Those who have been Conditioned to Accept Horror in Western Animation.
- Amphibia: The frogs largely understand and accept that their world is a Death World and more often than not embrace death with open arms. For example, when Anne fakes being sick, the Plantars are actually very quick to accept that they're going to die.
- Batman: The Animated Series: The original version of Harley Quinn seems to have a case of this (mixed with a fair amount of Love Martyr), as she even has a musical number in one episode where she talks about the various ways the Joker abuses her and how she can't bring herself to leave him so has decided to just put up with it.
- On Disenchantment the population of Dreamland is disturbingly indifferent to the widespread plague in their city. The "Plague Patrol" that picks up corpses to be dumped in a pit and burned is treated as just another worker on the streets. Bunty even cheerfully talks about cleaning up one of her children before having him thrown in the pit, along with his little friends.
- Though it's an example of Black Comedy to us, can we take a moment to consider how society in Futurama got to the point where suicide is so widespread that they even found a way to capitalize on it with Suicide Booths and that no-one in the setting calls attention to them?
- The Grim Adventures of Billy & Mandy: In Billy & Mandy's Big Boogey Adventure, Grim manages to obtain Horror's Hand, which requires someone to face their greatest fears, because he faces his worst fears every day: being around Billy and Mandy.
- Jellystone!: Doggie Daddy at one point asks if he's being too smothering to Augie, whose response heavily implies that she's so accustomed to his behavior that she can't process anything unusual about it.
- Kipo and the Age of Wonderbeasts: In "Twin Beaks", the raccoons have come to calmly accept that their home is going to constantly come under attack by a giant monster that they can't stop. This is shown when the bird in question breaks through the ceiling and eats a pair of raccoons, and the rest just keep pedaling without even missing a beat. It takes the characters some work to trick them into helping themselves and break this worldview.
- Played for Laughs in Milo Murphy's Law: the title character was Born Unlucky, and has come to cheerfully accept the weird and dangerous things that are going to happen to him every day. His family and friends also fall into this trope, due to having to cope with every disaster alongside him. This is most evident in Zack, a Logical Latecomer who becomes Milo's friend in the first episode:Zack: AAAGGGHHH—wait, why aren't you screaming?!
Milo: I find it doesn't help. Just hurts the larynx. - In My Little Pony: Friendship Is Magic, this is how the citizens of Equestria feel about most random monster attacks. Slice of Life has them feeling mildly inconvenienced at worst by a bugbear attack.Matilda: Come on! We better get to the salon before that monster flattens it!
Bon Bon: What was that?
Lyra: There's some monster attacking Ponyville or something.
Bon Bon: What is it this time? A creature from the Everfree Forest? - The Owl House: The Demon Realm is a Crapsack World ruled by a tyrant with an iron fist and a rigid Mutually Exclusive Magic system. In "Hollow Mind", Eda explains that while such tyranny is obvious to an outsider like Luz, to everyone else the system has been in place for 50 years since Belos came into rule. They can't see anything wrong with it without concrete proof. Of course, that doesn't mean some Witches aren't able to see how wrong the system is, such as Eda herself.
- The Real Ghostbusters: Word of God states that this is the reason the Ghostbusters were able to look at Cthulhu (or rather, Cathulu) without going insane. Their job has already forced them to come to terms with the existence of countless other Eldritch Abominations — to them, Cathulhu is just another deity to bust, if one so powerful that their proton packs barely scratch it and it takes 100 gigavolts of lightning just to put it back to sleep.
- Played for Laughs in the Regular Show "Brilliant Century Duck Crisis Special", where after six seasons of facing eldritch horrors Rigby's only reaction to Pops claiming he was attacked by a dinosaur is "Have we seen one of those before? Huh, I guess today's the day." And sure enough, the Photo Montage at the end of the episode has them fighting dinosaurs.
- Rick Sanchez from Rick and Morty, as a result of his genius and experiencing all kinds of fucked up scenarios man was not meant to know, has become detached and very cynical about pretty much everything. Later on, Morty and the other Smiths become more numb to the horrors of the multiverse as such things become more habitual.
- In the final season of Samurai Jack, the Daughters of Aku have been raised and trained from birth to hold the Samurai’s death more important than anything else, including their own and each other’s lives. Conversely, they're baffled when they witness two deer nuzzling each other and can't comprehend why the larger isn't killing and eating the smaller.
- In South Park, every parent in town except Sharon Marsh regarding school shootings.
- SpongeBob SquarePants: In "Ghost Host", the Flying Dutchman makes a habit of scaring SpongeBob while he stays with him while his ship gets repaired. Over time, SpongeBob gets less scared of the Dutchman's antics to the point where he becomes unfazed at even his most elaborate horrors.
- Steven Universe:
- Pearl likes to wax lyrical about Gem culture, despite it psychologically oppressing her people and causing her inferiority complex. Much of her character arc is about Pearl bridging the dissonance between what she actually feels and what Gem society says she "should" feel.
- Steven Quartz Universe himself shows signs of this in a few episodes, bouncing back from encountering all sorts of dangerous things as he gains more experience adventuring with the Crystal Gems. In "Space Race", Pearl apologizes for dragging him along on a test flight in a home-made spaceship and nearly getting the both of them killed, and Steven shrugs it off with "I'm used to it." Other episodes, however, show that Steven's not dealing with things as well as he lets on. It comes to a head in Steven Universe: Future, where the dangers of normalizing trauma are shown in full force.Steven holding Amethyst's poofed gem: Is it weird that I'm getting numb to this?
- The citizens of Apokolips in Superman: The Animated Series have been so thoroughly crushed by Darkseid's tyranny that when Superman defeats him and tells them to Do with Him as You Will, they immediately rush to Darkseid's side to help him get medical treatment rather than comprehend life without him.
- Most veteran adventurers, villains, and henchmen in The Venture Bros. are generally unphased by horrible death and dismemberment, shrugging it off as little more than an occupational hazard. Specific example when Rusty is mind-controlled and forced to attempt suicide repeatedly for hours. While the isolation and powerlessness would be enough to break an average person's will, Rusty explains that his childhood trauma has inured him to such mental anguish. Helping immensely is that compared to most other boy adventurers? Rusty was able to live a functional life in spite of his trauma.
