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Despite all of the hardships and struggles that happen throughout Demon Slayer: Kimetsu no Yaiba, there's still lots of humorous and wholesome moments that pop up in the series and will definitely give readers a good laugh.


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    In General 
  • Tanjiro's kind attitude gets on many jerkasses' nerves because they all expect him to do something different.
  • Inosuke repeatedly fails to learn his comrade's names, even when showing concern:
    (Tanjiro is launched into the air during combat with a demon.)
    Inosuke: "Kentarooo!"
    • In the manga, at one point, Inosuke gets Zenitsu's name right. Zenitsu remarks he should just change his name to Monitsu already.
  • Zenitsu in general, with his frequent Comical Overreaction and screaming and crying. His entire appearance in the first trailer of the anime even has him screaming left and right.
    • Zenitsu is such a whiny coward that at one point (in Episode 11, mind you) even a scared little boy stopped being frightened to ask him what the hell was wrong with him.
  • Hotaru Haganezuka's descent into madness over how Tanjiro keeps breaking his swords.
  • Nezuko's facial expressions. Especially whenever she just blankly stares while her eyes turn into black dots. Or when anyone else's eyes turn into black dots for that matter.

    Final Selection Arc 
  • Episode 2 - Trainer Sakonji Urokodaki:
    • Tanjiro, wanting to travel during the day, asks a farmer if he could purchase some bamboo and a broken basket to carry Nezuko in. The farmer tells him he can just take them for free, resulting in a bit of back and forth from Tanjiro insisting on paying before he just forcibly gives the farmer the money and takes the items, thanking him.
    • Tanjiro adjusting to his now-demonic sister Nezuko, who just dug a hole in a cave to avoid the sunlight.
      Tanjiro: My kid sister's turned into a mole.
    • He makes a basket for her to go into. At first, Nezuko crawls out, shoves her head into it, and lies on the ground. Visualize digging your head under pillows and lying on the bed.
    • Tanjiro and Nezuko stumble across a small temple where a demon's busily eating a couple of people. While Nezuko is frozen, drooling, and trembling in the grip of her Horror Hunger, the demon tackles Tanjiro. Her big brother's pained gasp snaps Nezuko out of her trance, and the dainty little girl proceeds to kick the demon's head clean off in a prosaic and downright absurd way that clashes perfectly with the tense, horrific situation.
  • Episode 4 - The Final Selection:
    • Teoni asks what year of the Meiji period it is. A confused Tanjiro explains that it's Taisho now. Teoni promptly throws a tantrum ("Not again!") over how long he was trapped on the mountain. Not funny by itself, until he explains that he was captured during the Edo period, meaning this has happened before. (The procession goes Edo - Meiji - Taisho.)
  • Episode 5 - My Own Steel:
    • The survivors of the Final Selection are assigned their Kasugai Crows. Zenitsu is left to wonder why he got a sparrow instead.
    • Tanjiro struggles his way back to Urokodaki's house so he can see Nezuko again. As he arrives, Nezuko kicks the door down.
    • The swordsmith Hotaru Haganezuka's violent reaction to Tanjiro's sword not turning red like he wanted but black, outright trying to strangle him.

    Asakusa Arc 
  • Episode 7 - Muzan Kibutsuji:
    • Tanjiro is overwhelmed by how modern Tokyo is. His facial expression when first arriving in Asakusa is priceless.
  • Episode 8 - The Smell of Enchanting Blood:
    • In the previous episode, Tanjiro took a break from the crowds of Asakusa to enjoy a bowl of udon, only to pick up Kibutsuji Muzan's scent. After returning from the encounter, he gets yelled at by the shopkeeper for darting off without even eating the udon. Tanjiro makes up for it by ordering two bowls and enthusiastically eating both of them, and all is forgiven.
    • When Yushiro shows up to lead Tanjiro to Tamayo's clinic, he refers to Nezuko as an eyesore. Tanjiro, ever the proud big brother, takes an EXTRAORDINARILY long time to process the fact that, yes, Yushiro was indeed talking about Nezuko. He then spends the entire trip to the clinic angrily demanding that Yushiro take a look at Nezuko in better lighting so he can see how beautiful she actually is. Yushiro is blank-faced even with Tanjiro yelling in his face, still unimpressed, and just escorts them to Lady Tamayo while Tanjiro's still yelling at him.
      Tanjiro: She was the beauty of our hometown! Our Nezuko!
    • Even better, Tanjiro is still on a rant by the time they actually get there. And Yushiro's still ignoring him.
      Tanjiro: Oh, I know what it is! It's [Nezuko's] muzzle, right!? It might be because of this muzzle! I'd like you to behold Nezuko without the muzzle!
    • As it turns out, Yushiro is madly in love with Tamayo. So, he's bound to see others like Nezuko as an eyesore in comparison to her.
    • When Tanjiro learns that Tamayo spent over 200 years studying demons, he's completely blindsided by this information and asks how old this means she is. Cue Yushiro immediately socking him in the gut.
      Yushiro: You should know better than to ask a lady her age!
    • Nezuko playing on the floor while Tamayo speaks to Tanjiro.
  • Episode 9 - Temari Demon and Arrow Demon:
    • Yushiro in the middle of Tanjiro fighting suggests to Tamayo they use him and Nezuko as decoys to run away. Tamayo is stunned and horrified at the suggestion. Yushiro then quickly backpedals and insists he was joking, though it's clear he meant doing that.
  • Episode 10 - Together Forever:
    • While Nezuko hugs Tamayo following the fight against Susamaru and Yahaba, she also pats Yushiro's head, much to his displeasure.

    Tsuzumi Mansion Arc 
  • Episode 11 - Tsuzumi Mansion:
    • Zenitsu's Establishing Character Moment in the opening. Of course, it was established in the previous episode as a cliffhanger, but here, it is presented as its whole. For context, Zenitsu is on his knees, sobbing while pathetically begging for a random young woman to marry him. So, Tanjiro just drags him from her to break it up.
    • Overall, Zenitsu left such a pathetic first impression that Tanjiro can only respond with a look of disgust.
      Zenitsu: What's with that look on your face? Stop it! Why are you staring at me like I'm a creature or something?
    • Zenitsu gets scared when he hears Tanjiro's crow speak.
    • Zenitsu opens one of the doors inside the mansion and finds a shirtless boy with a boar mask (later revealed to be a Demon Slayer named Inosuke Hashibira) and believes him to be a monster. The "monster" then wildly runs away from the room.
  • Episode 14 - The House with the Wisteria Family Crest:
    • After Tanjiro arrives in time to stop Inosuke from killing both Zenitsu and Nezuko, he tells him that Demon Slayer Corps members don't point their swords at each other without a reason. Inosuke's reaction? Attempting to fight Tanjiro barehanded.
    • Tanjiro and Zenitsu's reactions to Inosuke's face.
    • Teruko commenting on how hardheaded Tanjiro is following him headbutting Inosuke to stop him from fighting any further.
    • After Inosuke recovers from his concussion, he is extremely focused on getting a rematch with Tanjiro and refuses to help bury the dead. Tanjiro assumes Inosuke won't help because of his wounds and offers to let him rest while the others continue their work. Inosuke, feeling patronized, angrily chooses to help with the burial.
      • When Inosuke wakes up and starts running around, Zenitsu runs behind Teruko and comically uses her as a shield.
      • Also, a bonus to the scream Inosuke belts out when he wakes up.
      • Then there is Zenitsu's comment:
        Zenitsu: Those two are beyond help! They're both crazy!
    • The three kids after having encountered literal demons decide to stop questioning things.
      (When Tanjiro's crow comes with new orders)
      Shoichi: That crow is talking!
      Kiyoshi: Just don't think anymore.
      Teruko: Okay.
    • Zenitsu begs Shoichi to not leave him behind since he is the only one who can protect him, unaware of his own combat trance.
    • While Tanjiro and Zenitsu say their goodbyes to Shoichi, Kiyoshi, and Teruko, Inosuke is running and hitting his head on the trees.
    • Tanjiro's crow vomits out a baggie containing wisteria (a flower that demons absolutely abhor) onto Kiyoshi's hands for protection against demons. The poor boy is rightfully grossed out.
    • The conversation between Inosuke and Tanjiro on the way to the titular house eventually just demonstrates that even Tanjiro has limits to his patience. It's just as funny in the English dub.
      Inosuke: Come on and fight me! I swear I'm gonna find your weak point and bring you down!
      Tanjiro: I have a name, you know! It's Tanjiro Kamado!
      Inosuke: All right, Gonpachiro Kamaboko. I'm gonna bring you down!
      Tanjiro: (gets even more annoyed) Who are you talking about?
      Inosuke: You, of course!
      Tanjiro: No, you're not!
      Zenitsu: (finally having enough after trying to be unconscious on Tanjiro's shoulders) EXCUSE ME! COULD YOU KEEP IT DOWN, PLEASE!
    • Zenitsu's reaction only brings up the question of what exactly Nezuko's reaction to all this has to be considering she's trying to sleep in her box.
    • After the crow brings Tanjiro, Zenitsu, and Inosuke to the titular house and tells them they should rest, Inosuke suggests eating the crow, which panics.
    • Zenitsu believes that the old woman at the house is a monster since she went too fast in all rooms to give the three food and clothes.
    • How Inosuke decided to join the Demon Slayer Corps: he defeated a member of the Corps and took his sword. Tanjiro and Zenitsu are shocked. Then he entered the Final Selection because of wanting to fight demons.
    • Zenitsu meets Nezuko for the first time and realizes that what he protected from Inosuke was not just a demon but a cute girl as well, furiously ranting at Tanjiro for traveling with such a cute girl and attempting to purge him for this reason and also for interrupting his "marriage proposal" 3 episodes ago as well as sending Shoichi* back home.
    • Inosuke's own reaction to seeing Nezuko is deciding that he's had enough thinking for one day and promptly falls asleep, leaving Tanjiro and Zenitsu to deal with each other.

    Natagumo Mountain Arc 
  • Episode 15 - Mount Natagumo:
    • When Zenitsu sees Nezuko again he's all lovey-dovey towards her and starts chasing her when the latter is creeped out. Then Tanjiro, being the nice big brother he is to Nezuko, gets in Zenitsu's way and tells him to stop doing that. So, what does Zenitsu do? He starts chasing Tanjiro around as well. The poor guy is understandably freaked out as well. Zenitsu did all this with a lovesick expression on his face and while surrounded by pink flowers, no less!
      • Then, Inosuke comes in, headbutts Tanjiro in the back, and starts chasing Tanjiro and Zenitsu while Nezuko looks at them with a priceless expression.
    • When the old lady at the Wisteria Crest house strikes sparks for the three for good luck, Inosuke tries to attack her but is stopped by Tanjiro.
    • Zenitsu is predictably scared and initially refuses to join Tanjiro and Inosuke as they venture up the mountain and calls them abnormal for not being scared.
    • When Tanjiro and Inosuke meet Murata, the latter complains that the Corps didn't send a Hashira and sent low-ranked members instead. Inosuke punches him and threateningly asks Murata to fill them in on the situation.
    • How Zenitsu breaks out of his fear:
      Ukogi: Tut-tut-tut-tut-tut. Tut-tut-tut-tut. Translation
      Zenitsu: Lucky you. You don't have a care in the world. You don't understand a thing about humans, do you?
      Ukogi: (takes offense and bites Zenitsu's hand)
      Zenitsu: OUCHOUCHOUCHOUCHOUCHOUCHOUCH!!!! YOU'RE NOT CUTE AT ALL!! I MEAN IT! ESPECIALLY THAT SIDE OF YOU!!! SERIOUSLY! YOU'VE GOT ZERO CHARM! (Zenitsu places Ukogi on his hand and the latter turns his head with an angry glare) I mean, look how cute Nezuko is, and she's a demon! But you're a sparrow and you're so viscous! (Pauses and thinks about Tanjiro carrying the box containing Nezuko) AAAHH!!! HE TOOK NEZUKO WITH HIM!! (Zooms off while Ukogi tries to catch up) Why did he have to take my precious Nezuko with him! Unbelievable, Tanjiro! Don't take a young girl in danger! IDIOTIDIOTIDIOTIDIOTIDIOT!!! NEZUKO-CHAAAAAAAAAAAAN!!!!!
  • Episode 16 - You Must Learn One Thing:
    • Inosuke is pissed off at Murata for calling him a stupid boar.
    • When Inosuke saw Tanjiro's ingenious plan on how to prevent the unfortunate comrades under Mother's influence from attacking any further,note  Inosuke insists on giving that a try. Cue him dropping his swords and getting one of them to chase him and Inosuke laughing and dancing like a maniac while that happens.
      • Finally when he boasts about his deed to Tanjiro:
        Tanjiro: (still fighting one of the controlled students) My bad! I kind of missed it!
        Inosuke: WHAT?!
        Tanjiro: I mean, you can't really blame me!
  • Episode 17 - You Must Master a Single Thing:
    • The Elder Brother Spider starts off properly sinister for an evil brain but this breaks when he sees Zenitsu's behavior. He is sincerely confused as to how this cowardly and crying kid became a demon slayer, and why this coward climbs up a tree, which he then hugs, within literal spitting distance of his own perch. His Evil Gloating turns into this what-the-hell expression. He is actually happy when Zenitsu goes into a combat trance because a competent demon slayer trying to kill him makes more sense.
  • Episode 18 - A Forged Bond:
    • While Tanjiro and Inosuke's fight against the "father" demon is arguably a tense moment, as is the part where it ends up tossing Tanjiro to a different part of the mountain (where he ends up facing Rui), Inosuke's attempt at screaming Tanjiro's name is undeniably a funny moment.
      Inosuke: KENTARO!
    • Inosuke is having trouble against the "Father" Spider Demon because he can't cut into his skin, leading him to panic, hide, and try to think of a solution. As he contemplates waiting for Tanjiro to arrive while running, Inosuke stops in his tracks and realizes that he's not even acting like himself by thinking and trying to use his head, leading him to rush back to "Father" and instead start pounding on his sword with his other one in order to dig the blade deeper and successfully cut off "Father's" arm. Inosuke curses himself for being infected with "Tontaro's germs" while praising his choice of action, stating that if you can't cut something with one sword, you just pound on it with another sword.
      • Just as Inosuke starts celebrating for cutting off "Father's" arm, the latter starts to run away, an act that stuns and angers Inosuke as he starts pursuing.
  • Episode 19 - Hinokami:
    • After Giyu effortlessly defeats the Father Spider Demon, Inosuke is greatly impressed. After a few seconds, Giyu looks at Inosuke who is in awe over the former's abilities, and the former has an unimpressed expression.
    • Then, Inosuke wants to fight Giyu (despite being badly injured) and says that since Giyu beat the so-called Twelve Kizuki then Inosuke would beat him, and that would make him the strongest. However, Giyu calls Inosuke an idiot and tells him to go back to training, which predictably annoys Inosuke.
    • While telling Inosuke that the Demon which was defeated is not one of the Twelve Kizuki, Giyu prepares a rope with which he ties Inosuke up without him noticing and leaves him hanging up on a tree.
  • Episode 20 - Pretend Family:
    • After freeing Murata from the Older Sister Demon, his clothes got dissolved and he got embarrassed when Shinobu saw him, going off-screen.
  • Episode 21 - Against Corps Rules:
  • Smol Nezuko running from Kanao.
    • During the chase, Shinobu's expression shows full well how aware she is of how absurd this situation is.

    Rehabilitation Training Arc 
  • Episode 22 - Master of the Mansion:
    • Most of the Hashiras are introduced in perhaps the strangest way possible.
      • Rengoku is perhaps way too happy to have the Kamado siblings executed.
      • Tengen express his oh-so-ever flamboyant personality, saying he'll execute the Kamado siblings "with style."
      • Gyomei is seen always crying, expressing misunderstood pity toward the Kamado siblings.
      • While the other Hashira are concerned with the situation with the Kamado siblings, Muichiro is wondering about the shape of a cloud.
      • Mitsuri fangirling about the other Hashiras upon their introduction.
      • Yes, Sanemi hates demons, but it's worth noting he's coming off too sadistic when stabbing Nezuko.
    • After learning of Tanjiro's encounter with Muzan, Mitsuri is knocked down by Uzui by accident and ends up faceplanting on the ground while turning to look at Tanjiro.
      • In the manga, the expression on her face when Giyu helps her get up from the ground.
    • Sanemi asks Tanjiro about Muzan's whereabouts while holding him by the hair and shaking his head. Poor Tanjiro immediately gets dizzy.
  • Episode 23 - Hashira Meeting:
    • After Kagaya suggests that more of the Hashira will accept him and Nezuko if he defeats one of the Twelve Kizuki, Tanjro swears that he and Nezuko will defeat Muzan himself. Kagaya basically says: "I appreciate your enthusiasm, but you're nowhere near strong enough for that yet." Even the other Hashira get a laugh out of that.
    • The Funny Background Event of Nezuko in her box still fuming and upset at Sanemi for attacking her.
    • Tanjiro briefly interrupts the Hashira meeting because he wants to headbutt Sanemi as many times as he stabbed Nezuko while the Kakushi carrying him and Nezuko try to stop him and bring him to the Butterfly Estate. All while scared and lightly punching Tanjiro's head, they bow and apologize to the Hashira and the master for disturbing the meeting.
    • As the Kakushi depart while carrying Tanjiro and Nezuko, Ubuyashiki tells the boy to give his regards to Miss Tamayo. Tanjiro is shocked, while the Kakushi are furiously berating him all the way to the Butterfly Mansion for getting them in trouble with the Hashira.
      Tanjiro: Wait a second! I just heard him mention Miss Tamayo's name!
      Female Kakushi: (punching him) Don't you say another word! We got yelled at because of you!
      Male Kakushi: I thought I'd pee my pants!
      Female Kakushi: (pulling on Tanjiro's face) You don't know how terrifying the Hashira are!
      Male Kakushi: Try to read the room! Read it!
      Female Kakushi: (with tears in her eyes) I'll never forgive you as long as I live!
      Male Kakushi: I'll never forgive you!
      Female Kakushi: Apologize!
      Male Kakushi: Apologize! Apologize!
    • When the Kakushi brings the Kamado siblings to the Butterfly Estate, they ask Kanao if they have permission to enter, but Kanao is silent the entire time, so they don't know what to do.
    • Zenitsu panicking about having to take a bad-tasting medicine 5 times a day for three months since his arms and legs shrunk due to the poison of the Brother Spider Demon.
    • When Zenitsu clings to Tanjiro and complains about Aoi yelling at him all the time, his mucus gets on Goto's clothes (since he was carrying Tanjiro).
  • Episode 24 - Rehabilitation Training:
    • Zenitsu complains about Tanjiro's medicine going down easy while his medicine has a bitter taste.
    • Murata, who came to visit the trio, tells them while scared that he had to give a report on the Natagumo Mountain in front of the Hashira. He says that the Hashira are terrifying... while Shinobu enters the room. Murata immediately leaves. He is especially scared of her ever since she saw him naked following his clothes having been dissolved by the Sister Spider Demon's attack.
    • When Zenitsu finds out just what the rehabilitation training consists of (being forced into stretches by the three servant girls, testing reflexes against Kanao, and playing tag with Kanao and Aoi), he drags Tanjiro and Inosuke away and delivers a furious rant to them about how they should apologize to him since they get to train with cute girls but are still exhausted by the end of it. His ranting and raving about girls is so unabashedly horny that it loops right around to being hilarious.
      • During the actual training, which Inosuke describes as being so painful he has to fight back tears, Zenitsu can't stop smiling and laughing because he has three girls touching him.
    • Zenitsu mocks Inosuke because he has never been close to girls. Inosuke retorts that he has stomped on female children before, so yes, he has been close to girls. Zenitsu berates him for doing such a thing and tells him that doing so will not be good for him in the future and he'll never be able to pick up a girl. The English Dub has Inosuke miss the point again and says that there's no way they can be that heavy.
  • Episode 25 - Tsuguko, Kanao Tsuyuri:
    • When Tanjiro tells Zenitsu and Inosuke about Total Concentration Constant, he mentions that while they are doing it, if it rattles their blood, their bones and muscles will go "Boom! Boom" and they need to stop.
    • Shinobu has apparently gotten to know Zenitsu and Inosuke well enough that she uses their character traits to motivate them to learn the full breathing technique.
      • First she blatantly patronizes Insouke:
        Shinobu: Now now, we're talking about a basic skill, or should I say a beginner's skill. So why wouldn't you be able to do it? But it's also true that one must put great effort into mastering it, right? (Pats Inosuke on the back) Well, why wouldn't you be able to do it, though? I'm sure it will be child's play for you, Inosuke. Are you sure you can't do it? Even though there's no reason you can't do it? It can't be helped, then, if you can't do it. Can't be helped! Can't be helped!
        Inosuke: HUH!? I CAN DO IT ALL RIGHT! WHY WOULDN'T I!? DON'T MESS WITH ME OR I SWEAR I'LL RIP OFF YOUR BREASTS!
      • As for Zenitsu... well, encouragement from a cute girl was all Zenitsu really needed.
        Shinobu: (Affectionately holds Zenitsu's hand with both of hers while Zenitsu starts panicking out of shock) Please give it you all Zenitsu! I'm you number-one supporter!
        Zenitsu: (Zenitsu's face turns red from excitement as steam literally jets out of his ears in joy) YES MAMMMMMMMMMMMMM!!!!!!!!!!!!
    • Tanjiro finally manages to beat Kanao in a cup-bearing match. But just when he was about to splash water in her face, his sense of reason manifests, and mentions how cruel it would be to splash her in the face with putrid medicated water. So Tanjiro slows down and puts the cup on Kanao's head. One Beat later, and Tanjiro is celebrating with Sumi, Kiyo, and Naho on his success while Kanao is trying to process what just happened.
    • Haganezuka's back! And he's trying to kill Tanjiro for breaking his sword. Despite Tanjiro's protests about how strong the demon who broke it was, the angry swordsmith blows it off and squarely blames Tanjiro for being a weakling. Haganezuka then proceeds to chase him while swinging a butcher knife at him like Norman Bates from Psycho, while the understandably terrified boy adorably screeches for his life like a little girl. Rubbing salt in the wounds was Shinobu's deadpan commentary watching the fiasco from the side.
      Shinobu: Is this a new training regimen?
      Aoi: Probably not.
    • In the next scene Haganezuka calmed down for a bit and stopped trying to kill Tanjiro, instead he just settled for pouting and lightly hitting him on the head.
    • The introduction of Kozo Kanamori. He came along with Haganezuka to gift Inosuke with two new swords after his broke against the spider family. He's also far calmer and more civil than his fellow swordsmith... until Inosuke starts chipping the back of each blade with a rock to give them the same serrated edges as his old pair. Right in front of Kanamori, whom Tanjiro has to hold back while profusely apologizing for his friends' behavior.
    • As the two swordsmiths leave, Tanjiro is still repeatedly bowing and apologizing while Inosuke holds the back of his shirt, presumably so Tanjiro won't follow after them begging for forgiveness.
    • In Kanao's flashback to her childhood after she was rescued by the Kocho sisters, Shinobu complains about how Kanao won't do anything unless she's told and how it could prove to be a liability, but Kanae tells her that she shouldn't take it so seriously... because Kanao is so cute! Shinobu exasperatedly thinks to herself how that isn't a good reason.
  • Episode 26 - New Mission:
    • A Black Comedy example, but when Muzan is laying into the Lower Ranks for their constant failures, Kamanue (Lower Rank 6) starts to say to himself how it's easy for Muzan to criticize them since he rarely gets involved in fights himself... only for Muzan to reveal that he can hear his thoughts as he's thinking them. Cue a massive Oh, Crap! reaction from Kamanue as he thinks to himself "I'm screwed!" only for Muzan to ask him to clarify how screwed he is. And then, after Muzan messily eats him, his appendage lets out a comical Burp of Finality, something very out of place in such a serious scene.
    • Kanao flips her coin and she finds herself allowed to speak to Tanjiro and tell him goodbye. But Tanjiro, being Tanjiro, is elated by her finally talking to him and sticks around to start a friendly chat with her. Meanwhile, Kanao continuously tells him goodbye and is clearly wondering why the hell he isn't going away.
    • Tanjiro is being a literal ray of sunshine in this scene, judging by the weird glow he is emanating while asking Kanao about her coin.
    • When the group leaves the Butterfly Estate, Zenitsu assumes that Sumi, Naho, and Kiyo will be sad to see him go, but instead, they tell him point blank that he needs to learn to be more respectful towards girls. They even assure him that no, they won't be sad after he leaves.
    • Our main characters come across a train. Hilarity Ensues:
      • Seeing the massive machine bellowing out steam and making loud noises, Inosuke, who was raised in the wild, is freaked out and deduces that this thing is the monster they were sent to kill. And he tries to headbutt it.
      • Meanwhile, Tanjiro, who was raised in a rural environment and had previously been overwhelmed by the cityscape of Asakusa, proposes that the train is actually the guardian spirit of the land and attacking it is an unprovoked and unwise move.
      • Zenitsu turns out to be the only one of the three who actually knows what a train is and is dumbfounded by Inosuke and Tanjro's reactions to what is really just a mode of transportation.
      • The station's security reacts as one would expect to see three people in a public area carrying around swords; until this point, it's easy to forget that during the time the series is set, carrying swords around had actually been illegal for several decades after the Haito Edict was issued during the Meiji period.

    Mugen Train Arc 
  • Chapter 54:
    • Rengoku's second appearance:
      • he's found by Tanjiro eating several boxes of bento on the train while constantly saying how tasty it is. Tanjiro and Zenitsu find him weird.
      • The movie adds an Overly Long Gag of nearly one minute of Kyojuro saying "delicious!" ("Umai" in Japanese, "Tasty!" in the English Dub) after every bite.
      • The scene makes an appearance in the TV anime's opening sequence, with Tanjiro eating one bento and being forcibly given a second one by Rengoku, which he tries to refuse.
    • Inosuke wants to race against the train to see who is faster. Zenitsu's reaction:
      Zenitsu: There are limits to stupidity, you know!
    • Zenitsu predictably panics when Kyojuro tells the main trio that a demon is inside the train.
    • Tanjiro, Zenitsu, and Inosuke's excitement over Kyojuro's abilities and him choosing all three of them to be his Tsuguko, and they even call him "Aniki" (big brother). Doubles as Heartwarming.
  • Chapter 55: While Tanjiro, Zenitsu, and Kyojuro's dreams are either heartwarming or tearjerking, Inosuke's dream involves going on an expedition in a cave, with him being the boss and Nezuko, Tanjiro, and Zenitsu being his "underlings" and having animal forms. Tanjiro is a tanuki, Zenitsu is a mouse, Nezuko is a rabbit and they all look like characters from a children's cartoon.
    • While Zenitsu's dream is cute, it's still him having an overly romantic fantasy of frolicking with Nezuko. The guy clearly can't contain himself when Nezuko expresses worry about crossing a river due to not being able to swim and he realizes it means giving her a piggyback ride.
  • Nezuko's methods of trying to wake Tanjiro from a dream world trap involve trying to headbutt Tanjiro. Despite the fact that she's a demon and easily out-tiers him in raw physical strength, this not only doesn't stir him, but hurts her so hard that her forehead bleeds as she cries from the pain.
    • The fact that it's heavily implied that Nezuko's efforts of trying to wake Tanjiro aren't out of fear or concern that her brother and the other passengers are mysteriously under some sleep spell, but apparently she wants her brother to give her more headpats.
  • Enmu's lackeys are instructed to find the boundaries of his dream worlds for their target, cut through it to enter the subconscious, and then destroy their spiritual core to incapacitate the Demon Slayer. While Rengoku's and Tanjiro's subconscious make for some dramatic moments, Inosuke's subconscious is a cave inhabited by a much more bestial version of Inosuke himself, while Zenitsu's subconscious is pitch-black and home to a violent Zenitsu (for some reason wearing modern casual clothes—with big garden shears) who threatens anyone who isn't Nezuko.
  • Chapter 60: Zenitsu declares that he will protect Nezuko... while asleep. Her expression is priceless.
  • After Kyojuro asks Tanjiro and the others to look for Enmu and to protect the people on the train, Tanjiro finds Inosuke outside on the train. The latter says that the guy with wide staring eyes (Kyojuro) gave him an order. Then he says that Kyojuro is sorta amazing... and that pisses him off.
  • The scene itself is a heartrending tearjerker, as Tanjiro, Zenitsu, and Inosuke are all grief-stricken at Rengoku dying. However, Inosuke nearly pushes the scene into Narm territory. After Inosuke berates the other two boys for crying, Zenitsu points out that Inosuke is also crying, as he can see the tears coming out of his headpiece. Inosuke headbutts Zenitsu and insists he isn't crying before running away while flailing his swords and sobbing hysterically in what looks like the most epic of temper tantrums.
  • Chapter 69: Tanjiro transmits Senjuro his elder brother Kyojuro's message to walk the path he thinks it's right, and that he would headbutt anyone who speaks badly about him, but Senjuro tells Tanjiro he shouldn't do that. Tanjiro's expression is simply priceless.

    Red Light District Arc (AKA Entertainment District Arc) 
  • The literal Running Gag of Haganezuka trying to kill Tanjiro with a kitchen knife for losing his brand new sword returns; and since this time the latter threw it away (at Akaza) on purpose, he is much more angry... as in "chasing him with a kitchen knife in each hand and another two tied in his disheveled hair" much more angry. The twicefold Art Shift of hyperrealism accentuating his vein-bulged muscles followed by a crudely-drawn chase-sequence straight out of The Road Runner Show only amps up the absurdity as the crazed swordsmith chases the poor boy for hours from sunset to sunrise.
    • On YouTube, several of the comments for that scene are joking that, if somebody told Haganezuka that Muzan and/or the Twelve Kizuki broke Tanjiro's sword, all of them would be dead in seconds.
    • The next morning, Tanjiro is too tired to eat, so Inosuke demands his portion...and still asks for seconds when Aoi is offering them...and asks for mitarashi dango when the girls mention Haganezuka is having some.
  • In the beginning, we have Uzui try to take some girls from the Butterfly Estate for a mission to the Entertainment District. The entire scene is very silly, with Uzui kidnapping Aoi and Naho while Sumi, Kiyo, and Kanao grab onto him to slow him down. When Tanjiro intervenes and charges at Uzui, he Flash Steps out of the way and onto the roof, leaving Tanjiro, Kanao, Sumi, and Kiyo floating in empty air for a second before falling to the ground.
    • When yelling at Uzui to release the girls, Tanjiro makes an adorable pouty face and Uzui responds, "Don't you pout at me!" (or, depending on translation, "Don't make that face!")
  • The beginning of Episode 35 has Tengen proclaim that he is the god of flashiness and festivals and that the trio are trash.
    Tengen: That's the first thing you need to pound into your heads! Drive it in!
    (Cuts to Tanjiro, Zenitsu, and Inosuke depicted as cute puppies)
    Tengen: You're to turn into dogs if I tell you to!
    The Trio: BOW BOW BOW BOW!
    (Shows the trio depicted as monkeys)
    Tengen: Turn into monkeys if I say so!
    The Trio: Monkey!
    (Shows the trio hunching over and rubbing their hands complete with Asian Buck Teeth of all things)
    Tengen: Hunch over and rub your hands together, constantly pander to my every whim and suck up to me with every fiber of your being!
    Tanjiro: You said it.
    Zenitsu: That's our Lord Uzui all right.
    Inosuke: Yep.
    • Also, after Inosuke introduces himself as the King of the Mountains, there is this:
      Tengen: (weirded out) What are you talking about? You sure are creepy.
      (Image of lightning striking above Zenitsu)
      Zenitsu: (internally; thunderstruck) NO! You two are a close match for each other! Cringeworthy!
      Inosuke: (ticked off) HUH?! What did you say?!
      Tanjiro: (physically restraining Inosuke) Back off, Inosuke!
      Tengen: Creepy.
      Inosuke: Let me go Konpochiro!
    • Bonus goes to Zenitsu's internal monologue in which he calls out Tengen for being crazy.
  • Prevented from taking the Butterfly Estate girls, Uzui takes the male trio with him instead, to act as a servant girls in the brothels. The three boys end up being liked by people there for different reasons:
    • Tanjiro for being super nice and helpful. This continues to work for him despite the establishment discovering his scar (which is obviously a big minus for oiran beauty standards).
    • Zenitsu for being good with instruments. And the madame even assumes that "she" is that good to get revenge on the man who "abandoned her".
      • The anime ups this up a bit by showing that Zenitsu's resentment against Uzui is such that not only is he playing the shamisen very passionately, but the sounds he's emitting are also practically becoming rock music.
    • Inosuke got scouted right from the beginning even when his face is covered in ugly makeup. The madam even celebrates 'getting him on the cheap' when they discover that he is very pretty-looking. But he has to pretend to be mute (which he doesn't enjoy) because his gruff voice will instantly give away that he's a boy.
  • We learn that Tanjiro is so honest that whenever he lies, it'll show, as his face gets all strained as if he's either constipated or about to break into laughter. The scene where he asks the other oiran about Suma shows that. So, watch it in all its glory.
  • Throughout most of the arc, the Running Gag of Uzui gets pissed off and/or hits Zenitsu and Inosuke whether they question him about something or show annoyance at him.
  • Zenitsu is angry at Uzui when he finds out the Hashira took them to find his wives. He mistakes the mission details as Tengen ordering them to find women for him to marry while he does actual work, which Tengen angrily corrects him on.
  • And then there's Zenitsu's reaction to Tengen having three wives:
    Zenitsu: Did you say "wives"? And three? THREE! THREE! THREE WIVES!? THERE'S NO WAY!! HOW DID YOU OF ALL PEOPLE MANAGED TO GET THREE WIVES!? IS THIS SOME KIND OF SICK JOKE!?
    Uzui: (punches Zenitsu in the gut)
  • Tanjiro is surprised that Koinatsu, one of the Oiran, easily realizes that he is a boy.
  • Inosuke deciding to take action regarding the demon in the house he's infiltrating begins with him utilizing the spirit of "Coming through"...which starts off with him jumping through the ceiling headfirst with the rest of his body remaining. The situation then escalates with him calling for some muscular mice trained by Uzui to bring him his swords. They even have the same headband as Uzui. The situation is every bit as ridiculous as it sounds.
  • While Uzui is fighting Gyutaro, Zenitsu and Inosuke appear. Tanjiro asks them to help Uzui and Inosuke says that they will flamboyantly help him (Uzui uses the term a lot). The Narrator notes that Inosuke is a boy who is easily influenced.
  • After Makio, Suma, and Inosuke manage to make Daki retreat, Suma starts panicking that she will be the first to die and she can't be counted on to save people and Makio yells at her to stop yelling. It gets funnier when Inosuke of all people is shocked the entire time.
  • Along with Awesome, Zenitsu spends the whole fight from start to finish against the demons completely asleep/in a trance... while still wearing his girl disguise, complete with the pigtails and blush make-up. The fact that he becomes more competent and serious makes it even more Awesome and Hilarious.
  • Coupled with Awesome, there's enough schadenfreude to be had when Nezuko, in a repeat performance (similar to their very first demon), comes to Tanjiro's rescue to disable Daki. However, whereas she merely kicked off the head of the earlier demon, her kick to Daki's head has enough speed and power to disintegrate her upper cranium. The sound effect would make even a kick from Inazuma Eleven (or even a punching Stand from JoJo) jealous.
  • When Uzui arrives as Tanjiro is trying to hold down Nezuko, he seems to be angry less that he was fighting a demon way above his supposed skill set, and that clearly Nezuko's not as controllable as he promised to the Hashira. The way it's portrayed, however, doesn't really cast it as serious.
  • The anime adaptation at S2E10 (coming after the climax of the fight between Daki and Gyutaro) ends with the entire block blowing upwhile Tanjiro is dying of poison and his injuries. The air is sombre enough that the closing credits just run, with just the orchestra, as the burning carnage goes on. What best then to follow but a Taisho Secret segment hosted by the dream "human" Nezuko, sweetly speaking around while Tanjiro is dying in front of her?
  • Chapter 95: Having spent the fight against Daki and Gyutaro in his trance mode, Zenitsu, when he wakes up, cries and complains that his whole body hurts and he is unaware why his legs are broken.
    • After the fight against Daki and Gyutaro, Uzui is poisoned and waiting to die. He tries to say his last words but can't because his wives keep crying, screaming and fighting each other while ignoring him (Suma is sobbing loudly in an over-the-top fashion, Makio is angrily yelling at her to shut up and threatening to stuff rocks in her mouth, and Hinatsuru is trying to calm them both down). His nearly-popping veins say it all.
  • Nezuko suddenly sneaks into the little crowd and sets Uzui on fire with her Blood Art (which only burns demons). While she was doing it to burn away Gyutaro's poison, the wives reacted as expected due to not knowing this.
    Suma: (hysterically shaking Nezuko) What do you think you're doing? Who are you, anyway? Isn't it way too early for a cremation?! He isn't even dead yet and you're burning him! I'm going to spank you! Big sister's very angry with you, young lady!
  • A little bit of Dark Comedy with a tinge of fond and bittersweet heartwarming, considering the context and what happens next: In their final moments, Daki and Gyutaro argue and insult each other for being too weak and having lost. Reactions from readers are all along the lines of "Yup, they're siblings, alright."

    The Swordsmith Village Arc 
  • Chapter 99:
    • The introduction of Doma in the current events, as creepy as it is, just cannot be taken seriously. Not only does he express his ever-so fake "friendly" attitude towards Akaza, but he gets way too close to him, to which Akaza understandably tells him to get his hand off of him, right before Akaza socks Doma's jaw clean off.
    • After Kokushibo and Akaza return to their places and Gyokko and Hantengu are teleported to the place for their assignment, Doma remains at the Infinity Castle, which prompts him to ask Nakime if she is willing to hang out with him. Her response? "I respectfully decline.", as she teleports Doma back to his place.
  • Chapter 100: While Goto says that he highly respects Tanjiro, Nezuko, Zenitsu, and Inosuke, when he thinks about the latter, he wonders who the hell he is due to his boar mask.
    • When Gotou visits Tanjiro in the Butterfly Estate following the fight against Daki and Gyutaro to bring him some Castella (a type of cake), he sees Kanao next to him. Then he notices Tanjiro woke up and yells at Kanao for not having told anyone that Tanjiro regained consciousness, much to her shock.
    • Afterwards, Tanjiro inquires on the status of his comrades. Aoi tells him that Zenitsu has already recovered and left, while Inosuke had been horribly poisoned and was on the verge of death. Tanjiro wonders that then he must be hallucinating Inosuke clinging to the ceiling. Everyone in the room then looks up in horror to witness Inosuke crawling upside down on the ceiling.
    • Inosuke loudly praises Tanpachiro for noticing him on the ceiling, to which Tanjiro comments that he was lying flat on his back with his face towards the ceiling, so of course he would notice him.
      • The English dub of the anime has Inosuke outright ask Tanpachiro how he noticed him on the ceiling, with Tanjiro politely pointing out the obvious answer.
    • He then brags about how he woke up a week earlier than Tanjiro, because he has poison resistance, so he is immortal.
    • Funnier still is the fact that Aoi was tearful when she was telling Tanjiro about Inosuke's condition. However, after The Reveal that he is in no real danger, she is angry at him, for making them worry.
    • Apparently, according to Shinobu, Inosuke is just the same as a honey badger because both can withstand poison.
    • Kanao of all people yells at everyone to be quiet since Tanjiro fell asleep.
  • Tanjiro getting letters from Haganezuka. The letter says that he is done fixing swords for the demon slayer only to have them break again and again. And of course, the letters look as if they were written by a psychotic killer. Which is fitting for a hothead like Haganezuka.
  • Chapter 101: The Chief of the Swordsmith Village, Tecchin Tecchikawahara, asks Tanjiro to bow his head so low it touches the mat, with Tanjiro immediately does that.
    • Tanjiro meets Mitsuri, who complains that Genya ignored her.
      • The extra page for the chapter reveals that Genya couldn't say a word due to how cute Mitsuri is.
    • When Tanjiro sees Genya, he refers to him as mohawk-head since he doesn't know his name.
    • Mitsuri tells Tanjiro she has five siblings and she gets along with all of them... while tickling Nezuko.
    • Mitsuri's reason for joining the Demon Slayers: to find a potential husband who is stronger than her. Tanjiro is understandably shocked.
    • Tanjiro of all people has a nosebleed after Mitsuri leaves, caused by her whispering in his ear. He notably raises his hands a moment before this so the food on the tray he's holding doesn't get any blood on it.
  • Chapter 103: Kotetsu (a 10-year-old foul-mouthed kid) wants Tanjiro to train against the Yoriichi doll because he wants him to be stronger than that "shitty, indifferent jerk" Muichiro.
  • Chapter 104: Tanjiro receives Training from Hell from Kotetsu and almost dies from it. When he finally defeats the doll and gets a sword from it, the two boys dance in celebration before politely offering said sword to each other.
    • According to the narration, the only reason Kotetsu's training was so hellish is that being as young as he is, he still doesn't quite understand that the human body does have limits and there's no way anyone can survive a week without food, water, or sleep. Tanjiro was only able to get through it by drinking raindrops.
      • Bonus goes for the animation when Tanjiro does drink said raindrops (desperately).
  • Chapter 105: Hotaru appears from out of nowhere, extremely buffed, and is doing a pose that looks like he's preparing to kill someone. Of course, the man only wants to re-forge the sword but the way he's going at it sure is hilariously terrifying.
  • When the scenes cuts to night, Tanjiro goes on sharing his story in such a wholesome manner as panels reveal he is telling it to Genya, who is fuming with rage just by hearing him. Genya immediately responds with anger, declaring that he and Tanjiro aren't friends, and reminds him of what happened in the Final Selection when the latter breaks his arm. Tanjiro's further attempts to befriend Genya are rejected, but it reaches its peak when he asks him about his lost tooth. Genya denies it, claiming that he doesn't lose anything only for Tanjiro to show him said tooth which the latter has picked up to return to the former; Genya is further enraged, not only calling Tanjiro creepy, but kicking him out of the shared room.
  • Chapter 113: When the demonized Genya threatens Tanjiro and tells him he'll be the one to kill an Upper Rank so he can become a Hashira, Tanjiro isn't fazed and promises that he and Nezuko will give him their full support. Genya assumes that Tanjiro is just trying to make him drop his guard down so he can outdo him, only to stop mid-rant when he realizes that Tanjiro is being completely sincere.
    • Many YouTube comments have even said that Tanjiro's kindness is so contagious that Genya can't even stay mad at Tanjiro.
  • Mitsuri is shocked when Zohakuten calls her a "harlot" (or "shameless tramp" in the anime) due to her clothing.
  • Chapter 117: Haganezuka’s passion for forging swords ends up working in his favor when Gyokko enters the shed to find Haganezuka working on Tanjiro’s new sword. Seeing that the sword-smith is immersed on the sword to the point of ignoring him, Gyokko immediately grows jealous of Haganezuka’s razor-sharp focus since he has never concentrated so hard while working on his craft, and it makes him feel inferior as an artist. This leads him to waste time trying to break Haganezuka's concentration instead of just killing him when he has the chance.
  • Muichiro and Gyokko's fight has the former trash-talking the latter without remorse.
  • And when Gyokko reveals his true form, he expects Muichiro to bow in awe and wonder, but Muichiro doesn't react. Cue this banter:
    Gyokko: SAY SOMETHING, YOU WORTHLESS PUPPET!!!! QUIT PLAYING DUMB WITH ME!!!!
    (Cut to Muichiro just standing there with a bored and unfazed look that would make Saitama so happy)
    Gyokko: You really know how to rub someone the wrong way, DON'T you, brat!
    Muichiro: But, you just told me to shut my mouth earlier. Besides...it didn't really warrant a reaction.
    (Gyokko abruptly appears close to Muichiro ready to punch him bare-fisted)
    • Before that, there was this gem of a dialogue:
      Gyokko: Only two people before you have seen me in this state.
      Muichiro: Really, that many?
      Gyokko: SHUT UP!!!! NO ONE'S LIVED TO TELL THE TALE ONCE I STARTED TAKING THINGS SERIOUSLY!!
      Muichiro: How amazing.
      Gyokko: (veins bulging) SHUT YOUR MOUTH, YOU DIM-WITTED BRAAAT!!!
  • As Gyokko is decapitated, he incessantly rants on about how Muichiro is pathetic and that this is undignified. Muichiro gets him to shut up by slicing his head in two before rapidly slicing the head up into tiny pieces. After that, Muichiro rubs salt on the wound by telling Gyokko to just go to Hell already.
  • After his fight against Gyokko, Muichiro is found by Kozo Kanamori. Muichiro claims he feels great after the battle despite clearly being about to pass out. Then he foams at the mouth while Kanamori understandably panics.
  • Hantengu, the Upper Rank Four, being the coward he is, keeps evading everyone's attacks. Eventually, Genya's rage reaches a boiling point and he throws an entire tree at the demon while cursing at him.
  • Right when Tanjiro and the others have weakened Hantengu, but Tanjiro loses his sword before he can successfully finish him off, Muichiro arrives to throw Tanjiro the sword Haganezuka was working on for him. The swordsmith in question clutches Muichiro in a chokehold and yells death threats at Tanjiro to not use the sword. Never mind that an Upper Rank demon will get away if Tanjiro can't finish him off now, he's not finished with the other steps yet! Muichiro proceeds to pass out from the earlier poisoning and exhaustion, causing Kotetsu to claim Haganezuka just murdered him.
  • In the flashback of Hantengu's human past, it was revealed that, back in the past, once when he was confronted over stealing, he tried to deflect the blame from himself by blaming his own hands for allegedly "acting on their own". The sheer outrageousness of this lie is what makes it hilarious. And the very same flashback also reveals that, when he attempted to use that excuse to save himself from the Magistrate that sentenced him to death, the Magistrate stated that he'll simply have Hantengu's hands cut off then.
  • The swordsmith villagers all cry together with tears running down their masks when Tanjiro hugs Nezuko after seeing that she's okay under the sun. After sharing a moment of happiness, Tanjiro faints from exhaustion and this causes both Nezuko and the swordsmith villagers to panic for a moment.
  • While everyone is regrouping after Hantengu's defeat, Nezuko is seen smiling as she pats Kotetsu's hair.
  • At the end of the arc, Mitsuri runs over to give everyone a big hug, which makes Genya go full red on his face.

    Hashira Training Arc 
  • After gaining resistance to the sun and being able to talk again, Nezuko starts learning words and names little by little. When Zenitsu arrives, he is absolutely happy about this and attempts to get Nezuko to marry him once more now that she can talk, while Aoi doesn't tolerate Zenitsu's antics and attempts to turn him down. That is, until Nezuko mistakenly calls him Inosuke. Everyone pauses for a moment, with Aoi and some of the girls looking like they're about to laugh. Cue Zenitsu internally plotting to get back at Inosuke, while everyone else looks in confusion. The next panel then cuts to Inosuke arriving at the Butterfly Estate two days ago due to an injury and he was the one trying to get Nezuko to say his name, even calling him "Boss Inosuke", which somewhat happened to work out. It's hilarious and absolutely adorable!
  • While recovering at the Butterfly Estate and having to deal with Hotaru's madness once again for his use of the sword against Hantengu leaving permanent scratches, all seemed well for Tanjiro... Until all of a sudden, Inosuke makes a Dynamic Entry and breaks through the building window! Gotou scolds him for doing this and gives him a smack, causing Inosuke to go, "WRYYYYYYYY!". Meanwhile, Genya is quietly annoyed by all of the commotion. Inosuke busted through the window to inform Tanjiro of a training session with "lots of strong people". Tanjiro asks what he meant, to which Inosuke replies with no clue at all.
  • The Hashira meeting following the attack on the swordsmith's village has them try to figure out how to get everyone in a marked state. When Tanjiro is unable to explain how to get into the state, Mitsuri steps in. Unfortunately, she's just as bad at explaining things as Tanjiro, which leaves everyone present in silent confusion and bewilderment trying to process what she just said. Even the most stoic of the Hashira.
  • After getting out of the Butterfly Estate, Tanjiro visits Giyu at his house but the latter does not answer. Then Tanjiro loudly bursts in, startling Giyu.
  • Tanjiro going through Muichiro's training area. The sheer contrast between Muichiro's treatment of Tanjiro versus everyone else present is obvious to everyone present except for Tanjiro himself.
  • Tanjiro is able to get through most of the Hashira Training areas, but when he reaches Sanemi's training area, Zenitsu is seen panicking and asks Tanjiro to get him out of there. Suddenly, Sanemi appears right in front of them both, which causes Zenitsu to freak out before Sanemi knocks him out and tells Tanjiro to bring him back to the training area.
  • On the way to the training area, Sanemi warns Tanjiro to not get cocky and says that he hasn't accepted him yet, to which Tanjiro honestly responds back and says that he doesn't accept him either for trying to hurt Nezuko a while back. Tanjiro walks off with a proud smile on his face, but this pisses off Sanemi internally.
  • When Zenitsu wakes up, he's very mad at Tanjiro for bringing him back to Sanemi's area.
  • During the argument between both brothers Genya and Sanemi, Tanjiro is eavesdropping and quietly rooting for Genya. When Genya reveals that he's been consuming demon flesh to become stronger, this pisses off Sanemi and Genya almost gets his eyes gouged, but Tanjiro intervenes and saves Genya from Sanemi's attack. This causes Tanjiro and Genya to come crashing through the building and blows the cover off Zenitsu and the other members, who were hiding from Sanemi. After dealing a blow to Sanemi, Tanjiro gives Zenitsu a small wink to signal him to get Genya out of there, but this causes Zenitsu to freak out. Zenitsu does manage to get Genya out of the fight but calls his brother not human, which makes Genya mad and causes him to punch Zenitsu with Zenitsu responding that they're on the same side.
  • The whole fight ends with the members piling on Sanemi to stop him from fighting Tanjiro, which continues all the way until evening. The aftermath of this incident shows that Tanjiro gets a scolding from the higher-ups's messenger crow which not only puts his Wind Hashira training to a halt but also gets him banned from approaching Sanemi.
  • When starting the Hashira Training in Himejima's area, after Himejima explains the three tasks and mentions how he had to forgo the training that involved flames below them for being too dangerous, Tanjiro tells him Zenitsu passed out. Himejima bluntly tells Tanjiro to dump him into the river, which he does.
  • Then as Zenitsu is freaking out from the cold river water, he sees Murata and the members resting on some boulders. Murata tells him to hug the rocks because the rocks were warm from the sun. Zenitsu jumps onto the rocks and finally calms down, crying for his mother.
  • Meanwhile, Tanjiro jumps into the river to train under the waterfalls and sees Inosuke meditating there, but freaks out after realizing he's not doing the chants and quickly drags Inosuke out to revive him from hypothermia. Soon after training under the waterfalls, Tanjiro hugs the rocks too.
  • Tanjiro is adorably smug when Murata and the rookies compliment his cooking.
  • While Tanjiro is exhausted and lying on the ground, Genya suddenly appears over Tanjiro, which scares him.
  • During the training with Himejima, Genya teaches Tanjiro about the use of Repetitive Action, the use of a set of predetermined movements, in this case, the use of memories, to raise focus in the body. Tanjiro uses the memories of his family and Rengoku's words to move the boulder as part of their training. When Inosuke sees him do this, he decides to use Repetitive Action too. What does he think about raising focus and moving the boulder? Tempura. And strangely, this actually works! Zenitsu is absolutely appalled and fears that he'll be the only one left in training.
  • If you look carefully in the background, you can see Himejima quietly observing them behind the trees while they're talking.
  • When Tanjiro, Genya, and Inosuke are eating together, Tanjiro and Genya are talking about their training with Himejima and Tanjiro offers Genya to come along with him to see Giyu, but Genya declines and explains that he hasn't moved the boulder yet and says that he can't use the Breaths. Out of nowhere, Inosuke starts mocking Genya and calls him a shrimp. Then Genya and Inosuke get into a little fistfight, in which Tanjiro breaks it up by sitting on Inosuke, who's still trying to fight.
  • It turns out that Giyu can be just as silly as everyone else given the right moments. Right after an emotional moment of facing his doubts as a Hashira, Tanjiro asks Giyu if he is willing to have a cold soba speed-eating contest with him. Tanjiro has a valid reason for doing so (just to cheer him up), but in Giyu's perspective it's out of the blue. It then cuts to the two doing just that.
  • After finding out that Sanemi likes ohagi, Giyu thinks of giving him a bag of ohagi to get along with him and gives a little smile thinking about it. Tanjiro automatically agrees on this, but even the narrator thinks that this is a bad idea.
    The Narrator: "Someone please stop them. They'll just get in a fight."

    Dimensional Infinity Fortress Arc 
  • After Zenitsu defeats Kaigaku, Yushiro shows up along with the rookie Demon Slayers to tend to Zenitsu's injuries. The reason why Yushiro came along was because Tamayo convinced Yushiro to become support and backup, to which he complied for Tamayo, but his face shows that he definitely wasn't happy about wearing the uniform as a disguise. As a result, the rookies are left confused as to who he was and Yushiro is shown to not get along with the rookies very well. They yell at Yushiro to stop talking so negatively towards the injured Zenitsu, with Murata even trying to cheer up Zenitsu. Yushiro snarks at all their attempts, even pointing out that their loud commotion attracted the attention of Muzan's demons. Murata is shown to be average in demon fighting and Yushiro sarcastically roots for him, with Murata yelling that he'll get back at Yushiro for that.
  • During the fight against Doma, Kanao is greatly surprised when she witnesses Inosuke dislocating all of the bones in his arm to extend and slash Doma's face.
  • Upon meeting Inosuke, Doma says he looks familiar and then sticks his finger deep into the side of his own head. He's literally picking his brain trying to figure out who Inosuke is!
  • After defeating Doma, Inosuke is shown stomping on Doma's remains in a very petty and childish manner and laughing wildly before collapsing in exhaustion.
  • The next battle has Iguro and Mitsuri fighting Upper Rank 4, the Biwa Demon Nakime. The demon blocks Mitsuri's first attack with a dimensional door, but Mitsuri manages to jump over it and attempts a second attack on the demon, only to accidentally fly out of a dimensional window instead. Her angry pouting face while she flies out is both hilarious and adorable.
  • Chapter 182: Mitsuri's comical reaction after she attacks Muzan but he doesn't have any wounds.
  • Chapter 183's cover shows Zenitsu panicking about the fortress collapsing so much that his eyes go full white and starts to pull on Murata's hair.
    • Another funny reaction from Mitsuri:
      Mitsuri: (about Muzan): So scary! This guy is so scary! Scarier than any demon I've ever seen! It's like "I'mma kill you on the dot if you enter my range" or something! Oh no, I'm so scared that my words have gone weird! Himejima-san, are you here yet? I want you to hurry!
    • Yushiro's line to Mitsuri before explaining his plan to trick Muzan:
      Yushiro: Alright, listen here. I'm a demon, but I'm also your ally. If you're not stupid, then understand what's happening right now and work with me.
      Mitsuri: (thinking) I am not stupid. (to Yushiro) Okay.

    Sunrise Countdown Arc 
  • Chapter 200: Inosuke bites the hand of one of the Kakushi immediately after waking up while they mention about how energetic Inosuke is.
    • Zenitsu (who is barely conscious) asks the others to tell Nezuko that he loves her if he dies while calling her his wife.
  • Chapter 203: Right off the bat when Zenitsu meets a rehumanized Nezuko, he calls her his wife. Cue Nezuko freaking out in a manner not unlike she's thinking the "turned-into-a-demon-for-a-while" equivalent to What Did I Do Last Night?.
  • Chapter 204: Zenitsu panics when the room in the Butterfly Estate where Tanjiro is resting gets crowded due to the many Kakushi and swordsmiths coming inside.

Side Stories

    Giyu Tomioka Gaiden 
  • In the North, after learning about the demon who has been eating people, Giyu is told by the citizens that it's a bear that actually attacked. Yae, one of the citizens and the daughter of a Matagi member called Matazo who is one of the victims, asks Giyu if he is a policeman and he answers that he is a Demon Slayer. Confused, Yae believes that he is a political official, which Giyu denies.
  • When the citizens see that Giyu carries a sword, they think of calling the police while he repeats that he is a Demon Slayer.
  • The citizens believe that Giyu is the one who killed a coal burner family from the other mountain range since the suspect was a man wearing a half-and-half haori. Giyu's expression is priceless.
  • Shinobu appears to clarify the whole situation, and Giyu tells her not to worry since he can handle the situation... while the villagers tie him up.
  • Shinobu tells Giyu that he should put more effort into talking to people and that is the reason everyone hates him, but she is interrupted by Giyu before she can finish her sentence.
  • Giyu easily breaks the ropes used to tie him.
  • After Yae collapses due to a fever, when she wakes up, Shinobu is too close to her face, much to her embarrassment.
  • Shinobu gives Yae a medicine and when the latter girl asks what is in the medicine, Shinobu threateningly asks Yae with a smile to drink it.
  • Giyu tries to pet Yae's dog, Taro, only for the dog to bite his hand. Yae's neighbors are surprised, saying that Taro is usually friendly towards people.
  • While Shinobu explains Yae about the bear being actually a demon, Giyu comes in and says that it's his job to do the explaining... while Taro is still biting his hand. Shinobu asks him if he is aware he is being attacked and Giyu replies that he is not attacked but rather he is fooling around.
  • After the demon is defeated, Shinobu and Giyu are eating at a restaurant. When the chef brings Giyu his order of salmon radish, Giyu lights up and smiles (although the audience is not shown him smiling). Both the chef and Shinobu are shocked at the sight of Giyu smiling at the dish and Shinobu says that it is the first time she has seen him smile but asks him to eat while facing away from her.

    Kyojuro Rengoku Gaiden 
  • While Kyojuro is sparring with Mitsuri, the latter complains that she is so hungry that her tummy will reach her back. Kyojuro tells her they had lunch just a few hours ago.
  • Kyojuro tells Mitsuri she only has a thousand sword swings to do, and as an answer her stomach growls.
  • Senjuro comes in with some snacks and Mitsuri is so grateful that she hugs him while Kyojuro tells her they are not done yet with the training. He changes his mind when Senjuro adds that he included sweet potatoes.
  • Kyojuro gets embarrassed when he sees Mitsuri's Demon Slayer uniform, but when she tells him that the Kakushi who brought the uniform tells her the uniform is official, Kyojuro says that if it's official then it's fine, while Senjuro is left confused.
  • When a boy calls Kyojuro's hair weird, he replies that his family has had it for generations and that it's the way it is because his ancestors ate a lot of shrimp tempura.
  • After Mitsuri hugs Kyojuro following his battle against Lower Moon Two, Hairo, after she is told by the Kakushi to move to have Kyojuro's wounds treated, one of them is surprised at Mitsuri's strength when he tries to push her away and she is not moving.
  • A darkly comedic moment happens when Hairo mistakes Kyojuro for his father, the former Flame Hashira who nearly killed him in combat years prior, he immediately starts raving about his excitement to finally enact his vengeance — but of course, Kyojuro has no idea who he is. The demon is so confused and angry at this reaction that he shoots himself in the head to calm himself down.
  • Sanemi is annoyed when Kyojuro becomes the Flame Hashira, with Tengen smirking at him.
    • Earlier, Sanemi antagonizes and attacks Kyojuro for claiming he could take his father’s place as a Hashira, only to be dumbfounded when Kyojuro refuses to fight back and starts complimenting him instead. The other Hashira watch this unfold, with Shinobu summarizing Kyojuro as a weirdo and Tengen deciding that he likes this new guy.
  • In one panel, Kyojuro is holding back Sanemi from trying to beat Giyu up.

Light Novels

  • The fifth chapter of the second light novel focuses on a time when Ubuyashiki gave a mission to the Hashiras to make Giyu smile. Because nearly all the Hashira end up missing the real point of the mission (which was to get closer to Giyu), it goes as well as one would expect.
    Seeing this rare meeting start to unfold before her eyes, Shinobu had already reached the stage of detaching herself from the situation.
    • Mitsuri attempts to tickle attack Giyu into smiling, as it worked for her younger brothers. The attempt only leaves Giyu both scared and confused. Worse, this only ends up making Iguro angry at Giyu for making Mitsuri cry and he spends the rest of the flashback fuming at him.
    • Rengoku's attempt has him pretend to lose his glasses and have poor eyesight when they're on his head. Because Rengoku is Rengoku, the joke utterly falls through and Giyu is left further baffled while Shinobu mentally remarks the attempt was too ridiculous to work to begin with.
    • Knowing the other Hashira will be no help, Shinobu resorts to telling Sanemi to treat Giyu to salmon daikon while suggesting to Sanemi that making Giyu smile will make Kagaya happy just to be done with everything. However, this also ends up failing because Giyu just had some earlier, and Sanemi yells in frustration.

Other

     Extra Pages 
  • The author's avatar is a little green lizard with glasses that she drew to represent herself in side material. Whenever she expresses gratitude and happiness for the series, she draws her lizard avatar to be prone to tears of joy and nervously shaking.
  • A 4-koma extra has Tanjiro and Nezuko being asked by their younger siblings what kind of person they'd like.
    • Tanjiro, not wanting them to misunderstand, decides to use an animal metaphor and describes he wants a wife loyal like a shiba inu. Cue them freaking out to their mother that Tanjiro wants to marry a dog.
    • Nezuko describes her ideal man as someone like a hisha or rook. Cue a befuddled Takeo and an explanation on the qualities of a hisha piece in shogi.
    • The hilarious part? Nezuko's description of her ideal man actually refers to someone like Zenitsu, since like a hisha, he can only move vertically and horizontally with Thunder Clap Flash variants and during the Infinity Castle arc, he uses the 7th form for the first time like how a hisha piece promotes to the ryuou (or "Dragon King") piece when it enters the opponent's side
  • Chapters 125 to 133 (volume 15)'s extra chapters have really hilarious moments that have apparently happened in the background:
    • Zenitsu being excited over his tea stalks standing in his cup and saying that it will be a great day. Well, given what happens afterwards...
    • The three swordsmith villagers are doing... some kind of formation pose...
    • Genya apologizing to Ubuyashiki's daughter for pulling on her hair a while back, with her kindly forgiving him.
      The Author: "Genya punched girls before, but now that he's entered puberty, he gets nervous around them."
    • After attempting to explain the Marked State and embarrassing herself in front of all the Hashira, Shinobu is shown giving a handkerchief to a sweating and blushing Mitsuri.
    • Inosuke is nervously kneeling in front of Shinobu because he broke the window in Tanjiro's room (and their relation with each other in general is explained in chapter 159).
    • A young Giyu and Sabito are shown playing around with each other with Urokodaki watching them. The pose that both of them are doing might remind readers of a certain Fusion Dance.
    • Apparently, Yushiro was cleaning another room and suddenly freaks out and tumbles down the stairs after hearing Tamayo being disturbed by Ubuyashiki's messenger crow.
    • An injured Tanjiro comparing his brotherly fights to Genya and Sanemi's argument. An image bubble shows Tanjiro's version of a brotherly fight where he's tickle fighting his younger brother and taunting him to surrender. And given what currently happened in that chapter, it's understandable why he looks so worried.
    • During the Hashira Training, Inosuke tried to challenge Himejima to a fight. It goes as well as expected...
    • The end of the extra chapter shows a chibi Tanjiro running with a big brush and a chibi Nezuko laughing and sitting on the back of the author's lizard avatar, with the author holding a sign that says "Thank You" while crying tears of joy.
    • The final page shows Himejima cuddling a cat, with the cat freaking out internally. Apparently, he really likes cats.
  • Chapter 169's extra chapter will give readers a good laugh during Himejima's intense battle against Kokushibo.
    • Two series of panels show our main characters in the modern day.
    • The first series of panels is about our main characters playing at the beach and Zenitsu is gushing over Nezuko's swimsuit, with Tanjiro trying to calm him down as he's clearly scaring the other people there. Zenitsu ends up bleeding out because of this.
    • The second series of panels shows Tanjiro in school giving some research notes to Himejima, who's a teacher in the modern day. Tanjiro's research consists of talking about the features of a cat (and mentioning that males are left handed and females are right handed apparently), but his drawings of a cat are rather... uncanny. Himejima mistakes Tanjiro's bad drawings of a cat as a Tsuchinoko or a deep sea fish.
  • The recently released Databook (or Fanbook in Japanese) has funny images drawn by the author and revealing information for each of the characters! Here are some preview images from the Databook.
    • Most of the characters are drawn in the chibi bean faced style.
    • Nezuko, Inosuke, Zenitsu, and Tanjiro stacking on top of each other based on their heights according to a translation with Tanjiro being the tallest at the bottom. Nezuko is on top of them smiling with Blush Stickers on her cheeks. And it turns out Inosuke may actually be the shortest out of the three boys!
    • A bizarrely cute image shows Inosuke eating Zenitsu, who is eating Tanjiro, who is eating Nezuko. Apparently, this is called the "Mogumogu Panic" or "Chewing Panic"!
    • As evil as Muzan and most of his demons are, in the databook they are drawn super cute in the chibi style.
    • According to a translation in a page about Muzan and his demons, he shares his opinions on each of his Upper Ranks demons: He views Kokushibo as a business partner, he doesn't like Doma, he views Akaza as his favorite because of loyalty and seriousness, he views Hantengu as sometimes annoying but tolerable, he views Gyokko as a favorite because his pots are well crafted and can actually sell high, he likes Gyuutaro for his circumstances and greedy personality, but doesn't like Daki and says that she's not a smart child, and finally views Nakime as a favorite because her ability is useful.
      • Also, chibi Akaza is shown blowing a raspberry and chibi Kokushibo closes most of his eyes and keeps only one open.
    • Tanjiro and Shinobu smiling smugly in their data pages.
    • Tanjiro, Nezuko, Zenitsu, and Inosuke are doing cheerleading stunts with Tanjiro standing on top of Zenitsu and Inosuke, while Nezuko is lying down beneath them smiling.
    • Inosuke, Nezuko, Tanjiro, and Zenitsu doing goofy faces and singing.
    • A translation of Sanemi's page says that his hobbies are raising beetles and that in his Taishou Secret, he likes to keep his shirt open to show off his pectoral muscles, with the narrator jokingly accusing him of being perverted.
    • There are also some translations that provide information about the characters such as age, height, weight, and hobbies. Apparently, some of the characters are actually younger than they seem (Himejima being surprisingly 27, Uzui being 23 and a married man, and Rengoku actually being 20, a year behind Giyu, Iguro, and Sanemi who are all 21). And some of the characters hobbies are very appealing and unexpected (Tanjiro likes headbutting, Sanemi raising beetles as mentioned above, Uzui looking for secret hot springs, Kanao liking to blow soap bubbles, Shinobu liking ghost stories, and Iguro liking candy sculpting).
    • It turns out the author made a mistake for the Databook. On the official Twitter post, she had accidentally written about Inosuke and Muichiro being in the same hometown. She corrects this by saying that Muichiro is from a different hometown in Kageshinyama. She apologizes to the fans because of the working conditions she works in and decided to draw up a little sketch to explain things simply. The translations of these sketches here and here say that when Muichiro and Inosuke are together, they get quiet because they don't have an opinion on each other. However, if they did come from the same hometown, they would do the following: cue a picture of Muichiro acting like buddies with Inosuke out of all people. She then explains they don't act like buddies because they do not come from the same hometown. She adds a little phrase, "Zunbippa!", which is probably just an onomatopoeia she made up to apologize in the sketch.
    • Some recent translations have translated the Taisho Secrets for some of the characters:
      • Tanjiro apparently got his strong head from his mother, who is also capable of doing some really good headbutts.
      • Nezuko is revealed to have really strong finger flicks to go with Tanjiro and their mother's headbutts. She is also revealed to be really good with bouncing abacuses with high speed, so good in fact, that she accidentally broke seven of them. And in her current state of mind, she thinks Zenitsu is a weird looking dandelion.
      • Zenitsu has been playing the game that Inosuke is also playing called Kotorokotoro (a game made by Tanjiro), but gets stressed because he keeps losing.
      • Rengoku always says, "Wasshoi! Wasshoi!" while eating sweet potatoes.
      • Tengen used to live in the shadows as a shinobi, but because this lifestyle felt too plain for him, he complained about it and thus began his obsession for flamboyance!
  • As seen in the YMMV page here, the alternate continuity covers definitely have funny stuff in them.
    • The cover with the main characters swapping outfits is really hilarious. Inosuke in particular, looks like he's trying too hard to look cool in Zenitsu's outfit. And Zenitsu's hair and eyebrows are used to identify him wearing Inosuke's mask.
    • The novel's cover with the main characters side-by-side with their modern day counterparts is both funny and cute. Modern day Tanjiro has a basket of bread, confirmed to be baker in parallel to his original job as a charcoal maker and a student. Modern day Nezuko is shown in a Sailor Fuku, confirmed to also being a student along with her brother, and cuddling with original Nezuko. Original Inosuke is shown fighting modern day Inosuke with the original Inosuke holding a box of Tempura. Apparently, Inosuke is using his own weakness to fight himself. And original Zenitsu is shown smiling proudly and saluting, with modern day Zenitsu giving himself a disapproving look.
  • In the second Databook, there's a one-shot manga segment showing Goto interviewing the spirits of previously slain demons at the Sanzu River. Their reactions go from being mildly impressed by their defeats (Flower, Love, and Flame Breathing) to pure fear (Stone, Wind, Etc.) and even annoyance as well (Sound Breathing in particular). Muzan and Hantengu are shown last and Muzan is absolutely pissed by his technical defeat from Sun Breathing and Hantengu is crying like a Sore Loser. It turns out this was All Just a Dream from an injured Goto after he helped stop Muzan's escape. His friends chastise him for not watching where he was going because he apparently hit his head on rubble. All Goto can do is just stare in embarrassment.

     Kimetsu Radio 
In promotion of the show, there's Kimetsu Radio, usually hosted by Natsuki Hanae (Tanjiro) and Hiro Shimono (Zenitsu). Suffice to say, the show is unique in that it's pretty...loud.
Hanae: Your ears will hurt.
Shimono: Yes, your ears will hurt. Really, you should try to be careful.[...] What we're trying to say is that uhhh Kimetsu Radio is a bit...chaotic.
  • After Hanae recaps Episode 22 where the Hashiras want to kill Nezuko, Shimono absolutely explodes and angrily rants about how the Hashiras are wrong, how cute Nezuko is, and how Zenitsu would kick all of their asses for daring to consider hurting her. Hanae, very clearly frightened by the outburst, awkwardly reminds Shimono that Zenitsu doesn't stand a chance.
  • In the show, Hanae explained that due to being mistaken for a bot (he had jokingly described himself as such in the description due to the amount of cat videos he posts and retweets), he was blocked by the official Demon Slayer Twitter account. Four times.
  • Any time Akari Kitou (Nezuko) stops by as a guest, Shimono is bound to immediately scream "NEZUKO-CHAAAAAN!!!", making it clear that it's not just the fans who find Nezuko extremely cute.
  • Giyu's friendless Memetic Loser status eventually reaches the ears of the cast. After noting that the mail asking if Giyu had friends was rude, they end up backhandedly wondering as well:
    Shimono: Does he think Tanjiro is his friend?
    Hanae: Well, I don't really think so. Perhaps Giyu also has friends? If he has friends, I'd love to meet them.
  • The first thing that happens when Satoshi Hino (Kyojuro Rengoku's voice actor) guest-stars on the show? (Now in animatic form):
    Satoshi: WASSHOI! WASSHOI! WASSHOI! WASSHOI!
    Hanae, Shimono, Akari: WASSHOI! WASSHOI! WASSHOI! WASSHOI!
    Satoshi: HINO SATOSHI!!!
    Hanae, Shimono, Akari: YAAAAAAAAAAY!!!
  • Reina Ueda (Tsuyuri Kanao) turns out to be just as soft-spoken as her character. That said, it doesn't stop her from screaming her introduction at the top of her lungs.
    Ueda: YEAAAAH! KONICHIWAAA! VOICE ACTOR FOR TSUYURI KANAO, REINA UEDA!!!
    Shimono and Hanae (clapping): Yeeeaaahh! KANAOOO! KANAO-CHAAAAN!
    Ueda:I wanna go home already...

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