentinel "search and destroy" robots (which threaten the humans in the real world throughout the trilogy) have multiple glowing red eyes.
  • Although we never actually get to see their real eyes, the glowing red goggles of the Red Eyes gang in Mystery Men seem to reflect this trope.
  • This happens to Falcor in The Never Ending Story 2, when he refuses to carry the sorceress Xayide.
  • Freddy Krueger had a hellish pair in A Nightmare on Elm Street Part 2: Freddy's Revenge. Subsequent films gave him normal looking ones, though.
  • Oblivion : You didn't expect the HAL 9000-eyed drones to be up to any good, did you?
  • One Hour Photo has Robin Williams in a calm dream sequence, but when he opens his eyes, they are blood red and some blood trickles out of one. He then puts his hands on his eyes, screaming out "AAAAHHHHHHH!" while blood flies all over the place from his eyes.
  • Popeye and a very late Olive Oyl in The Movie carrying the newly discovered Swee'Pea at the door of Olive's house after being late for a date with Bluto=big trouble. Bluto, seething with anger, sees Popeye, Olive, and the baby through red eyes, pummels Popeye into the ocean below, and, in the next scene, persuades the taxman to tax the prestigious Oyl family into bankruptcy as revenge.
  • Subverted in Spaceballs. When the baby xenomorph bursts out of John Hurt's chest, it has red eyes, but it immediately goes into its "Michigan J. Frog" number and dances away.
  • Star Wars: The "Sith eyes" seen on Darth Sidious, and later Darths Maul and Vader in the prequels (technically gold rimmed and flecked with red, but it still counts) Maul is shown to have them all the time, but he's not human and his eye color is never seen while he's doing anything but hunting the heroes and fighting. Vader is only seen with them when he's feeling particularly "eeevil." Sidious' eye color, on the other hand, switches between Sith gold and their original blue depending on whether he is being his evil self or masquerading as a benevolent politician. Ultimately, his eyes become gold-red permanently after his grueling duel with Mace Windu.
    • This trope is applied sometimes with Count Dooku, a.k.a. Darth Tyranus, who is seen with Sith eyes few times in animation and novels but not in the prequel movies.
    • The eyes of Cad Bane from The Clone Wars, the Nemoidians and Grand Admiral Thrawn may fit this trope better on a superficial level (being pure red), but this is only because that's the natural eye color of their respective races — not Sith sorcery.
    • In the theatrical version of A New Hope, Vader's eye lenses had a dull reddish tint to them due to the materials used. It probably wasn't intentional, due to the fact that later edits removed the reddishness in order to hide David Prowse's eyes. However the red lenses are brought back in Rogue One and they look great.
    • Played with in Solo when Qi'ra contacts the previous unseen leader of Crimson Dawn, revealed to be Darth Maul. While she doesn't have them herself, the glow of Maul's red lightsaber reflects on her eyes, giving them a red color, symbolising her decision to stay with Crimson Dawn rather than escape with Han.
  • The older "ghost" in The Stone Tape first appears as a pair of glowing eyes hovering in the darkness. Then to show how inhuman it is one eye begins to orbit the other as it approaches the heroine.
  • In Teen Wolf (1985), Scott's eyes flash red and his voice drops to an evil growl to intimidate the hard-ass old man into selling him a keg of beer.
  • Most of the Terminators from, well, the Terminator franchise have glowing red eyes, which become even more obvious when only their endoskeletons are showing.
  • The Hood, the villain of the live-action Thunderbirds film, has these when he uses his psychic powers. His heroic niece, Tintin, has Supernatural Gold Eyes in contrast, when she uses her powers.
  • The Japanese stranger from The Wailing usually looks like a normal old man, but when hunting in the wild he is pictured with red eyes (and also almost completely naked).
  • In Who Framed Roger Rabbit, Eddie Valiant remembers that the toon who killed his brother had "burning red eyes" and a Creepy High-Pitched Voice. That toon is later revealed to be Judge Doom.
    Judge Doom: REMEMBER ME, EDDIE?! WHEN I KILLED YOUR BROTHER, I TALKED JUST! LIKE! THISSSSSSSSSS!!
  • The Wizard of Oz (1939). In the Haunted Forest, Dorothy and her companions see two evil owls and two vultures. All of these birds have glowing red eyes.
  • Bishop in X-Men: Days of Future Past.
  • Young Sherlock Holmes. When the gargoyle in the shop starts to animate, its eyes glow red.

    Literature 
  • The Amityville Horror. The youngest child, 5 year-old Missy, had repeated encounters with a pig-like demonic creature with red glowing eyes whom she called Jodie.
  • Isaac Asimov:
    • "Reason": When Donovan insults QT's god, the robot's eyes turn a deeper red and the narration tells us that the tension between them increases. It is as if the robot was angered by the heresy.
    • "Robbie": Mrs Weston is disturbed by Robbie's Glowing Mechanical Eyes, but Gloria and Mr Weston disagree with her assessment.
  • Beowulf: The monster Grendel is described as having glowing red eyes: "on fagne flor feond treddode,/eode yrremod; him of eagum stod/ligge gelicost leoht unfæger" ("Across the decorated floor the fiend trod, went enraged in mind; there stood in his eyes a foul light most like to flame").
  • Bored of the Rings, a parody of The Lord of the Rings: the Black Riders have "perfectly normal red glowing fires" where their eyes should have been.
  • The Chronicles of Prydain novel The High King. Gwythaints, the bird servants of the Dark Lord Arawn, have blood-red eyes.
  • Mayor Oculon of City of Devils has... well, is a giant red eye. With tentacles.
  • In "Cold Snap", Diabolical Mastermind Derek Leech's Rolls Royce has a customized hood ornament with rubies for eyes.
  • In Robert E. Howard's Conan the Barbarian stories "Shadows In Zamboula" and "Queen of the Black Coast", villainous Evil Sorcerers have red eyes.
  • Michael Moorcock's Corum: The Queen of the Swords''. Prince Gaynor the Damned, an evil champion of Chaos, has dead red eyes that blaze in terror and agony.
  • The Cosmere:
    • Voidbringers in The Stormlight Archive are alleged to have red eyes, and we see at least one form of Voidbringer, a thunderclast, with glowing red eyes. Furthermore, in Words of Radiance, the Parshendi's eyes turn red when they transform into Voidbringers.
    • In Shadows for Silence in the Forests of Hell, the shades normally drift away from humans and are mostly harmless unless you manage to walk right into one despite them drifting away. But break the Simple Rules (don't move too fast at night, don't kindle fire, and never draw blood), and their eyes light up red as they enrage. If that happens, if there is a nearby safe place enclosed by silver, run there. Otherwise, your ass is toast.
  • H. P. Lovecraft's Cthulhu Mythos story The Haunter of the Dark. The titular monster has a red, three-lobed, burning eye.
  • Those possessed by demons in Dance Of The Butterfly will show a red coloring to their eyes.
  • For most of the first book in the Deptford Mice trilogy, all anyone ever sees of Big Bad Jupiter are his fiery red eyes emerging from the blackness of the portal where he dwells, located in the sewers of London.
  • The plus-sized Tyrannosaurus rex in Dinoverse, who Mike names "Moriarty", is first seen with eyes that seem to glow red, though Mike thinks it's a trick of the sunset or a reflection of the blood at the dinosaur's feet.
  • Subverted in the web-novel Domina. A lot of the demons have red eyes, but since it's optional, they almost certainly chose them to invoke this trope for intimidation.
  • Dracula has red eyes. His houseguest, Jonathan, being British, does not comment on this.
  • Dragontales, a collection of Dungeons & Dragons-related stories.
    • In "Out of the Eons'', a Gardner F. Fox "Niall of the Far Travels" short story, the evil deity Adonair has wide fire-red eyes.
    • "Black Lotus Moon". The huge guardian monster in Garilon's tower has large, saucer-shaped eyes with red irises like clots of blood.
  • The villainous Steerpike of Mervyn Peake's Gormenghast series has dark red eyes.
  • In "Green Tea" by Joseph Sheridan Le Fanu, the demonic monkey that pursues Reverend Jennings has eyes that glow from within with a "faint but deep red light". Indeed the first thing Jennings notices when he first sees the monkey are its eyes, appearing as two "tiny discs of red" hovering in the darkness.
  • Lord Voldemort from the Harry Potter books (although not in the films of the books, except the first, which actually gets it right).
    • Red eyes seem to imply evil thoughts/feelings. Young Tom Riddle's eyes gleam red briefly at a moment when he is extremely greedy, and later, when he has started turning into Voldemort, his eyes become bloody-looking - they ultimately end up staying pure red after he splits his soul seven times. Also, when Ron is being psychologically tortured by Riddle!Harry-and-Hermione from the horcrux, his eyes flash red for just a second...before he ignores them and shuts them up for good.
    • Notice the formidable chiasmus at the end of Goblet of Fire. Voldemort has red eyes and uses a green Death Ray. Harry Potter has good green eyes, and uses the good red ray (remember the color-coding of laser beams in the original Star Wars trilogy).
  • In Heart of Steel, Alistair's mechanical eye normally glows blue, but when he is angry it glows red.
  • Mentioned a lot in The House of Night. The Red Fledglings and Vampires have red eyes when they've just fed from a human or when they're seriously pissed off. The Raven Mockers also have red eyes.
  • The Shrike from the Hyperion Cantos is a 3-meter-tall Nigh Invulnerable being made of lethally sharp blades. It has multifaceted red-glowing eyes and most times it shows up, it's to carry someone off to be impaled on a gigantic thorn tree where they will live forever in agony.
  • In the League of Magi stories, Rose Cross has red eyes as a symptom of her albinism. She's not quite evil, but she's definitely scary.
  • In R. A. Salvatore's The Legend of Drizzt, the drow have deep red eyes. This trope is carried even further in that Drizzt, one of only two good drow seen in the series, has lavender eyes.
  • J. R. R. Tolkien's The Lord of the Rings
    • The villain Sauron, while not red-eyed himself, uses a red eye on black as his symbol.
    • In The Two Towers, the Mûmak (giant elephant) who tramples the Ithilien Rangers and men of Harad is said to have raging small red eyes.
    • In The Return of the King chapter "The Scouring of the Shire" it says that Saruman's evil agent Wormtongue has red eyes.
  • In the Malazan Book of the Fallen, Silchas Ruin is said to be a "red-eyed nightmare". Depending on the point of view, he is either a villain with good intentions, or a heroic man with bad publicity, but either way his red eyes are what ticks people off that he's dangerous. They are variously described as lifeless, reptilian, unnerving, cold and dead.
  • In the original picture book of Mars Needs Moms, Milo's mom (and Milo himself) have bright orange-red eyes. It doesn't mean anything but it does make The Reveal of Mom's face a little unnerving.
  • The short story "Nitimandrey & the Cabinetmaker's Vision in Ares'' magazine Special Edition #1 (Summer 1983). When King Nitimandrey and the cabinet maker enter the cave beneath the fifth peak of Mount Nanda-pe, they find large numbers of bats with red Glowing Eyes watching them. The evil bats are eventually commanded to attack the pair and almost kill them before they finally escape.
  • Ares from the Percy Jackson and the Olympians books actually has fire where his eyes should be. Hestia is an aversion (as mentioned below).
  • Peter Pan. Captain Hook had light blue eyes, but when he was angry, they would flash red.
  • Dean Koontz's Phantoms. When appearing to Jeeter and Kale in the cave, several of the monstrous forms that the incredibly evil Ancient Enemy takes have red eyes.
  • In The Price by Neil Gaiman, the main character realizes that the creature coming for them is the Devil because it has red eyes. While he's looking through night vision goggles.
  • In Race To The Sun all monsters that Nizhoni can see have red eyes, at least for her monster-hunting senses. Which is helpful, as they are shape-shifters.
  • In the Rainbow Magic series, Storm the Lightning Fairy's book has an extra-mean goblin with red eyes. He shoots lightning at the girls with the power of the Lightning Feather.
  • Hannibal Lecter of The Silence of the Lambs is depicted with maroon (brownish-red) eyes in the books.
  • Melisandre from A Song of Ice and Fire is an Evil Redhead as well.
    • Ghost the albino Direwolf has red eyes, noted to be different from Melisandre's, resembling more the blood-red eyes of the weirwood Old Gods. And he's definitely capable of taking off limbs if so inclined.
    • Much like Sauron above, Euron Greyjoy uses a red eye with a black pupil as his personal crest, and given his brother Aeron's description of his "bloodeye", his hidden left eye may be red, though his nephew Theon seems to believe it is black.
  • In the Sonja Blue series, red eyes are one of the symptoms of vampirism, which makes sunglasses very popular with the vampires—hence the title of the first book of the series, Sunglasses After Dark.
  • The Star Trek: The Next Generation novel The Devil's Heart depicts Captain Picard with red eyes while holding the titular Artifact of Doom on the cover.
  • Star Wars Legends:
  • Lung Tien Lien from the Temeraire series is an aristocratic albino Dragon Lady with blood red eyes. She also happens to be a twenty-odd ton Lady Dragon with a fearsome sonic attack for a breath weapon.
  • Lin Carter's "Thongor of Lemuria" stories.
    • The Grakk, a scaly flying lizard-like monster of the jungles of Chush, has cruel, scarlet eyes.
    • The Dragon-Kings, who were the previous rulers of Lemuria before the humans came, have slitted red eyes. They were extremely evil and had great knowledge of sorcery and necromancy.
    • The Gunth, extremely strong beastmen who lived in jungles, had gleaming red eyes.
  • George R. R. Martin's Haviland Tuf short story "A Beast for Norn". The ironfangs of the planet Lyronica are giant vicious wolf-like creatures with huge teeth and sunken red eyes.
  • In the Twilight novel series, the vampires who drink only human blood have red eyes.
  • In Vampire Academy, Strigoi have red rings around their pupils. Seeing red eyes glowing in the dark alerts dhampir guardians to expect an attack.
  • When Warren the 13th is in the boiler room of the hotel, we see a bunch of creepy red eyes glowering at him. Subverted when it turns out that the monster they belong to, Sketchy, is very friendly and means no harm at all.
  • The monstrous alien in John W. Campbell's novella "Who Goes There?" has three red eyes.
  • Michael Stackpole's Wolf & Raven short story "Fair Game". The cyberdog that Selene Reece sends after Wolfgang Kies has eyes that look like red starbursts.
  • One of the villains from Madeline L'engle's A Wrinkle in Time is called simply... the Man With Red Eyes.
  • Inverted in The Children of Man. In this setting, red eyes mark you as a Tereskan, an order of healer-mages who are one of the primary forces of good in the setting.
  • Area 51: The Airlia all have red eyes, and sure enough, they're bad guys.
  • The Death Dealer from Frank Frazetta, is depicted with either red eyes or completely white depending on whether he's about to fight a strong foe or not. The books based on the character artwork, are about the Barbarian Hero, Gath of Baal who's already superhumanly mighty before he becomes the bearer of the Horned Helm which makes him the avatar of the evil god of death.

    Live-Action TV 
  • Angel: Lorne's got red eyes because he's a demon, but he's a gentle soul who's pretty sweet and fun company.
  • The second Vorlon Ambassador in Babylon 5 has a red light in the "head" of his encounter suit, compared to the original Kosh's green. He's a much, much nastier person.
  • Battlestar Galactica: Cylons. The single red flashing eye makes up a great deal of the Centurions' and Raiders' intimidation factor. Strangely, the only time we see a humanoid Cylon with red eyes, it's Sam Anders, one of the good ones.
  • Buck Rogers in the 25th Century episode "Space Vampire". The Vorvon's eyes glow red when it's using its Mind Control powers on a victim.
  • Buffy the Vampire Slayer:
    • The Master has red eyes, even though vampires usually have yellow eyes.
    • After Tara is killed, Willow looks up, and her eyes are glowing red. It's even lampshaded/foreshadowed by the episode's title, "Seeing Red".
    • Red eyes are possessed by the First Evil's briefly-seen true form.
    • The comics show a new breed of vampires. They are much more powerful than the old breed because they are not only much stronger, but are also immune to sunlight. And while the breed of the old vampires, almost always have yellow eyes, the new vampires have red eyes.
  • Charmed: Used on Inspector Rodriguez to confirm him as an upper-level demon.
  • Doctor Who:
    • In "The Robots of Death", the eponymous robots' eyes are filled with red static when they prepare to kill.
    • "The Curse of Fenric": Those possessed by Fenric gained blood-red eyes, but only after they had faded from their initial shade of dark green.
    • "The Unquiet Dead": When the Gelth reveal their true colours as being hostile, the one speaking through Gwyneth changes from blue to red, starting with the eyes.
    • When the usually-placid Ood get red eyes, it's a bad sign, though we later learn there's more to it than meets the, well, eye:
      • "The Impossible Planet"/"The Satan Pit": They've been possessed by an entity claiming to be Satan.
      • "Planet of the Ood": Random Ood at Ood Operations are getting "red-eye" and killing employees with their translator balls out of anger at the way they've been treated. The red eyes simply mean they're drawing on the telepathic field that connects them.
      • "The End of Time": Played with. This time, they're not getting violent, they're warning the Doctor that "The End of Time itself" is imminent. The elder Ood's eyes take on the red glow when showing the Doctor visions of the future. He's drawing on the Ood's psychic network to do it, which is in fact the true meaning of the red eyes. Before, it had been hijacked by the "devil", while later it let the occasional Ood overcome the slave programming and fight back against the real villains. We see the red-eye mode in its totally non-dangerous natural form in "The End of Time". Russell T. Davies, showrunner at the time, actually considered "glowing red eyes = evil" to be a played-out cliché, so it's no surprise he didn't play it straight..
      • "The Doctor's Wife" averts it: The House's Ood servant Nephew is possessed by it, and dangerous, but his eyes glow green instead.
    • Also from "The Impossible Planet"/"The Satan Pit", the only human that "Satan" managed to possess also gained blood-red eyes while the Beast was in control.
    • The Siren from "The Curse of the Black Spot" turns not only her eyes, but the rest of her projected body from green to red when anyone gets between her and her victims.
    • "Nikola Tesla's Night of Terror": Most of the Skithra have glowing red eyes, which is the main signifier of their alien nature for those disguised as humans.
  • On Farscape, if a Delvian's eyes turn red, be moving in the other direction. It means they're going insane.
  • In The Flash, Eobard Thawne aka the Reverse-Flash can make his eyes glow red, coupled with a menacing Voice of the Legion. Similarly, other speedster villains have coloured eyes as well, such as Zoom's black eyes or Savitar's light blue eyes.
  • Game of Thrones: Euron Greyjoy's personal flag is the Greyjoy kraken sigil but with a red eye emblazoned across it.
  • Gilligan's Island episode "The Pigeon". The castaways run into a Black Morning Spider. It's six feet long, weighs 500 lbs. and has red eyes.
  • On Grimm, we've seen Monroe's eyes turn red when he's upset, but not ready to go full Game Face in that situation.
  • In House of Anubis, once someone becomes a sinner, they obtain red eyes when they are feeling particularly "evil". It's merely for a second.
  • Darien Fawkes of The Invisible Man isn't evil, but he's prone to states of psychosis induced by the invisibility-causing gland in his brain; when he starts to flip out, his eyes go red. But when he gets to the point of no return, his eyes turn silver.
  • Inverted with Kamen Rider Kuuga: Kuuga's Ultimate Form having red eyes is a good thing, since it shows that Yusuke is in full control. When they turn black, however, that's when you should start running.
    • Similarly, in Kamen Rider OOO, Eiji's eyes turning purple (whether he's transformed into OOO or not) is a sign that the Purple Core Medals have taken over and he's about to go berserk.
  • Kamen Rider Fourze's Big Bad was initially known as "The Red-Eyed Man", even in official in promotional materials, before they revealed his true identity: Mitsuaki Gamou, the chairman of the high school attended by all the heroes.
  • Kamen Rider Ex-Aid: Emu's eyes flash red when he shifts into his gamer self - M. Also, when a victim of Game Disease gets glowing red eyes, it means that the Bugster is taking over. Yes, these two things overlap.
  • Kamen Rider Build: Ryuga's eyes glow red when he is stressed over having to helplessly watch his teammates get beaten nearly to death. It's because his emotions react with the remnants of the Eldritch Abomination residing in him.
  • Kamen Rider Zero-One: Humagears' eyes go from blue to red when they're infected by the villainous MetsubouJinrai.NET's virus and go berserk. In Episode 9 it's explicitly pointed out by TV pundits discussing the crisis, but this gets thrown out the window due to A.I.M.S.' Yua Yaiba leaking footage of MetsubouJinrai's Assassin to the media; because he was built evil and not reprogrammed, he has blue eyes all the time. MetsubouJinrai's Horobi and Jin are also evil Humagears without red eyes.
  • In Lucifer, the titular character has the tendency to show his true eyes to threaten or warn humans to not to cross him, with responses falling between astonishment and panic.
  • The Mandalorian. In "Sanctuary", the title character has to take on an ex-Imperial AT-ST, and his first sight of it is the red light through its viewports shining through the darkness as it powers up. Bonus points for Shown Their Work as cockpit lighting in real aircraft is generally red to prevent it from interfering with the pilot's night vision.
  • In Merlin, Gaius realises that two visiting nobles are actually evil enchanters as he sees one's eyes flash red in a fit of anger. He really does take warning at the red eyes.
  • In The Messengers, an unidentified man has eyes that glow red. He is revealed to be Satan.
  • Mighty Morphin' Power Rangers: Goldar's eyes are red and kinda glowy, Lord Zedd's visor is red, and the occasional monster has had red eyes.
  • In an episode of the second Mission: Impossible series (1988), Mr. Phelps uses contact lenses that can glow red on command as part of a plan to convince his mark that he is the Devil.
  • Night Gallery episode "Pickman's Model". The extremely evil ghouls are "more foul and loathsome than the putrid slime that clings to the walls of Hell". They eat human flesh, kidnap human women for procreation and have red eyes.
  • The Orville, Some of the Kaylon have red eyes.
  • Russell T. Davies thought this was a clichéd trope, so specifically avoided it when writing The Second Coming, where one of the characters is possessed by the Devil, but has silver eyes instead. However RTD found the trope was so prevalent the SFX people had automatically given the character red eyes, and they had to be changed to silver.
  • Smallville:
    • Davis Bloome gets these when he's transforming into Doomsday.
    • Warrior Angel/Stephan Swift when a curse turns him into Devilicus.
  • Randall Flagg in The Stand miniseries.
  • Star Trek:
    • In Star Trek: Enterprise, the Na'kuhl (or, as they are better known, the "Red Eye Aliens" or "Evil Alien Nazis") all have red eyes, clinching them as candidates for the most evil-looking aliens in the history of fiction.
    • Jake Sisko and, later, Dukat temporarily develop glowing red eyes while possessed by the Pagh Wraiths in Star Trek: Deep Space Nine.
    • In the Star Trek: The Next Generation episode called "Imaginary Friends" the titular girl, Isabella, gets red glowing eyes when she is upset when Clara leaves her at Troi's suggestion.
  • In Supergirl, the audience sees the D.E.O. boss, Hank Henshaw, with glowing red eyes. Combined with hints of him hiding something and his name belonging to a supervillain in the comics, do you want to bet he's up to no good? Subverted: he's actually Martian Manhunter, having stolen the real Hank Henshaw's identity. As noted in the comic book section above, when she or her cousin gets red eyes, then they're really pissed.
  • Supernatural:
    • Crossroads Demons. Other demons have similarly evil shades of white, yellow, or black.
    • As of Season 11, Lucifer occasionally flashes red eyes as well. This is actually unusual, since he is an archangel, not a demon. Any time an angel's true form has appeared, it was simply a blinding white light.
  • Teen Wolf, Alpha werewolves' eyes turn red when they feel angry or predatory, even in human form. Once they shift, their eyes may glow outright. Also, Scott's yellow/gold eyes whenever he transforms.
  • In the original V (1983) series, the Visitors' true reptilian forms had red eyes.
  • The X-Files, episode "Detour": MOTW creatures Moth Men had glowing red eyes. Very scary.

    Music 
  • The Sweet's "Ballroom Blitz" mentions this about the man in the back. "As a matter of fact, his eyes are as red as the sun." He's responsible for it turning into the titular ballroom blitz.
  • David Bowie's "Cat People (Putting Out Fire)", written for the 1982 film, has a lovelorn man singing to an object of desire, warning her of the intensity of his need. The first verse establishes that his eyes are usually green, but they become red in the second verse:
    "See these eyes so red
    Red like jungle burning bright
    Those who feel me near
    Pull the blinds and change their minds."
  • The Putin-P series features the Vocaloid Rin as its main character, whose eyes turn red when she reverts to Red Rin, a dangerous and Yandere part of her programming that's actually resultant of a virus inserted into her. Camui Gackpo, contrary to his official design, also sports these, and attempts to kill Rin in his introduction. Len remarks on it during their showdown.

    Music Videos 

    Myths & Religion 
  • The eyes of cemetery statue "Black Aggie" are said to glow bright red in the middle of the night, either blinding or killing anyone who looks into them (source). One Urban Legend/Creepypasta talks about a man who stays at a hotel but is told to stay away from a certain room. Out of curiosity, he peeps through a keyhole and sees an apparently normal room, with a woman sitting against a wall. When she moves, he backs away and returns to his room. Later, he tries looking in again, but he can only see something red through the keyhole. Not able to stand the questions any longer, he asks the hotel clerk what's wrong with the room. She tells him that, years ago, a couple died inside, and they tended not to mention it to avoid upsetting guests. She also mentions that the couple had unusually red eyes.
  • The Urban Legends creature known as Mothman is said to have glowing red eyes.
  • Most people associate red eyes with Demonic Possession and The Devil.

    Pinball 
  • The antagonist in Centaur has small red eyes, as if his bestial face, inhuman form, and dominatrix-inspired design didn't raise enough warning flags.
  • Similarly, the monstrous Varkon has round red eyes, which combine with his small fangs and rounded, brutish face to complete his Monstrous Humanoid appearance.
  • In Krull, The Beast's red glowing eyes can be seen o both the backglass and the lower-level playfield.

    Pro Wrestling 
  • Ojo Diabolico Jr's Third Eye has a red pupil. His XMW Tag Team partner Ludark Shaitan invokes this trope by painting pink circles around her eyes.

    Theme Parks 
  • The Haunted Mansion: In Phantom Manor (the Paris incarnation), the Phantom's eyes glow red at passing riders both times that you pass up close to him (after leaving the Bride's Boudoir, and when leaving Phantom Canyon).

    Toys 
  • Zigzagged in BIONICLE. As a general rule, the color of the eyes can be used as an indication for "good or evil", but you have to ask yourself how the eyes fit with the armor.
    • In the movie Bionicle: Web of Shadows, Toa Vakama inverts this: he has red eyes until he goes over to The Dark Side, at which point, his eyes turn green. His toy, on the other hand, always had green eyes.
    • The evil Roodaka from the same movie had blue eyes as a standard, but when she got really angry, they turned bright orange/red.
    • And naturally, the original Big Bad, Makuta Teridax, also had his trademark red eyes (which he liked to project into shadowy corners), (though in his original set form he had blue eyes with red sclerae),as did many of his brethren, as well as some other villains in the toyline (Krekka, Sidorak, Piraka, Keelerak spiders, etc.). Some, however, eventually substituted orange for red, when the eye colors became Colour-Coded for Your Convenience. Generally speaking, though, the eye colors of the Bionicle characters were all over the place, especially in the earlier years.
    • When Teridax hijacks Mata Nui's body, his eyes go from yellow to red.

    Visual Novels 
  • Danganronpa:
    • Danganronpa: Trigger Happy Havoc:
      • Celestia Ludenberg fits this trope, since while they seem helpful and sweet in the beginning of the game, eventually she ends up responsible for two murders, and showed no mercy for it unlike the previous two murderers. Of course, even before that, she was pretty cutthroat and has always been a good liar.
      • Kiyotaka Ishimaru technically fits - even though he never makes a full Face–Heel Turn, his red eyes are a predicator for when he absorbs Mondo's spirit and becomes the loud and aggressive Kiyondo Ishida.
    • From Super Danganronpa 2, Peko Pekoyama, the Ultimate Swordswoman has a very noticeable bright red color to her eyes. She's also something of a Perpetual Frowner and yes she is a dangerous individual, being a hitman for the Kuzuryu Clan of yakuza.
    • In New Danganronpa V3, Maki Harukawa is an uncooperative and brutally honest girl who's actually the Ultimate Assassin. Gonta Gokuhara, on the other hand, has red eyes and is a Gentle Giant (unless people insult bugs), but he ends up being manipulated into committing murder to Mercy Kill his classmates.
  • The dragonslayer's armor in Dra+Koi has glowing red eyes, suitable for its role as the sort-of antagonist.
  • Nasuverse: A number of characters in the franchise have red eyes, and while it's rarely commented on in-story, a common thread is that all red eyed characters are supernaturally powerful in some manner. Characters like Gilgamesh or Cu Chulainn have divine blood, and their red eyes are an indicator of that. Vampires of all types have red eyes, and people turned into vampires will gain red eyes. Illya is a homunculus with tremendous magic power. In short, the red eyes do not indicate a character's morality, but anybody who does have red eyes is generally not someone you want to mess with.
  • Solidly averted in Katawa Shoujo with Akira Satou, Lilly's easygoing Cool Big Sis. Well, there is the fact that she's quite happy to supply Hisao, Lilly and Hanako, who are minors, with alcohol.
  • Inverted in Suika. Shinigami have red eyes, but are exclusively the kindest and gentlest people who have died.
  • In Umineko: When They Cry, the Stakes of Purgatory always wear these eyes. Considering that they are Beatrice's furniture, one can guess what happens when they're around...
  • For a brief moment in fault milestone one, Rune has them as Ritona investigates the graveyard. While this was intended to make Rune appear more sinister than she actually was for that particular scene, it also foreshadowed the reveal that she was an automaton.
  • In Code:Realize, glowing red eyes are a sign that the person in question is under the influence of Hidden Strength, a process which uses physical and emotional torture to unlock greatly enhanced physical abilities and leave them Brainwashed and Crazy.
  • The vampires in Shall We Date?: Blood In Roses have this happen to them when they're about to drink a person's blood. If the vampire has made someone their belonging, their eyes will also turn red when they command the belonging to do something.
  • Wilhelm from Dies Irae is perhaps one of the most depraved villains in the story, and being an albino, he has bright red eyes. And the more and more he get's into a fight, the more his eyes start to glow and and take on Black Eyes of Crazy on top of it. This is especially noticeable when compared with the other albino of the cast, Claudia, who have golden eyes instead and is kindhearted to a fault.
  • The key art for Spirit Hunter: NG features the protagonist with a single, glowing red eye. This shows up once in the game; in the Bad End where he's been transformed into a bloodthirsty monster.

    Web Animation 
  • This trope gets a Lampshade Hanging in Death Battle when discussing the Robot Masters during the analysis section of Wily vs Eggman.
    Boomstick: Metal Man was specifically made for killing things. You could tell, 'cause he's got evil red eyes.
  • Dreamscape: Snowball, when in his adult bear form, gets red eyes.
  • DSBT InsaniT: To show that ??? is evil, its the only thing that seperates him from Koden. Killdra even thinks he's just Koden high on drugs at first.
    • The Darkness counterparts all have red eyes.
  • Maxwell Edison, in an almost disturbingly well-done Flash video of The Beatles' "Maxwell's Silver Hammer", is depicted with red eyes.
  • In Daria Cohens The Vampair Series not only do the vampires have glowing red eyes but so does the evil magic cane.
  • RWBY:
    • Yang typically has light purple eyes. However, should she get angry and start powering up her Semblance, her eyes turn red and flames burst forth from her golden hair. Characters in-universe learn to recognise very quickly what her eye colour change means and to either try to calm the situation down or go into battle mode themselves.
    • The camera has a tendency to zoom in on Emerald's vivid red eyes whenever she's tapping into her mind control powers. Emerald's abilities are the main reason why Cinder is so successful in destroying Beacon Academy and becoming the next Fall Maiden. She can make a target perceive anything she wants, and all the senses are fooled, not just sight. She enables Amber to be ambushed by making Amber think there's a crying child in need of help, and ensures Amber has troubling seeing exactly where Cinder, Mercury and herself are during their fight even when looking straight at them. She also fools Yang into seeing and hearing Mercury attack her from behind after their tournament ends, resulting in Yang appearing to the watching world as though she's attacked a badly injured and defeated Mercury for absolutely no reason. This disqualifies Team RWBY from the tournament.
    • Ozpin once tells Ruby that the gun-scythe weapon is one of the most dangerous weapons in the world and he only knows of two people who wield it with great proficiency: her and the man who trained her, Qrow. Qrow is an ill-tempered, rude-humoured, hard-drinking huntsman with eyes that are a greyish red in color. He spends his time in the dangerous wilds of Remnant on mysterious missions for Ozpin or looking out for the safety of his nieces. However, his Semblance is permanently active: like a bad luck charm, his Aura triggers misfortune for everyone he spends any time around. It's extremely useful in battle where his opponents find their luck turning against them, but it also means he struggles to spend any time with friends and loved ones. When Qrow appears on the scene, Mercury panics that his presence may disrupt the villains' plans, and Salem hints that Qrow is enough of a threat for her to consider it useful to her cause if he's taken out of the equation.
    • Yang's mother and Qrow's twin sister, Raven Branwen, has vivid red eyes. Her own brother describes her as a dangerous woman who possesses a world-view that he doesn't much care for. She abandoned Yang and Yang's father shortly after Yang was born for mysterious reasons and only intervenes on a single, one-off occasion to save Yang's life, when the violence-loving Neo is about to kill her; Neo takes one look at Raven and flees the battlefield in terror. Raven is the leader of the Branwen Tribe, a notorious band of thieves and murderers who are the scourge of Anima. Raven typically wears a highly-detailed White Fang bird-mask that, like her vivid red eyes, make her look like a humanoid Creature of Grimm. While she opposes Salem and has been known to work against her, she refuses to support Ozpin's faction as well because she believes he is not the man everyone thinks he is and therefore is not to be trusted. As a result, she is a wild card that both the villains and the protagonists are wary of.
    • Salem's eyes are black pits with glowing red irises and elliptical pupils. This is similar to the glowing red eyes of the Grimm, and combines with her bone-white skin, red vein-like markings and black clothing to give her the appearance of a humanoid Grimm and make it ambiguous as to what kind of being she really is. As the Big Bad, controlling various individuals and organisations across the globe, including the Grimm themselves, her glowing red eyes reflect her malevolence.
  • Alastor the Radio Demon of Hazbin Hotel has bright red irises against blood red sclera, and they glow red when he goes into his Game Face. He's also one of the most powerful and notoriously evil demons in Hell.
    • Cherri Bomb has one large red cyclops eye and is a violent psychopathic anarchist.
    • Charlie's Game Face comes complete with hellish red eyes, a sign that no matter how sweet and perky she is, she's still the princess of Hell.
  • Glitchtale: After Asriel's SOUL is eaten by Kumu, Frisk is enraged to the point where their Level of Violence is immediately increased to 19, causing their eyes to open. Their eyes are glowing red as a result of their intense DETERMINATION.
  • On the website Scratch, user Qem-95 does this on his "Thank you for 300 projects!" animation in order to make the screamer he pulls off on the viewer scarier.
  • The Most Epic Story Ever Told in All of Human History: Ridiculously Epic, Epic Robot Guy, and Ridiculously Epic Fail all have red eyes and appear to be evil. Ridiculously Epic is outright confirmed to be evil when he destroys the moon and the sun at the end of the trailer.

    Webcomics 
  • In Adventurers!, Khrima has solid red eyes. It's an impressive feat of comic-villainy that this makes him look more silly than intimidating.
  • Hartwig from Ashface's Daughter has his eyes turn completely red whenever his true berserker curse activates.
  • Archipelago: when someone makes a deal with the Great Raven, their left eye is turned black with a red pupil.
  • In Average Joe, Fatale's eyes go from white, to glowing red behind her mask when angered. This happens a lot.
  • Bob and George: Helmeted Author has red eyes. This is one of the two things that make him different from the real Author - the other one is the obvious.
  • The Bongcheon-Dong Ghost has red eyes, but by the time you see them, it's already very obvious...and too late.
  • Early on in Chasing the Sunset, whenever Leaf's eyes go red, it means he's about to unleash the Furies. Not sure if it persists later.
  • In Comic Shorts, Leko the Robot's normally green eyes turn red when he gets very angry.
  • Combined with Hellish Pupils in Commander Kitty, when Zenith ends up running into Nin Wah again. Inverted after she breaks down and is turned back on sans personality, where her red pupils instead seem to signify her being at her most docile and obedient.
  • Played for laughs in Ctrl+Alt+Del, usually, one example being when Buckley got Street Fighter IV and grew increasingly frustrated over the computer AI being cheap.
    Buckley: God damn it, c.viper! I swear I am going to face-fuck you with a dump truck!
  • Dan and Mab's Furry Adventures: Aaryanna, Aniz, Dark Pegasus, Kria, and Regina all have red eyes, and are all pretty evil to varying degrees (Villainy Discretion Shots notwithstanding).
  • The "tainted" or Ver'drowendar from Drowtales have red irises; they "have been seeded by a demonic entity". All drow naturally have red pupils, but this is the result of eyeshine and is an evolutionary adaptation to living underground, but results in tainted characters having red on red eyes.
  • In El Goonish Shive, the first time Grace is seen to shapeshift her eyes go red during the transformation. This was dropped during all subsequent transformations.
  • In Endstone, rocking the Banestone gives Jon red eyes.
  • Parson from Erfworld gains red eyes after completing his sword, in a panel that makes him look genuinely frightening for the first time in the series.
  • Played with in the Erstwhile adaption of "Sweetheart Roland", where red indicates Mind-Control Eyes.
  • Fake News Rumble subverts this, as Stephen has red eyes (because of the phoenix'power), and he's one of the protagonists as long as his eyes stay red, that is.
  • The Fox Sister: The Kumiho loves this one.
  • In Freefall, a vengeance-minded robot has glowing red eyes for a moment.
  • Godslave:
    • Anpu's eyes start glowing red just before he delivers an impressive Light 'em Up flashbang to Turner.
    • Edith's eyes start to glow red whenever she uses her powers extensively.
  • Gunnerkrigg Court:
    • The yellow salamander/lizard-thing. It may not have been evil, per se, but it was certainly dangerous. The lizard was a house fire that killed a small child and his family.
    • Zimmy plays an odd variation of the trope. Normally she seems to have Black Eyes of Evil, but when she is temporarily purified from the etheric miasma that pollutes her spirit by natural rain, it turns out that her eyes are bright crimson underneath. In this condition she is a lot more coherent and amiable than her usual self, but acts as a reminder that she's not exactly normal, either way.
    • Hetty has red eyes and is as evil as they imply, as seen from her suggestion that Reynardine kill Antimony and her Irrational Hatred toward Adam.
    • The Court robots generally have green eyes, but they'll turn yellow when the robot is alarmed by something and red when they have detected certain kinds of threats. Although they're never evil, when in red-eye mode they do not respond to normal commands and will use violent force against the perceived danger without further warning.
  • Gaia Online:
    • Johnny K. Gambino.
    • And, ironically, his opposite number, Vladimir Von Helson, via heterochromias (one gray as is standard for Gaian vampires, one red apparently just for the sake of this trope).
  • Girl Genius: while subtle, it is seen well in this strip that Mama Gkika has red eyes. Possibly other Jägers, too.
  • Inverted in The Glass Scientists, as it's the calm Jekyll who has red eyes, while more dangerous Hyde's are green.
  • Marceline from God Mode is described as a "sado-masochistic chain-smoking woman". Which is more or less true.
  • All the vampires in Hanna Is Not a Boy's Name have red or reddish eyes, although some are more evil than others and the least evil of the four we've seen so far isn't drawn with visible irises at all.
  • Panim, the Misanthrope Supreme from Hello World.
  • In Impure Blood, when annoyed. Note that her eyes can also glow blue for other magical purposes.
  • Kagerou: when (the aptly-named) Red takes over Kano's body, his eyes turn red. And Red is a psychopathic rapist and murderer.
  • Zig-zagged in Kill Six Billion Demons: red eyes aren't uncommon in the Amazing Technicolor Population, but they do show up on some of the most dangerous people in Creation: God-Emperor Zoss and One-Man Army Maya.
  • Quite a few characters from L's Empire (most notably Dark Star). Pix averts this as, despite him always having red eyes due to being Dark Star's son, he's the nicest guy in existence.
  • In Looking for Group, most characters, regardless of whether they are evil or good, will display the "burst of anger" or bloodlust variant. Bloodrages will most prominently display it before dishing out punishment, but even Nice Guy Cale will display them in bouts of righteous anger.
  • Valentino, the Big Bad of Marilith, has red eyes. The effect is highlighted by the rest of the strip being mostly in black and white.
  • Otherworlders in Miamaska have red eyes and purple sclera. Citizens see this as a threat to their town and take action accordingly.
  • The Order of the Stick:
    • Sabine's eyes glow red in her true form. There is an early warning of her true nature in this strip, which is before she's revealed to be a fiend. Later, the glowing-red eyes are a hint for the reader that she's shapechanged.
    • Xykon has glowing red eyes too.
    • Also, Loki, god of Flames and Chaos.
    • Malack's eyes change to red from their usual pink when using his vampiric abilities.
  • Penny Arcade:
    • Tycho gets these whenever he gets particularly angry or is acting particularly evil, apparently because his body harbors a dark spectre from the world of dreams.
    • Penny Arcade sub-comic Automata. There's something in that time signature and it changes the eyes from the standard blue to...help.
  • Rescuing Dara averts this trope, with the hero Chivai and both the heroic and villainous Lucarios all having red eyes.
  • In Roza, the monstrous guard.
  • While this is not common due to the art style of Scandinavia and the World, it does occasionally show up, generally when either Åland or Finland are especially upset.
  • Subverted in Rusty and Co. by a hulking, red-eyed mercenary from a gnoll tribe: cousin Slobber, the friendly pug who loves cotton candy and happily pulls a Mook–Face Turn when his old boss takes a dive into lava.
  • Slightly Damned: Subverted with Buwaro note  or Lakritz who are both among the kinder demons around, however red seems to be one of the most common demon eye colors and most of them play it straight. The most notable of these demons is Iratu who at first seems to be friendly but that's because he was drunk and when we see him sober we learn he is a cunning and powerful General of Hell's Army who leads an attack on a major city that kills hundreds if not thousands of innocent people.
  • Sluggy Freelance: In one story, Bun-bun the evil mini-lop rabbit is stuck with the annoying animated shadow of the groundhog who's the Anthropomorphic Personification of Groundhog's Day. Unable to attack the insubstantial creature, he's forced to suffer all its antics. But finally it manages to do something that angers Bun-bun so much that he finally snaps. He gets so angry his eyes turn red, and subsequently he emits a red aura. Insofar as there is an explanation to this, it could be that by that time Bun-bun was already a mildly supernatural being due to being saddled with being the Easter Bunny as well as the official "groundhog".
    Shadow: What do you want to do?
    Kiki the ferret: I have a pretend karaoke machine made from a toilet-paper roll!
    Shadow: You like karaoke too?
    Kiki: I LOVE karaoke!
    Shadow: A one and a two and a
    Bun-bun: That's IT! Everybody dies!
  • Eli of Soul To Call has red, sometimes glowing eyes. While the population at large, especially The Order believes that he is dangerous, the fact is, that he is actually very meek, and shy. The red eyes glowing means that something else has just shown up, and that is what's actually dangerous.
  • Dr. Schtein of String Theory has prosthetic eyes that glow a sinister red, having lost his original eyes in a lab explosion. Thus far, they seem to be foreshadowing his eventual rise to supervillainy. They even glow in the dark, much to the horror of his prison roommate.
  • Darko, the mercenary from The Stupiders has glowing red eyes: [1].
  • Terra has Sovereign Northazul Kalar, Evil Overlord of an empire trying to conquer the galaxy, and his son Solus Kalar, head of a Nebulous Criminal Conspiracy that started out as a private army for Northazul.
  • Ha Yuri Zahard from Tower of God just lives and breathes this trope, especially when she gets serious.
  • Subverted in Two Guys and Guy: Wayne thinks Guy's eyes glow red in the dark because she's evil. The optometrist is pretty upset Wayne didn't mention it sooner, implying it's not only unnatural but also dangerous.
  • Underling: Demons. This is awkward for Lazarus when he gets them, and a tail, and horns.
  • Waterworks: Flush gains a set of red eyes just before he uses his deadly Spin Attack. "oh hey flush. you're sporting the evil red eye look rather nicely"
  • In Yokoka's Quest, Mao gets scary black sclerae with red irises at the start of his fight with Yokoka.

    Web Original 
  • In Void Domain, Arachne has eight of these.
  • SCP Foundation
    • SCP-1049 ("The Bonetaker Owl"). SCP-1049 is an owl that can suck a person's skeleton out of their body by biting them. It has red eyes.
    • SCP-1111 ("The White Dog"). The title ghostly animal has red eyes that glow more brightly the closer it is to its point of origin. It savagely attacks all human beings that approach it.
    • SCP-1461 ("House of the Worm"). In the accompanying story The Worm, exposure to the evil in the house changed some of the human workers into monsters with shining red eyes.
    • SCP-1819 ("Darkness is Only Skin Deep"). The boogeyman that inflicts the dangerous SCP-1819 effect on children is described by the children as having a large "bright" or "burning" red eye.
    • SCP-2901 ("Mothman"). SCP-2901's standard manifestation is a humanoid with dark-colored wings and large red eyes. They are known to attack human beings, especially when the humans flee them, and their touch causes the victim's skin to be ripped off. They also appear near the sites of disasters and eat the bodies of the victims.
  • The superhero guide How to Hero lists red eyes as a surefire indicator that someone is an evil clone.

    Web Videos 
  • In Microsoft Sam Reads Funny Windows Errors, when ever Sam is seen with red eyes, it's not a good sign.
  • Played for Laughs when The Nostalgia Chick reviewed My Little Pony: The Movie (1986): a certain pony had red eyes for no apparent reason. Every time she came on screen ominous music would start playing and the Chick would freak out.
    "And what's with your demon eyes?!"
  • Oswald Sherzikien's eyes turn red when he becomes a gigantic cartoon monster near the end of Journey of the Cartoon Man
  • In Heat vs Repulsion video, when heat was pissed off. Cue epic music. Watch it here
  • In Minecraft Diaries, Shadow Knights possess these in only their Shadow Knight forms if they have yet to gain their immortality, and all the time if they have done so. (At least, in most cases).
  • Dad: In "Dad Loves Mom", it's mentioned that when Mom is upset, "her eyes glow red"; with the implication that the family aren't even human, it's likely this isn't just figurative.
  • The Weather: At the end of the The Wizard of Oz segment, Alan, revealed to be a murderer and manipulator, talks to Toto — who is the only caller with red eyes rather than white, along with a deep voice. They've apparently been the one to convince Alan that everyone else is crazy, and it's implied that this is more-or-less a crazy Alan thinking he's talking to a demon dog.

    Western Animation 
  • Odd variant: while Serpentor from G.I. Joe: A Real American Hero was always evil, his eyes briefly turned red when he held the battleax of Vlad the Impaler, one of the many historical tyrants whose DNA he shared. This was presumably a hint that Vlad had really been a vampire in the show's universe and contact with one of his artifacts had evoked that trait in Serpentor.
  • Trina Riffin from Grojband whenever she's writing in her diary in Anger or Fear mode.
  • Skeletor, nemesis of He-Man from He-Man and the Masters of the Universe (2002). His eye (sockets) function as a literal warning, as little red lights start growing in them when he gets angry or excited in evil ways.
  • The Grinch in How the Grinch Stole Christmas! has red pupils on yellow for most of the film. His eyes turn blue-on-white during his Heel–Face Turn, then switch back (by mistake?) for a few shots, then stay blue.
  • The Hollow: The devil dogs have glowing eyes that have a reddish tint.
  • In Jackie Chan Adventures, the Shadowkhan and the Demon Sorcerer Big Bad Duumvirate, among others, have red eyes. When Jade and later Valmont get possessed by the show's overall Big Bad Shendu, their eyes turn red whenever HE'S in control of their body.
  • Jonny Quest TOS episodes
    • "Monster in the Monastery". The fake yeti (who are malicious enemy agents) have red eyes.
    • "The Robot Spy". The titular opponent - which was sent by the Diabolical Mastermind Doctor Zin - has one large red eye.
  • In Ivick Von Salza: The Little Lumberjack, whenever the yeti gets mad, his eyes turn red.
  • Played with in The Legend of Korra: The imposing and scary Red Lotus combustionbender P'Li has eyes of an unusual shade of russet—which is still in keeping with the usual theme of firebenders having gold or brown eyes—and a bright scarlet one tattooed on her forehead.
    • Played straight with Unalaq, whenever he enters the Avatar State, and in his Dark Avatar form.
  • The Biskit twins in Littlest Pet Shop (2012) have reddish eyes, though they're not so much evil as they are sheltered and distant from those around them.
  • Dick Knubbler's robotic eyes turn red when he gets pissed off in Metalocalypse. Not so much "evil" as "Jerkass", but when one works for five Chaotic Neutral musicians that cause destruction wherever they go (by accident, sometimes, even!), it's hard to call oneself "good".
  • In My Little Pony: Friendship Is Magic, the Alicorn Amulet makes the wearer's eyes go red. Trixie, who showcases the effect, becomes drunk with power and starts acting outright like a tyrant, as opposed to her moderate Jerkass tendencies.
    • In "Power Ponies", Fluttershy's eyes turn red when a firefly was flicked out of the crosshairs of the weapon as part of her Hulking Out.
    • Fluttershy gets red eyes again in "Bats", when she's turned into a vampire.
    • In Rainbow Rocks, the Dazzlings get completely red eyes in their anthro-siren forms.
    • In "To Where and Back Again," Discord's pupils literally turn to fire for a moment when he learns the Changlings have captured Fluttershy.
    • Discord's eyes themselves are red, and he used to be a villain.
    • In "All Bottled Up", the ponies affected by the inadvertent release of Starlight's bottled anger have glowing red eyes.
    • In season 8's "Marks for Effort", we meet Cozy Glow. She seems nice enough, but the finale proved she is evil to the core.
  • The New Adventures of Superman: "The Japanese Sandman". The titular monster (who commits evil acts in return for a black pearl) has red eyes.
  • Ninjago: Masters of Spinjitsu. All the skeletons, Lord Garmadon and the Hypnobrai tribe have glowing red eyes.
  • In The Penguins of Madagascar special, "Dr. Blowhole's Revenge", Skipper activates a King Julien robot decoy.
    Skipper: Glowing red eyes. That's almost never good.
    (the robot explodes)
    • In "The Hoboken Surprise" all the animals are replaced with robots with red eyes.
  • The first season of Pound Puppies (1980s) featured a villain named Captain Slaughter in some episodes. All we could see of his shadow-obscured face was a pair of sinister red eyes.
  • The Powerpuff Girls (and its anime and comic counterpart) gives us Brick of the Rowdyruff Boys. True to this trope, Brick, while not necessarily evil, does love to cause destruction and hurt others (well, in the show and anime at least, the comic may avert this).
  • Though a number of ghosts from The Real Ghostbusters have these, probably the most notable example is "The Umpire" from "Night Game". While for the most part a neutral judge and even a Reasonable Authority Figure, his eyes glow bright red once and only once: when Peter so much as implies a human soul isn't the most valuable thing in existence. Peter immediately takes it back.
  • Samurai Jack has Mad Jack, Aku's embodiment of Jack's own dark side.
  • Scooby-Doo:
    • Scooby-Doo, Where Are You! episode "A Gaggle of Galloping Ghosts". The Gypsy Fortune Teller, who turns out to be the episode's villain in disguise, has red eyes.
    • Some of the ghosts from the Chest of Demons that Scooby and Shaggy are tasked with recapturing after being tricked into releasing them in The 13 Ghosts of Scooby-Doo have red eyes.
      • Maldor the Malevolent in "Scoobra Kadoobra" starts out with yellow eyes, but at one point his eyes turn red when he glares at Daphne. A bit later, his eyes stay red for the rest of the episode.
      • The Reflector Specter from "Reflections in a Ghoulish Eye" is a hideous red-eyed demon who hides in mirrors.
      • Marcella, who is recaptured by the gang in the episode "When You Witch Upon a Star", has red, pupil-less eyes.
    • The evil clones of Mystery, Inc. in the What's New, Scooby-Doo? episode "A Scooby-Doo Valentine" have red eyes.
  • She-Ra and the Princesses of Power:
    • Hordak's eyes are a flat red glow, without iris or pupil. He's the Big Bad.
    • When corrupted by a First One virus, Adora gains these in her She-Ra form. Corrupted Adora is The Berserker, and is generally best avoided; in She-Ra form, Adora can break rocks, and while corrupted, she has absolutely no goals beyond mindless bloodshed.
    • Averted with Entrapta. While she has dark red eyes and wears a creepy, red-eyed welding mask, she's True Neutral and most of the damage she causes is in pursuit of learning something new, as opposed to evil; indeed, she ends up as a Token Good Teammate to the Horde after her defection.
  • In Slugterra, the eyes of mecha-beasts turn red when they are ghouled; as seen in "Mecha Mutiny".
  • Dr. Julian Robotnik from Sonic Sat AM has a pair of red cybernetic optics that shine like hellish spotlights in the dark.
  • Squidward, Plankton, and Man Ray from SpongeBob SquarePants. Averted with Gary. Ironically, the former two are now the most sympathetic characters on the entire show.
  • Star Wars: The Clone Wars Season 3's Mortis trilogy has the Son, Anthropomorphic Personification of The Dark Side, combined with black sclera.
  • Superfriends:
    • The 1973 episode "Menace of the White Dwarf". The evil Mad Scientist Raven (who acts more like a Comic Book supervillain than any other opponent the Superfriends faced during this season), has red eyes.
    • The evil Superman from the 1979 episode "Universe of Evil" has red eyes as well, and for bonus points, they're ringed in black, with freakin' huge demonic points. Evil!Batman and Evil!Robin also have red eyes in place of their good counterparts' plain white eyes.
  • Teen Titans:
    • Trigon, very bad dude indeed.
    • Brother Blood, Big Bad of the third season, has eyes that glow red when he uses his Psychic Powers; in the fifth season, the mechanical eyes on the skull-"face" on the Brain's life-support pod also glow red when the Brain is interfacing with his computers or is just angry.
    • Red Star's eyes are normally green, lacking pupils or whites. When his uncontrollable and incredibly destructive radioactive powers start to activate, they glow red.
    • Raven isn't evil and her eyes are normally a deep purple, but when she goes One-Winged Angel her eyes glow solid red. And suddenly there's four of them. Makes sense since Trigon's her dad.
  • Nearly all the Decepticons of the original Transformers (notably the original cartoon) had red optics. Later versions had a bit more optical variety.
    • The episode "Attack of the Autobots" had the Brainwashed and Crazy Autobots' optics turn red, being restored to their normal blue when cured.
    • Transformers Animated has all red-eyed (or in the case of Soundwave, red-sunglassed) Decepticons like the original cartoon, with the exception of the technically-not-a-Decepticon Swindle, who has purple eyes. However, Sari Sumdac, a human child, also appears to have red eyes. They turned blue after she "upgraded" herself. Also, in Animated, Wreck-Gar's eyes turn red when he briefly became a Decepticon due to his Funny Schizophrenia and being incredibly suggestible. An interesting example occurs in Wasp. Originally, he had blue eyes, but after his stay in prison (and subsequent madness and desire to turn Bumblebee into iron filings), they become purple. And what color do you get when you mix red and blue?
      • The Autobots' eyes also turned red when they were brainwashed by Soundwave into being evil.
    • Pops up a few times in Beast Wars', despite bots like Rattrap and Rhinox just normally having red optics, to warn you things are about to get real. When Megatron becomes a transmetal the first you see of him are his glowing red eyes against a silhouette, Silverbolt's eyes are normally gold but when Blackarachnia was killed and he uttered Tarantula's name in a vengeful manner they turned red, and most notably when Rhinox is reprogrammed as a Predacon his normally wise red eyes glow blood red for very good reason.
    • False Convoy in Transformers: Return of Convoy is distinguished from Optimus Prime by having red eyes instead of blue.
    • Shattered Glass, of course, reverses this, with the Decepticons mostly having blue optics and the Autobots mostly having red ones. Though there are a fair number of green, yellow, and other oddball optic colors on both sides, and Heatwave strangely has red optics despite being a nice guy, even by his fellow Decepticons' standards. Turns out, it's because he's not actually from the SG universe at all.
  • In Winx Club , although Bloom is a friendly, easygoing and calm girl, if you commit the mistake of pissing her off enough (and trust us, it's very hard to achieve it) you'll see LITERAL FLAMES coming from her eyes...

 
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Count Dracula (BBC '77) [Vampire Red Eyes]

Edited clips from the 1977 BBC version of Count Dracula. Vampirisim may keep you young and give you powers, but gives you a severe case of the red eyes.

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