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  • Almighty Janitor: It later develops into this for the three boys regarding their role as Demon Slayers, and Nezuko as well within the demon power scale. Early in the series the boy trio are as strong as their ranks suggest, they need to take Lower Ranks within the Twelve Kizuki very seriously and an Upper Rank is well beyond their capabilities; a few training sessions and grueling battles after, the boys are just small steps behind the Hashira in terms of power despite their placement never reaching the top among the 10 field ranks for Slayers, by the Infinity Castle arc, Giyu outright states Tanjiro has reached Hashira level in terms of strength. In Nezuko’s case her raging bloodlust born out of desperation against Daki has the latter outright commenting on Nezuko’s power resembling that of an Upper Rank demon, despite the fact of Nezuko being a nobody as far as the hierarchy is concerned.
  • Balance, Speed, Strength Trio: Tanjiro, Zenitsu, and Inosuke fit each dynamic, respectively, with their Breathing techniques. Tanjiro is the Balance who wields the versatile Water Breathing and Hinokami Kagura. Zenitsu is the Speed who cuts at the blink of an eye with the Thunder Breathing's first form, and Inosuke is the Strength who uses the Beast Breathing which emphasizes wild, but strong strikes.
  • Blonde, Brunette, Redhead: The three slayers: Zenitsu is the blonde, Inosuke the brunette and Kamado the redhead. Though we can add Nezuko as the brunette sharing this with Inosuke to complete the whole group.
  • Brother–Sister Team: Tanjiro and Nezuko form one of these while they fight the demons during the earlier episodes.
  • Conveniently an Orphan: None of them have living parents or relatives: Tanjiro and Nezuko's family was slaughtered by Muzan, Inosuke's mother was slain by Doma, and not much was known about Zenitsu's parents as he spent his entire life alone mooching off other people before he met his master. This does grant them the freedom to go out and slay demons.
  • Disguised in Drag: In the Red Light District Arc, Tanjiro, Zenitsu, and Inosuke are forced to masquerade as girls in order to infiltrate a prostitute ring to investigate the disappearance of Tengen Uzui's three wives and the possibility of an Upper Rank.
  • Earn Your Happy Ending: After many tribulations fighting the Upper Ranks and the deaths of their comrades, Nezuko is turned back into a human and Muzan is finally defeated. At the end of the series, they become a surrogate family and live a carefree, happy life in the Kamado household. They each go on to marry and have children of their own, with Tanjiro getting with Kanao, Nezuko with Zenitsu, and Inosuke with Aoi.
  • Family of Choice: At the end of the series they grow to be this close, Inosuke and Zenitsu move in the Kamado household, becoming the extended family for Tanjiro and Nezuko, and eventually Zenitsu and Nezuko hit off by forming a family of their own.
  • Fire-Forged Friends: The group started on somewhat hostile terms, but after enduring trial and tribulation, they become the best of friends as of the Red-light District Arc.
  • Four-Temperament Ensemble: All-Loving Hero Tanjiro (Sanguine), Pro-Human Transhuman Nezuko (Phlegmatic), Cowardly Lion Zenitsu (Melancholic), Blood Knight Inosuke (Choleric).
  • Knight Knave And Squire: Tanjiro is the idealistic knight fighting to find a cure for demonism for his sister and the world. Inosuke is the self-trained and instinctual knave, and Zenitsu is the inexperienced squire who often doesn't want to fight.
  • Land, Sea, Sky: Tanjiro's Water Breathing and Zenitsu's Thunder Breathing are obvious fits for sea and sky, respectively. Though more subtle, Inosuke as land gets a subtle lampshade when he and Tanjiro first fight, with Tanjiro noting just how low to the ground the other boy fights.
  • Lightning/Fire Juxtaposition: Tanjiro with Hinokami Kagura and Zenitsu with Thunder Breathing, the earnest and brave with the cowardly but courageous, as the series goes both brothers-in-arms actually take inspiration from one another to grow more powerful in their battles against ever more dangerous demons: Tanjiro applies some basic knowledge of the Thunder Clap and Flash he learned from Zenitsu to finish Upper-Rank 4 Hantegu off, and Zenitsu’s own 7th Form: Honoikazuchi no Kami is actually named after a fire dragon, despite it being a Thunder Breathing technique.
  • Muscles Are Meaningful: The three boys develop a commendable amount of muscle mass as a result of intense training.
  • Punch-Clock Hero: Prior bonding with Tanjiro, both boys Zenitsu and Inosuke had no heroic aspirations for becoming demon slayers; Zenitsu just wanted to honor his master for taking care of him and Inosuke just wanted to fight demons for the sake of thrills, it is through later story developments that both of them experience personal growth and personal tragedies that turns them into very focused in killing demons for more heroic reasons: end all the suffering demons have inflicted.
  • Rags to Riches: The second Databook includes oneshot stories in which one of them show that after Muzan is defeated and the Demon Slayer Corps is disbanded, Kiriya Ubuyashiki did his last acts of goodwill as a leader - sending a box full of money to Tanjiro and Nezuko, an unspecified amount that is just said to be enough for the siblings not to worry about working a single day in their lives ever again.
  • Ragtag Bunch of Misfits: A boy traveling with his demon sister, a coward who harbors hidden determination, and a boy raised by boars. They slay demons.
  • Red Oni, Blue Oni: Inosuke and Zenitsu are the Red to Tanjiro and Nezuko's Blue.
  • Super Senses: The five survivors of the Final Selection have a characteristic super sense; Tanjiro has super smell, Zenitsu has super hearing, Inosuke has super touch, Kanao has super sight and Genya can take on the Blood Demon Arts of the demons he eats, which can constitute for taste.
  • True Companions: It took a while, but passing the same Final Selection, living under the same roof at times and facing off against two Lower Ranks and Upper Rank 6 eventually lead to the four of them reaching this status. During the Red Light District Arc, Tanjiro, Zenitsu, and Inosuke are perfectly in sync when facing off against Tengen Uzui who has abducted Aoi Kanzaki for a demon slaying mission after coming back from separate missions. Kanao and Genya are occasionally shown to be in very good terms with them during flashbacks.
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    Tanjiro Kamado 

Voiced by: Natsuki Hanae, Satomi Sato (child) (JP), Zach Aguilar, Allegra Clark (child) (EN), Ivan Bastidas (Latin American Spanish)
Live actor: Ryota Kobayashi (Stage Play)

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"To dispel the regrets of those killed, to stop any more victims from appearing, I will relentlessly wield my blade against the Demons, and that's a fact. But I will not trample on the pains of being a Demon. Nor on those who regret their own actions. Because demons were humans. Because they were humans like me."

The main protagonist of the series. Tanjiro lived in the mountains with his mother and siblings. One day, when he was thirteen years old, he came home to find that his family had been slain. Except for his younger sister, Nezuko, who was in the process of transforming into a demon. After an encounter with the demon slayer Giyu Tomioka, Tanjiro trained to become part of the Demon Slayer Corps himself and to find a way to turn Nezuko back into a human being.


  • Affectionate Nickname: Nicknamed "Mommy" by fellow Demon Slayers that endured Himejima's training alongside him during the Hashira Training Arc.
  • All-Loving Hero: Optimistic and positive, Tanjiro believes that humans and demons alike can choose to do the right thing.
  • An Arm and a Leg: He loses his left arm to Muzan. He does get it back after Muzan transforms him into a demon and keeps it after Kanao reverts him back to human. After the battle it's just hangs uselessly.
  • And I Must Scream: Tanjiro was fully aware of the atrocities that Muzan put him through as a demon, and he couldn't do anything but watch from his mind as Muzan pits his demonic corpse against his friends and loved ones. He is rather anguished once Kanao cured him of his demonification.
  • Awesomeness by Analysis: Tanjiro's smarts get him out of trouble as often as his fighting skills do.
  • Bad Liar: He's so honest that lying causes him pain, and thus his lies can be easily spotted by the weird face he makes as a consequence.
  • Badass Adorable: Cute, and one of the sweetest boys you'll ever meet. Also a skilled Demon Slayer who eventually can match a Hashira.
  • Beware the Nice Ones: Ooooh, boy. Tanjiro can be as deadly as he is nice if pissed off enough; just ask Hantengu. He and Nezuko were both known among their siblings for being very kind people that got scary when mad.
  • Big Brother Instinct: Tanjiro has made it his goal to protect Nezuko and restore her humanity, no matter what. He is also extremely protective of people that remind him of his siblings.
  • Birthmark of Destiny: Subverted. Someone assumes that the red mark on Tanjiro's forehead is a birthmark said to be connected with some sort of elemental power. But in truth, it's a burn scar he got from protecting his younger brother from a falling brazier.
  • Black Swords Are Better: Subverted in-universe. Demon Slayers' swords take their color depending on the slayer who owns them. Tanjiro's black blade seems to be an oddity, and an ill omen of sorts - no slayer with a black blade ever became a Hashira.
  • Blank White Eyes: When under great pressure, there are times Tanjiro's eyes go fully blank, such as when he goes all-out against Upper Rank Six Gyutaro and Upper Rank Three Akaza.
  • Body Horror: After getting poisoned by Muzan, Tanjiro's face starts swelling up and a massive grotesque tumor forms in his right eye.
  • Broken Tears: In chapter 126, Tanjiro breaks down in tears because he thought that he had lost Nezuko to the sun. The next chapter shows Tanjiro crying Tears of Joy and hugging Nezuko after seeing that she is alive and well. But, his tears fall once more in the later chapters when he hears of what happened to Shinobu, Genya, and Muichiro.
  • Buffy Speak: Tanjiro is a well meaning guy, and far from stupid, but he is quite terrible at explaining technical aspects of his sword and martial arts abilities. He earnestly tries to explain to his friends how to do Total Concentration Breathing training or how to achieve the Mark, but, as one translation puts it, he "extremely sucks at teaching."
  • Chick Magnet: Tanjirou at the very least has the majority of the girls in the Butterfly Manor, Aoi and Kanao especially, interested in him. Mitsuri also expresses fondness and affection towards him (much to Iguro's chagrin), although that can be explained by her friendly nature ("Love Hashira" after all).
  • The Chosen One: Played with. Tanjiro has the Mark of The Sun on his forehead, is able to use the Hinokami Kagura in moments of stress, and possesses the hanafuda earrings, but he's not a descendant of the Sun Breathing users - Muichiro is, Kokushibo's, in fact. That and the fact that the Mark is said to spread from slayer to slayer implies Tanjiro is instead part of The Chosen Many.
  • Covered with Scars: The Hashira Training arc shows Tanjiro shirtless, showing the results of recent battles: three large scars on his chest and smaller ones on both arms. The kid's been through quite a lot on his journey.
  • Country Mouse: Not emphasized that often, but he's quite the country bumpkin due to having grown up in a mountain home that was about a day's walk from the nearest village. As a result, he's completely clueless about modern developments. He's overwhelmed by Asakusa's huge crowds and modern technology when he goes there for his second mission, and his reaction to seeing a train for the first time is to assume it's a guardian spirit.
  • Crush Blush: Downplayed; while not going full red, he has displayed a slight blush when interacting with Shinobu, Mitsuri, and Kanao.
  • Curtains Match the Window: Dark red hair and dark red eyes, though it's not quite clear if the red in his hair is stylized highlights.
  • Determinator: Like most demon slayers (and most Shōnen protagonists), he will not give up. A great example of this is early on, where he tackles Urokodaki's Training from Hell every day without losing any bit of resolve. He was that determined to become a demon slayer. Not even an infected wound on his face will stop Tanjiro from using the Sun Breathing techniques to stop Muzan.
  • Distinguishing Mark: Tanjiro's earrings and the scar on his forehead are the two identifiers that demons use to find him.
  • Dull Eyes of Unhappiness: Tanjiro's eyes lose their shine when he experiences negative feelings. This is seen in moments like in chapter 135 when he hears of what happened in Himejima's past and reacts with disbelief and in chapter 181 where his eyes and face lose all emotion during his Tranquil Fury after hearing Muzan's gloating.
  • Elemental Hair: Downplayed. He doesn't have fire powers, but he has dark red hair and learns the Hinokami Kagura, originally known as the Sun Breathing.
  • Establishing Character Moment: After an In Medias Res scene showing him desperately trying to get help for Nezuko after the demon attack, his first scenes show him with his family befor he sets off on a delivery to town, showing that he's a Nice Guy and a loving son and older brother.
  • Excellent Judge of Character: Tanjiro is an expert at telling a person’s true nature not long after meeting them; two shining examples are his encounters with Shinobu and Zenitsu: with the former Tanjiro is able to tell Shinobu harbors some deep anger under her constant pleasing smile, with the latter Tanjiro is able to tell Zenitsu is actually a very strong demon slayer right away, despite Zenitsu repeating innumerous times in their first encounter that he is weak, it reaches the comical irony in which Tanjiro is actually surprised to see, in the Red Light Disctrict arc, that Zenitsu has to rely on his trance sleep mode to unleash his full strength, while other people, like Inosuke, had to see Zenitsu during that state to see that he was strong after all.
  • Expository Hairstyle Change: Initially, his hair was long enough to tie it in a high ponytail. Then, when he faces Giyu following the slaughter of his family and Nezuko's transformation into a demon, the ponytail is cut off, leaving him with a messy mop. During his training with Urokodaki, his hair grows out to shoulder-length, only to cut it short after completing his training in two years. The haircuts signify the changes that happened in his life and his ascension as a Demon Slayer.
  • Every Scar Has a Story: Tanjiro has aquired quite a few of them over the series, all with a story to tell, from a clear demonstration of his role as a protector for his family – the one on his forehead, to all the hurdles he went through fighting demons – arms, chest, jaw.
  • Eye Scream: Tanjiro gets his right eye cut by Muzan after trying to fight him. Getting his eye cut gives Tanjiro a disadvantage. But, it gets worse once Muzan reveals that he poisoned Tanjiro with his demon blood and a tumor starts forming in his eye. After Muzan turns Tanjiro into a demon, his right eye is fully restored but after recovering from the battle he can no longer see out of it.
  • Face–Monster Turn: After Muzan's death, the resulting Heroic RRoD from being infected with Muzan's blood kills him. Only to be turned into a bloodthirsty Demon as Muzan's last act was transferring the last of his blood into Tanjiro.
  • Family Business: Despite the Kamado family being one of charcoal burners and sellers, Tanjiro states his ancestry is well documented. There are centuries of family members properly registered in their records. That's how he's able to tell he's not a descendant of the Sun Breathing users, but only knowing its teachings thanks by Yoriichi teaching Sumiyoshi and the latter managed to get it correctly enough to pass it down to his descendants.
  • Fingore: Gyutaro snaps two of his fingers while attempting to demoralize him during their fight. Tanjiro being Tanjiro, it naturally doesn't work.
  • Freudian Excuse Is No Excuse: While Tanjiro is able to sympatize with demons through the understanding that they were once humans who had their lives go terribly wrong, he still condemns any who kill innocent humans and does not hesitate to cut them down.
  • Friend to All Children: Tanjiro is shown to be very good with kids, being the eldest child of a large family. Funnily enough, that extends even to the childish antics of people his age. When Inosuke is trying his hardest to piss him off not long after they meet, Tanjiro can calmly brush off his deliberately annoying behavior. He was probably already immune to it after years of exposure with his siblings.
  • Good Is Not Soft: Very much so. Just because Tanjiro is the sweetest person around doesn't mean he won't chop a demon's head off. Or as Genya can attest to, our hero won't hesitate to break a bully's arm either. Or as Zenitsu can attest to, our hero will even give a scolding to perverts since he first mistook Zenitsu for one during their first meeting. Or, as Genya's brother Sanemi can attest to, our hero will never let family members hurt family members and willingly fought Genya's brother to protect him. Or as Rengoku's father, Shinjurou can attest to, our hero lunges himself to attack him for badmouthing his late older son and abusing his living younger one for mourning his death, being a former Hashira doesn't matter to him, if he keeps abusing his sons.
  • Hard Head: He has a very thick skull and frequently headbutts people as a Running Gag throughout the series. The Databook reveals that he got this trait from his mother, who can also use some pretty effective headbutts herself.
  • The Heart: Undisputable in this regard for the entire series, Tanjiro is such a lovable protagonist that he's able to win most Hashira by his personality alone. He builds an extensive record of characters that changed for the better simply by coming in contact with him. And while Tanjiro always kills the demons in his path, he never fails to feel pity for them in their final moments. That is if they don't completely piss him off. He holds no sympathy for the unredeemable ones who excel and delight themselves in being evil bastards.
  • Heroic Resolve: Despite being shown the vast difference in strength between himself and Gyutaro, Tanjiro still attempted to take his head.
    Tanjiro: I.. I... Was preparing (headbutt)
  • Honor Before Reason:
    • He's insistent on providing due payment for services even if the person helping him offers to do it free of charge.
    • Also shows up in the drum demon fight, where he calls out the demon in question despite having a perfect ambush opportunity.
  • Identical Grandson: Tanjiro's ancestor from Yoriichi's time, Sumiyoshi, looks a lot like him. Tanjuro, his father, would be an older Tanjiro if not for his ill, underweight appearance.
  • It's Personal: Tanjiro has a very, very personal beef with Muzan, blaming him for Nezuko's transformation and for slaughtering his family. He also despises Upper Rank Three Akaza due to Akaza killing his friend and Big Brother Mentor Rengoku Kyojuro.
  • Jack-of-All-Stats: Tanjiro first starts his training in swordsmanship with the Water Breathing style, which is the best style for beginning swordsmen because of its fluidity, flexibility, and balance. As a result, Tanjiro can adapt to any situation in battle and come up with strategies to win with his Water Breathing style. And because of the Water Breathing style's flexibility, Tanjiro can adapt the Water Breathing style techniques into his Hinokami Kagura style, which makes his techniques faster and even stronger.
  • Kid Hero: Tanjiro is a young teenager, currently 15 years old, and a very skilled demon slayer.
  • Made of Iron: Demonstrated quite beautifully in his Good Old Fisticuffs duel with Inousuke. Tanjiro ends the fight by headbutting Inousuke so far that he passes out from a concussion. To the shock of everyone watching, Tanjiro has no bruises of his own on his forehead. And this ignores his ability to fight through broken bones.
  • Magnetic Hero: Thanks to his personality, he earned friendship and trust from several people who were once indifferent to hostile towards him. Case in point, before he's sent to train with Iguro and Sanemi, most Hashira not only pass him with flying colors but receive with the genuine joy of someone greeting a friend.
  • Making a Splash: Tanjiro begins his training with the Water Breathing style.
  • Massive Numbered Siblings: Tanjiro was the eldest child among six siblings. After Muzan killed his mother and four of his younger siblings, his only surviving sibling is his younger sister Nezuko.
  • Master Swordsman: Tanjiro masters two breathing styles: Water Breathing and the Hinokami Kagura i.e Sun Breathing and takes in aspects of techniques from other breathing styles such as Lightning, Stone, and Serpent. Giyu observes in their fight against Upper Rank 3 Akaza that Tanjiro's current level of skill is akin to the Hashira.
  • Meaningful Name: The first kanji in his given name (炭) means "charcoal". This alludes to how he comes from a long line of charcoal sellers.
  • Morality Chain: While Nezuko does have an astonishing amount of self-control, it's not perfect, and they're aware of this. When she starts to slip, Tanjiro is there to help her stay on the right path. Now that Nezuko is again able to talk and resist sunlight, Tanjiro can focus more on his training.
  • Nice Guy: Incredibly so — Tanjiro is characterized through his kindness and loyalty. He has an endless reserve of compassion for all but the vilest of people. And if asked for help, regardless of the task, he will work his hardest to see it through.
  • Nosebleed: His second encounter with Love Hashira Kanroji Mitsuri in the Swordsmith Village ends with Tanjiro getting one, to Nezuko's shock. Even better, it apparently wasn't because of Mitsuri's Boobs of Steel, but because she mentioned a weapon that could make him stronger.
  • The Nose Knows: His sense of smell is incredibly keen. He's able to estimate a demon's strength by scent alone.
  • OOC Is Serious Business: When Tanjiro faces Muzan the second time. Muzan espouses his belief that fighting him is as futile as fighting a disaster, in a way equating himself to a god. This sends Tanjiro into a Tranquil Fury mode, saying that Muzan's existence can no longer be tolerated. Notably, his eyes turn dull and cold, in contrast to his usual emotions.
  • Orphan's Plot Trinket: Tanjiro's hanafuda earrings belonged to his father.
  • Playing with Fire: During an intense battle, Tanjiro starts using the Hinokami Kagura as his style to better effect. After Nezuko uses her demon blood technique on his sword, it is a legitimate flaming sword. And his new style is very effective in his fight against Akaza.
  • Post-Climax Confrontation: When Muzan dies, he forces his blood on Tanjiro to turn him into a demon who can actually become immortal. Tanjiro acts as the true final enemy of the story after Muzan's defeat, but his battle is not nearly as climatic, complex or long.
  • Prone to Tears: Tanjiro is a very emotional and sensitive person who has a great sense of understanding other people. So as a result, he's shown to cry depending on the situations like in chapter 135 where Tanjiro cries Tears of Joy when Himejima tells him of his past and how he will continue to support Tanjiro after seeing his honesty.
  • Rage Breaking Point:
    • When the combined aspect of Hantengu implied that humans were the evil ones, Tanjiro, having smelled the sheer volume of blood from the humans he had killed, called the aspect evil in turn and immediately proclaimed his intent to behead him. He upholds that promise by slaying Hantengu himself. Said demon is one of the few for whom even Tanjiro has no kind words.
    • Seeing Muzan (the person responsible for killing his family and turning Nezuko) also brought his anger to the forefront.
      Tanjiro: ''I will pursue you to the ends of hell itself!! I will remove that head of yours with my blade!! I will absolutely never forgive you!!
  • "The Reason You Suck" Speech:
    • Tanjiro gives a brief one to Sanemi after Sanemi stabs Nezuko, saying that if Sanemi can't tell the good demons from the bad ones, he doesn't deserve to be a Hashira.
    • Tanjiro gives a mourning and angry speech against Akaza (and demons in general) after the demon left Kyojuro irreparably close to death. Because the sun was rising, Akaza felt the need to run for his safety, which greatly upset Tanjiro, as Kyojuro actually fought hard enough during the night to make the fight last until sunrise, while protecting a group of 200 people - Tanjiro included.
  • Romantic Wingman: Despite Zenitsu growing up to be a commendable slayer by the end of the series, he still retained some of his classic flaws, like being quick to feel jealousy over Nezuko when Giyu and Sanemi act nice towards her, to being awkwardly loud when trying to court Nezuko; with that Tanjiro takes upon himself to teach Zenitsu how to behave in order to be the best man Nezuko could have; as shown in the oneshot story within the second Databook.
  • Scars Are Forever: As a child, he got a burn mark on his head from protecting his brother from a falling brazier. During the Final Selection, the healed skin gets ripped off by a demon's attack. Oddly, it never properly heals, remaining red even a year or so later, even though it doesn't bleed or anything.
    • Subverted with his left arm and right eye, which he lost during the battle against Muzan. Several Demon Slayers that didn't lose their lives lost a body part or two during the final battles. However, Tanjiro quickly regenerates his arm and eye after being transformed into a demon by Muzan. As though his body didn't fully assimilate the regeneration, he sadly lost full function of both after becoming a human again. Case in point, his left arm is now sickly and shriveled, which can be lifted by the shoulder, but has no feeling below the elbow and is completely blind in his right eye.
  • Shut Up, Hannibal!: His final confrontation against Muzan is this in the Battle At The Center Of The Mind. Muzan attempts to hold his grasp on Tanjiro by telling Blatant Lies on how he killed his sister and friends, how he can never be forgiven for what he did, how he'll only live a few years after unlocking his demon slayer mark and could live forever, and that the dead are bitter he survived. Tanjiro shuts down every one claim after another with optimism and selflessness. This leads Muzan into a much deserved Villainous Breakdown.
  • Single Woman Seeks Good Man: All of the girls that are romantically interested in him tend to focus on his virtuous traits and kind personality.
  • Speaks Fluent Animal: Tanjiro is surprisingly able to communicate with Zenitsu's messenger sparrow. The Databook reveals that he can do this by smelling the scent of the animal, indicating what the animal is feeling.
  • So Last Season: For a good part set in the middle of the series it seemed Tanjiro would have to often rely on mixing other Breathing Styles in conjunction with his Hinokami Kagura since the latter was just taxing on his body; come the Infinity Castle arc and Tanjiro masters the Hinokami Kagura without ever needing other styles again, and after that Tanjiro grows to greater heights once he masters Hinokami Kagura into its original Sun Breathing form.
  • Spin Attack: Several of the Water Breathing techniques involve this, including Water Wheel (an overhead spin attack), Twisting Whirlpool (a more traditional spin attack), and the Dragon of Change (a continuous version of this).
  • Strong Family Resemblance: Looks like a younger version of his late father. Of his siblings, Takeo and Rokuta look the most similar to him.
  • Survivor's Guilt: Even though if he had been there, he definitely would have died or worse been turned into a demon along with Nezuko, Tanjiro still harbors a lot of guilt that he wasn't home when his family died. He also feels this about Rengoku's death, thinking it would have been overall better if he had died instead.
  • Super Mode: Whenever the Mark of The Sun appears on his forehead, Tanjiro's strength, speed, and reflexes increase. Allowing him to fight enemies he would otherwise have no chance against. And he can enter a state that allows him to see through things in a 'Transparent World', taught to him by his father in the past. This 'Transparent World' state helps him view the body structure of his opponents and conceal his fighting spirit. This gave him the advantage against Akaza, who could not sense his presence and therefore couldn't predict Tanjiro's movements. However, after using this state for a certain period, his body will start to feel the exhaustion from the overall usage of this state. It's hinted in the Red Light District arc that Tanjiro's Super Mode may pave the way for him to one day reach Tsugikuni Yoriichi's level of strength.
  • Superior Successor: Yushiro explains after Tanjiro is cured that, considering how quickly he conquered the weakness to the Sun (overcoming it in an instant and much faster even than Nezuko did) and how much Demon blood from Muzan he received and lived when he had just turned, Tanjiro's potential as Demon is even greater than Muzan.
  • Supreme Chef: During the Hashira Training arc, Tanjiro is revealed to be an excellent cook. Tanjiro smugly (and adorably) explains that cooking food is easy for him as the son of a coal burner since it's very similar to heat checking.
  • Sympathy for the Devil: How he feels towards tragic demons. Despite not knowing their backstory, he's able to smell their suffering, often trying to give them at least some sort of consolation as they die. Notably, he doesn't inflict needless suffering on those that surrender - the Spider Mother of the Natagumo Mountain arc, for instance, was granted a completely painless death.
  • Tears of Blood: When fighting the demon Daki.
  • Tender Tears: Tanjiro is very kind-hearted and often cannot help but cry for the more sympathetic demons when they die.
  • Throwing Your Sword Always Works: Downplayed. He doesn't do it often, and the ones he threw those swords at were demons with absurdly powerful healing factors, but more often than not they were accurate enough to where they either did or would have hit them were it not for their abilities.
  • Took a Level in Badass: He starts out as a weak boy who could only kneel before Giyu and beg for his sister's life. He eventually becomes a formidable Demon Slayer who can hold his own and contend with Upper Ranks. Giyu notes the contrast during the fight against Upper Rank Three Akaza, saying that Tanjiro's strength is currently that of a Hashira. Tanjiro gets even better when he learns from his memories as Sumiyoshi on how to use the Sun Breathing style against Muzan. Tanjiro's potential then peaked after Muzan turned him into a demon.
  • Tragic Keepsake:
    • Tanjiro's fourth and current sword has Rengoku's sword hilt attached to it in his honor.
    • The earrings he wore were originally belong to his father, and he continues to wear them as a memory of him.
  • Training from Hell: Several times. He was under Urokodaki's guidance for around two years and went to even worse training under Himejima's care. Some of his most intense training ends up coming from a ten-year-old who doesn't let him eat, drink, or sleep for a week.
  • Use Your Head: Tanjiro's head-butts are impressive. It's even confirmed to be one of his favorite hobbies, according to the Databook.
  • We Help the Helpless: When Akaza starts gloating about how he hates the weak and that he perceives the law of nature in The Social Darwinist way, Tanjiro counters his argument by saying that those with strength should help the weak instead. Tanjiro's words are quoted right here:
    Tanjiro: "The strong should aid and protect the weak. Then the weak will become strong, and in turn, they will aid and protect those weaker than them. That is the law of nature."
  • What Measure Is a Non-Human?: An interesting case. Tanjiro is determined to kill the evilest demons even if they lose their fighting spirit, or are trying to flee for their lives. But he is also completely willing to see demons as humans and will fight to protect them if they are really remorseful and will not attack innocent people. He also tends to have a lot of Sympathy for the Devil as soon as the fight is over.
  • Who Wants to Live Forever?: When Muzan is trying to get Tanjiro to inherit his visions in their Battle in the Center of the Mind, he tries to tempt him with eternal life. Tanjiro however, declines saying that he'd rather die as a human than live forever alone as a demon.
  • With Catlike Tread: During the fight with Akaza, he screams that he's about to kill him when attacking him from behind, despite the fact that Akaza is no longer able to sense his aura and thinks he has killed Tanjiro. Giyu notes how foolish it is to reveal himself like that.
  • Wrecked Weapon: Happens to him a lot, which, suffice to say, did not endear him to Haganezuka. Most of the time, he's not entirely to blame, though he lost his second sword after throwing it at a retreating Akaza.
  • You Killed My Father: The death of most of his family, along with Nezuko being turned into a demon, is what drives him to become a Demon Slayer and kill the demon responsible for it.
  • You Remind Me of X:
    • His kindness and viewpoint of the world reminds Shinobu of her late sister Kanae, reaffirming that maybe there are good demons out there who needed salvation, which is why she and Giyu are the only Hashira who sympathized with his unique situation as opposed of their fellow colleagues' apathy to blatant disapproval. Also, they also remind Muichiro of his deceased father, who also used to say helping others is beneficial for one in turn. The words lead to Muichiro regaining his memories and unlocking the strength to defeat Gyokko.
    • He reminds Akaza of his beloved mentor Keizou, whose death by poisoning with his daughter triggered his Start of Darkness. Akaza notes this was probably the one reason he didn't like Tanjiro: reminding him of the past he wanted to forget.

    Nezuko Kamado 

Voiced by: Akari Kitou (JP), Abby Trott (EN), Annie Rojas (Latin American Spanish)
Live actor: Akari Takaishi (Stage Play)

https://static.tvtropes.org/pmwiki/pub/images/nezuko_kamado_anime.png
Click here to her face without the muzzle 
Click here to see her full demon form (Spoilers

Tanjiro's little sister and the only surviving member of his family after they were attacked and killed by a demon. She became a demon herself, and as a result, can no longer speak and has almost no memories of her life as a human. Since she refuses to eat humans, she gets her energy from spending most of her time asleep. Tanjiro carries her in a box on his back.


  • 11th-Hour Superpower: Nezuko gained her Blood Art during the Spider Mountain event, in the more hectic moments of the fight against Rui. At that point it was shown that Nezuko's blood could ignite into special flames that could do serious damage only against demons, and it can even diminish their healing and blood art powers. Her power set remained as such for two arcs; then came the Red Light District battle, and at the end it was shown Nezuko can also expunge any demonic injuries caused by their abilities on humans, so Nezuko can actually heal people, even mortal wounds, if their injuries were inflicted by a demon's abilities. It all came in a critical moment where Inosuke and Uzui could actually have died if Nezuko didn't reveal this ability.
  • Adaptation Expansion: After becoming a demon, Nezuko loses her ability to speak. The anime adaptation makes a few original moments portraying Nezuko's inner thoughts on her seeing humans as her family to protect, and how she cares for her brother in the series' early events, as the manga only has Nezuko speaking as a demon for the first time just to spell her Blood Demon Art and after that during the dream world Enmu casts in the Infinity Train arc. At the end of the Swordsmith Village arc Nezuko conquers the Sun and learns how to speak basic sentences again.
  • Action Girl: Nezuko is quite action-oriented, and thanks to her training and strength, she can kick a lot of ass.
  • All-Loving Hero: Much like her brother, Nezuko has a bottomless well of compassion that didn't change after turning into a demon. Best shown when she protected Tamayo and Yushiro, as demons the two don't fall under her compulsion, meaning she did it of her own volition.
  • Amnesiac Hero: After her demon transformation, she has lost her memories of her life as a human, so her mentality has reduced to that of a child.
  • Badass Adorable: Nezuko is the cutest little thing in the manga. She is also incredibly powerful, and her potential exceeds Upper Ranks. She even manages to gain the ability to be in direct sunlight without disintegrating, something even Muzan is unable to do.
  • Barbarian Longhair: As part of her Expository Hairstyle Change, Nezuko's hair is let down and loose to signify her transformation into a Demon.
  • Bedtime Brainwashing: In a rare positive example, Urokodaki repeatedly told her to protect and care for humans during the two years that she slept through while Tanjiro was training, to strengthen her already unusual resistance to eating humans. Tanjiro wasn't very happy about this as he felt it was like brainwashing, but felt better after Nezuko proved she alone would decide who to protect.
  • Berserk Button: Muzan's influence. She still subconsciously remembers the day her family was slaughtered by him, so when Daki (an Upper Rank with a high concentration of his blood) slices through the pleasure district that causes some civilian causalities, it causes her to snap and go on a rampage against her.
  • The Berserker: As she becomes angrier, she loses control of herself, but at the same time can become as powerful as Upper Ranks demons. A flashback shows that losing control of herself when angry is not a new "demon influenced" part of her personality but was something she always had, and her younger brother was genuinely concerned for her about it.
  • Big Brother Instinct: Her last conscious action as a human was to shield her youngest brother from Muzan's attack. In her current state, she often sees flashes of her younger siblings when deciding to protect people.
    • She also inverts this with her older brother Tanjiro, as she is shown resisting her demonic urges in order to defend him.
  • Big Damn Heroes: Saves Tanjiro's life a few times, such as when Giyu attacked them, which prompted him to stop since no one had ever seen a demon protecting a human. She also helps defend Tanjiro in combat against some sneak attacks that would've otherwise killed him had it connected.
  • Brainwashing for the Greater Good: Downplayed, in that she was already good, but had a hypnotic suggestion implanted to tame her instincts. Urokodaki tells Tanjiro that he used subliminal messaging on her while she was sleeping when he was training for the Final Selection test. He suggested to her that all humans were her family and that all demons were bad and must be stopped. It works, and from time to time, she imagines seeing other characters as members of her slain family, such as seeing Tamayo and Yushiro as her mother and younger brother, which helps her to fight harder against any demons attacking them. Tanjiro's initially unhappy with it, but eventually decides that it's for the best.
  • Broken Tears: As Nezuko becomes human in chapter 196, all she can do is cry as she regains her memories.
  • The Chosen One: Played with. Like her brother, Nezuko is vaguely related to the Sun Breathing users through an ancestor who was good friends with them, though because she's a demon, whether or not she is able to access it is unknown. Though Nezuko does show herself to be a powerful demon with enough willpower to resist eating and even protecting humans from other demons, making her special for a demon. Even more so after she is able to survive out in sunlight.
  • Commuting on a Bus: Its also not uncommon to have multiple episodes of nonstop fighting happening, without her ever appearing. Keep in mind, in a lot of these cases; she's in Tanjiro's backpack the whole time. After the swordsmith village incident and gaining resistance to the sun as well as being able to talk again, she was mostly absent during the Hashira Training Arc and only appeared a few times at the Butterfly Estate because of how she's become a target for Muzan. Even Tanjiro, who was training during this arc, thought to himself about how lonely Nezuko must have been being temporarily under someone else's care. She's also totally absent from the final battle, only appearing at the very end when she's back to human.
  • Compressed Hair: As a human, she wore her hair in a tight bun at the back. When she lets it down upon her demonic transformation, it reaches her thighs.
  • Cool Big Sis: As the second oldest child next to Tanjiro, she was this to her younger siblings.
  • Cry Cute: Played for Laughs. During the Infinity Train Arc, she tried to wake Tanjiro up by headbutting him. Which made her head - at this point a super-strong and super-durable Demon - bleed. She cried in pain, but it's cute nonetheless.
  • Cute Bruiser: Small, adorable, and unbelievably powerful.
  • Cute Monster Girl: She's a Cute Bruiser demon.
  • Deuteragonist: She shares the spotlight with Tanjiro as one of the main protagonists, and a good chunk of the story revolves around Tanjiro searching to cure Nezuko's demonic transformation, while also regaining her memories of her previous life as a human.
  • Dual Age Modes: Though not really commented on in-universe, Nezuko's physical age changes depending on how much she gives into her demonic nature, with her body maturing to that of a young woman when in her full demon form. This is first shown at the very start of the series when her body began growing as she tried to devour Tanjiro, before regaining her senses and maintaining her familiar young appearance. She is also capable of transforming into an infant-like state, as seen during the beginning of the Swordsmith Village arc.
  • Dumb Muscle: Downplayed. She's not precisely stupid, but turning into a demon erased much of her human memories. Thus she often comes off as childlike and naive, while also having a demon's extraordinary physical strength.
  • Expository Hairstyle Change: As a human, she had her hair tied back into a neat bun. After turning into a demon, her hair is let down and she wears it loose from that point on, with the tips changing to a fiery orange color.
  • Extraordinarily Empowered Girl: Despite not eating humans, Nezuko is very powerful for a young demon, to gain her level of power a demon would need to be very old and have eaten a lot of people.
  • Fanservice Pack: The first time Nezuko uses her size-shifting powers, it just makes her literally bigger in all aspects proportionally — her body doesn't actually mature. This changes during her fight with Daki, as she spontainiously grows into a full-grown, very curvy young woman as she embraces more of her demon side. Coincidentally, her kimono had been messed up from the fight earlier, leaving plenty of gaps to show off her brand new curves and assets.
  • Good Thing You Can Heal: When Nezuko fights it tends to be a straightforward Attack! Attack! Attack! style, which for most people is pretty easy to deal with, except the longer she fights, the stronger she becomes, and her regeneration becomes so good it doesn't matter if her limbs are cut — she'll just regrow new ones in less then a second.
  • Heroic Willpower: Resists the temptation of eating human flesh, against all odds. When she does attack her brother when she first becomes a demon, his words to her cause her to pause and cry, and she later attempts to protect Tanjiro from Tomiaka. This action is what convinces Tomiaka to believe Nezuko is different from other demons, since a newly transformed demon is typically starving and would devour their family members without a second thought. A little later Sanemi attempts to prove she's just another demon by enticing her with his blood after stabbing her several times. Nezuko turns away, shocking him and all Yashira present. This moment becomes all the more impressive with the reveal that Sanemi is a marechi, whose blood is like a drug for demons.
  • Horned Humanoid: Nezuko grows a single horn on the right side of her head when she transforms into her full demon form.
  • Hunter of His Own Kind: While not an official member of the Demon Slayer Corps, she ends up doing plenty of demon-fighting with Tanjiro because being a demon is useful when fighting other demons.
  • "I Know You're in There Somewhere" Fight: When she first starts succumbing to becoming a demon, Tanjiro is reluctant to attack her. He attempts to reason with her, and it seems to work, as she slowly stops struggling against him. She later tries to protect him from Giyu, an act that's never been observed in any demons before.
  • The Ingenue: After becoming a demon, her personality regresses to that of a small child and she loses the ability to speak. Even after regaining it, she can really only repeat what others say. Outside of her family, it doesn't seem she remembers much of her human life. Tamayo suspects this was because she was focusing her energy on overcoming the sun.
  • Kick Chick: Nezuko's fighting style? Kicks strong enough to behead demons. It should be noted here that this isn't nearly as graceful as most examples of this trope - she just smacks people in the head with big, heavy boots. In the anime adaptation, this is further emphasized with loud thuds and her demonic opponents struggling to keep their guards from collapsing under the force.
  • Little Miss Badass: Though she's a young girl, Nezuko can fight against other demons for protect humans as she's a demon herself.
  • MacGuffin Super Person: Because Nezuko has gained resistance to the sun, something that Muzan's demons cannot do, she now has a target on her back because Muzan found out and now plans to absorb Nezuko so that he can withstand the sun and become truly immortal. As a result, the Demon Slayers hid Nezuko in another location and she is currently under Urokodaki's care. They are also trying to foil Muzan's plan by using Tamayo's medicine to turn Nezuko back into a human so that Muzan cannot obtain the resistance because only a demon with sun resistance can make another demon gain that resistance. And when Nezuko becomes human, Muzan will not be able to fulfill his plans.
  • Made of Iron: Nezuko manages to hold onto her brother after he bites her left shoulder, endures the massive shock waves, and stops Tanjiro's Demon Blood Art at the cost of losing most of her fingernails and injuring her left hand.
  • Magic Skirt: Or kimono, as it were. Be it high kicks, jumping vast distances, or hanging upside down, no force is capable of making her kimono reveal more than midway up her thighs at most, even if it's been visibly ruffled. Which is odd considering it's simultaneously loose enough to show that She's Got Legs. This is subverted in a few instances when she turns into her full demon form and grows too big for her kimono. Her underwear is briefly visible as Tanjiro is struggling to restrain her during the Red Light District Arc, and her butt is almost fully shown in one panel during the Hantengu fight after she rescues Tanjiro and tumbles to the ground.
  • Massive Numbered Siblings: Tanjiro was the eldest daughter among six siblings. After Muzan killed her mother and four of her younger siblings, her only surviving sibling is her older brother Tanjiro.
  • Minored In Ass Kicking: Inside a box at day (being sun allergic as other demons) , fight off demons at night.
  • Multicolored Hair: She has black hair with reddish-orange ends.
  • My Blood Runs Hot: Once spilled, her blood can ignite and burn demons. Notably, it only will burn demons, so she can safely use it on humans to burn away demon influence.
  • Nice Girl: Even if she's been turned into a demon, she still carries the compassion and love that she had as a human. And after gaining resistance to the sun and starting to speak again, she's closer to becoming the kind young girl that she was before.
  • No-Holds-Barred Beatdown: Due to her nature as an untrained and inexperienced fighter, Nezuko unfortunately gets subjected to vicious beatings from the more powerful demons within the Upper Ranks that she battles, most notably against Daki and Hantengu. She is able to return the favor to Daki, but she gets hopelessy outmatched by Hantengu's emotions and ends up pinned to the floor by a staff through her neck with a constant stream of electricity cooking her. Good Thing She Can Heal, indeed.
  • One Hero, Hold the Weaksauce: She eventually develops resistance towards sunlight, allowing her to walk under the daylight once more. This makes her Muzan's top priority target, as throughout his thousand-years existence, this is the first time a demon can survive the sunlight, and he wants to make that immunity his.
  • Pink Means Feminine: Nezuko wears a light pink kimono, and as a human she was a kind, caring girl and devoted older sister, traits she retains even after becoming a demon.
  • Power Limiter: Things get serious when she bites through her muzzle.
  • Pro-Human Transhuman: Nezuko will fight other demons to protect humans.
  • Pull Yourself Down the Spear: During the battle with various emotions of Upper Rank 4 Hantengu, Nezuko is impaled on Sorrow's polearm while she is focused on fighting Anger. She immediately pulls herself down the weapon towards Sorrow and wraps him in a bear hug, using the blood from her wound to ignite Sorrow with her Blood Demon Art.
  • Pulling Themselves Together: Nezuko's Healing Factor is taken Up to Eleven during her fight with Daki as she slowly gives in to her demonic nature. After Nezuko's body matures to that of a young adult, Daki finds an opening to attack and cuts Nezuko into pieces with her sashes, sending her head flying. However, before her body parts can even hit the ground, the blood pouring from her severed pieces coagulates into solid streams that literally pull her back together and heal instantly. This completely turns the fight as none of Daki's attacks can affect her after this point.
  • Rapunzel Hair: Has long dark hair reaching past her waist.
  • Raven Hair, Ivory Skin: She has black hair and pale skin. According to Tanjiro, she was a renowned beauty in their hometown as a human.
  • Relative Button: Seeing Tanjiro in danger or in a battered state is usually the moment she fights back other demons.
  • Shared Family Quirks: Nezuko is shown to give head pats to people at times like how Tanjiro does with her and her other siblings.
  • She's Got Legs: Although standing straight doesn't show anything, her kimono is loose enough that if she takes almost any other position, she shows off her bare pale legs. This is emphasized much more in the anime adaptation. This is taken to Ms. Fanservice territory when in her full demon form, due to her body maturing into an older appearance and growing too big for her kimono, fully displaying her now long and shapely legs.
  • Ship Tease: In a 4-Koma extra chapter, Nezuko, when she was still human, is asked by her younger brother, Takeo, what kind of man is her type, Nezuko answers she would like a man who's like a “Hisha”, a piece from Shogi, the Flying Chariot which like the Rook from Chess can only move vertically and horizontally, and the “Hisha” becomes “Ryuou” (Dragon King) once the piece is promoted upon entering the opponent's territory; exactly like all of Zenitsu's Thunder Clap Flash variations and the 7th form Honoikazuchi Nokami being first used when Zenitsu entered the Infinity Castle, the opponent's territory.
  • Sizeshifter: After becoming a demon, Nezuko becomes able to shrink herself down to the size of a small child. She mostly uses this to make it easier for Tanjiro to carry her around, but it can also be used to evade attacks.
  • Slasher Smile: During her fight with Daki, after destroying her muzzle, we are shown that Nezuko is wearing a psychotic grin as she beats on the other demon.
  • The Speechless: She's no longer able to speak after becoming a demon, though she can still vocalize and makes her intentions clear with her actions. After she gains the ability to survive in the sun, she slowly regains her ability to speak coherent words.
  • Strong Family Resemblance: She looks like a younger version of her mother. Of her siblings, Hanako and Shigeru look the most similar to her.
  • Super-Powered Evil Side: When Nezuko taps into her demon powers, she gains incredible power and transforms into an older form, but the more she takes, the less control she has. She seems to have more control of her full demon form by the time of the Swordsmith Village arc, where she maintains the form in battle against Upper Rank 4 without suffering from the drawbacks that she did in the previous arc.
  • Tainted Veins: Develops these when she looks particularly demonic, along with Hellish Pupils.
  • Trademark Favorite Food: In the High School A.U., her love of bread is so great that she always has a big loaf in her mouth.
  • Turning Back Human: Tanjiro's goal is to restore Nezuko's humanity to save her. With the help of Tamayo's medicine, his goal succeeds as Nezuko finally regains her humanity in chapter 196. However, it is unknown if Nezuko is Brought Down to Normal when becoming human again.
  • Unskilled, but Strong: She doesn't have her brother's advanced combat training—she's just powerful and swift, and when she plants her boot in your face, you soon find yourself without a face.
  • Vegetarian Vampire: While she is a demon rather than a vampire, her strict abstinence from preying on humans fits the idea of this trope. Rather than eating humans, she's usually sleeping.
  • When She Smiles: After gaining resistance to the sun and being able to talk again, she no longer needs the muzzle anymore, and Nezuko is shown to be the happiest girl ever and smiles very often. Even the narrator describes her smile as, "A smile that shines like the light of dawn..."
  • Women Prefer Strong Men: After becoming human again, Nezuko meets Sanemi in the hallways and the two briefly converse. When he leaves, Nezuko becomes flustered and her heart starts racing as she watches Sanemi go, which makes Zenitsu jealous.
  • Yamato Nadeshiko: Before becoming a demon, Nezuko was ladylike, motherly, a renowned beauty with Raven Hair, Ivory Skin, and enjoyed traditionally feminine activities like sewing. She also cared greatly for her family, as her last conscious act as a human was to try to protect her younger brother. After becoming a demon, she becomes more childlike and acts more on instinct (which is further amplified by her ability to shrink her size), though she still proves to have a strong resolve when it comes to her refusal to harm humans.

    Zenitsu Agatsuma 

Voiced by: Hiro Shimono (JP), Aleks Le (EN), Jose Luis Piedra (Latin American Spanish)
Live actor: Keisuke Ueda (Stage Play)

https://static.tvtropes.org/pmwiki/pub/images/zenitsu_agatsuma_anime.png
'I've... been protecting it... because you... said that... this thing is more important to you... than your own life..."

Another young member of the Demon Slayer Corps who meets and travels with Tanjiro and Nezuko. Despite being cowardly and insecure, he still tries his best when push comes to shove. He fights better in his sleep than awake.


  • Accidental Misnaming: This happens to him after Nezuko starts talking again.
    Nezuko: (to Zenitsu) "Welcome back, Inosuke."
  • Adaptation Expansion:
    • The anime adds more at the end of the group's first stay at the Butterfly Estate. In Zenitsu's case, the servant girls scold and advice him to fix his behavior around women, which could be the beginning of Zenitsu's eventual focus on Nezuko instead of random girls, which in the manga happened mostly without warning.
    • The video game by CC2, Hinokami Kepputan, adds a new variation to Zenitsu’s usage of Thunder Clap and Flash as one of his basic attacks called Kiwami, it simply is a more standard Iaijutsu attack, where Zenitsu just quickly unsheathes his blade to attack and sheathes it back before initiating the proper First Form.
  • Aesop Amnesia: Much later in the series, by the Infinity Castle arc, Zenitsu has mostly grown to be a heroic demon slayer, determined to do his part without cowering into fear or self-doubt, but for the sake of humor he will snap back, for a brief moment, to his early crying tantrums when he is in pain or scared of something.
  • Badass Baritone: In contrast to the japanese voice acting performance, where Zenitsu talking through his sleep trance only has Hiro Shimono drop all nervousness from his usual Zenitsu voice, sounding just calm as a result, the english performance in the Mugen Train movie has Aleks Le making his voice sound much deeper, as if trying to hammer the point harder that Zenitsu in his trance is a tough demon slayer.
  • Berserk Button: Don't even hint that you're hiding women from him, or are in contact with women while he isn't. Either you're a bachelor like him, or you're scum in his eyes.
  • Blank White Eyes: Under intense stress to fully charge his Thunderclap Flash: Six-Fold, Zenitsu was portrayed with fully blanked out eyes, for the first time he showed the technique off. His eyes are drawn fully white later to show his imposing figure against Kaigaku, in moments Zenitsu gains the upper hand in their fight.
  • Blood from the Mouth: Whilst fighting the Older Brother Spider Demon, Zenitsu was poisoned and went through great stress to prepare his Thunder Breathing technique to the point he vomited some blood in the middle of his struggle; way later in the series during a comedic extra story Zenitsu vomits blood in pure excitement, as he sees Nezuko wearing a swimsuit, comically dying in the process, it's just a fun extra page though so obviously Zenitsu does not actually die for real.
  • Body Horror: In his bout against one of the spider family demons Zenitsu gets inflicted with a demonic art meant to mutate his body into a demonic spider creature, Zenitsu's arm begins to mutate but in desperation he finds strength to defeat the demon, he then gets rescued and put under intense care to heal his arm which by then had shrunk, starting to mutate into spider claws, in the aftermath however Zenitsu is fully healed.
  • Brilliant, but Lazy: Turns out to be a faster learner than Tanjiro, but only with the incentive of getting to hang out with pretty girls. Not to mention he invents a new Technique for Thunder Breathing.
  • Broken Pedestal: His former superior Kaigaku becoming a demon really, really makes him lose all admiration for him.
  • Butt-Monkey: Due his cowardly and negative forefront personality Zenitsu tends to fall in embarrassing situations due being the first to complain about the current situation he or the group find themselves in, the team going undercover in a Red Light District shows Zenitsu getting the short end of the stick pretty well.
  • Can't Act Perverted Toward a Love Interest: Zenitsu in his desperate attempt to get married as quickly as possible often literally throws himself on women begging for them to marry him, usually in a comedic manner, and at one other time he has proclaimed really well his love for a woman's curves; with Nezuko however he is quite tame, his crush on her is quite the puppy love, innocently presenting her with flowers included.
  • Casanova Wannabe: Hits on girls frequently but unsuccessfully, and often tries to charm Nezuko.
  • Character Development: Used to think small, as in he only wanted to show off as a demon slayer if it could make him the center of attention, especially with girls; later on Zenitsu starts to have more serious goals of becoming strong enough to be able to protect as many people as he can. And when his beloved master is forced to commit Seppuku in shame for another pupil of his betraying the Corps to become a demon, Zenitsu actually starts having a clear goal of wanting to become the Thunder Hashira like his master once was.
  • Characterization Marches On: His attempts to charm girls are phased out as the series progresses, and instead focuses the humor attempts on Zenitsu's jealousy of the mere prospect of someone having a girl while he doesn't, and his freak-outs over harsh demon-slaying training sessions. It can be implied Zenitsu just sort of decided to make Nezuko his main goal, but the series doesn't actually show him making the resolve of forsaking chasing after someone else, and even after meeting Nezuko he tried to charm the Butterfly Estate girls, still after that Zenitsu isn't seen trying to charm girls other than Nezuko ever again.
  • Charged Attack: Can only use his strongest 1st Form variation, Thunderclap Flash: Godspeed, twice in a day; however, by the end of series, Zenitsu has honed the ability further, being able to use it more than twice in a day.
  • Chivalrous Pervert: Zenitsu's colorful rant about women and their curves gave him a bad first impression with the Butterfly Estate girls, but Zenitsu is actually seriously commited to the idea of marrying someone fully intent on loving them, even when it made him suffer, as in the past there were women who entertained him, with bad intentions, like the unknown woman whom Zenitsu had eloped with and piled him with debts, where he had to be rescued by his future swordsman master, prior the beginning of the series.
  • City Mouse: The Databook reveals Zenitsu was born near Tokyo, and he's generally in touch with modern society and the industrial advancements of early 20th century Japan. This puts him in contrast with Country Mouse Tanjiro and Wild Child Inosuke, especially when he's the only one of them who actually knows what a train is.
  • Contagious Heroism: Zenitsu was more of a reluctant coward before meeting Tanjiro, the guy always had some goodness in him but his willingness to act was less prominent, with Zenitsu wanting to avoid danger as much as he could, needing some push for him to act as a hero; working with Tanjiro most of the time, however, has made Zenitsu grow quicker to act on behalf of others as walking with Tanjiro has made him face more danger than he likely would if they never became friends.
  • Coordinated Clothes: The haori Zenitsu wears was given to him by his master Jigoro, they both wear the same triangular symbols pattern; a later series volume extra information makes it more of a bigger deal as it directly differentiates Zenitsu and Kaigaku's views on their master, Zenitsu chose to wear what was gifted to him, while Kaigaku was also given the same haori but he didn't even wear it, this shows which disciple really respected their master.
  • Costume Evolution: After all is said and done, by the very end of the series Zenitsu takes upon wearing his beloved master’s haori, a simple and clear way to show Zenitsu has finally succeeded Jigoro’s wishes.
  • Cowardly Lion: The actual core of Zenitsu's character; on the surface he is cowardly, is always complaining about something, screaming at the top of his lungs that he should just run away and give up on being a demon slayer, turns out that despite of all his incessant tantrums Zenitsu never actually runs from the heat of battle, to the point he just developed a kind of trance sleep mode where he can bravely fight against his foes while being somewhat unconscious thus unable to fear what is in front of him, and as the series progresses Zenitsu becomes able to fight more as himself instead of always relying on his trance mode.
  • Crazy Jealous Guy: Comically becomes one towards Nezuko after finding out about her, to the point where he attacks her own brother due to a misunderstanding and later threatens to spitroast Inosuke alive after Nezuko mistakenly calls Zenitsu by the former's name.
  • Crippling Overspecialization: Can only use one Thunder Breathing technique (the basic technique), but he is very adept at it, to the point he developed phases for it: Thunderclap Flash —> Six-Fold —> Eight-Fold —> Godspeed.
  • Crouching Moron, Hidden Badass: He's usually a wimp, but when he can still pull through when things get bad.
  • Crush Blush: Zenitsu does this a lot when it comes to Nezuko, from innocently presenting her with a flower to going full tomato red face in his dreams where Nezuko can actually speak normally and reciprocate his advances. His dreams sort of come true when he sees Nezuko finally speaking and thinks she did it for his sake. Of course, she currently isn't able to speak in full sentences, and she ends up breaking his heart by accidentally calling him Inosuke.
  • Curtains Match the Window: While this is a theme with several other characters in the series, Zenitsu is the one that sticks out the most, his whole yellow thunder theme is all over his design, blond hair, gold eyes, yellow coat and yellow tint on his nichirin blade.
  • Deadpan Snarker: Zenitsu does not buy into Tengen's flamboyancy, immediately thinking Tengen is completely mental for his extreme personality and demanding to be worshipped as the god of festivities and flamboyancy, insulting Tengen with sarcastic thoughts. It goes into greater sarcasm against Kaigaku, whom Zenitsu finally talks back to, Zenitsu showers Kaigaku with insults as the disciple who could never learn the first Thunder Breathing form and who couldn't be a successor to their master.
  • Declaration of Protection: Zenitsu in his never-ending quest to try get himself a lover, self-declares himself to be Nezuko's protector as soon as he finds out she is a harmless demon and sister of his newfound good friend Tanjiro, as he thinks she should be protected at all costs; this is mostly used as a comic motivator for Zenitsu to get up and do his job as a demon slayer and to train harder, in a fight against the Lower Rank One however this is applied seriously, with Zenitsu actually speaking to Nezuko in his trance mode that he will protect her, shielding her from the Lower Rank's attacks as she was fighting alone till then.
  • Desperately Craves Affection: An integral part of his character, used for both comedic and dramatic effect, as Zenitsu grew up as a lonely orphan nurturing a strong need of belonging, wanting to be needed by those around him and eventually be loved by a significant other. Early on this is shown in his comedic failed attempts to charm girls, while the dramatic side is shown through all the challenges Zenitsu is pushed to overcome his flaws, like his cowardly behavior, in order to grow as a demon slayer, hoping others will appreciate him as their hero.
  • Disguised in Drag: To spare Aoi from being forcefully drafted into Tengen's mission of infiltrating a Red-Light District to rescue his contacts (his 3 wives) and exterminate a demon all three boys volunteer to take the mission in her place, but since Tengen really needed female slayers he forces the trio to disguise themselves as girls and apply themselves as courtesans. Zenitsu is the one who stands out the most due circumstances forcing him to go throughout the entire event dressed like a girl, while everyone else had already broken off the disguise during the nerve-wracking fight against the demons.
  • The Dulcinea Effect: If Zenitsu can't muster the inner courage he has to surpass all of his cowardice on the surface, a good way to make him focus and be brave, or at least try to, is finding himself in a situation where there's a woman in peril. Zenitsu will then stop his complaining right away and go for the rescue.
  • Elemental Hair: Downplayed since he doesn't have electricity powers (though Zenitsu got his blond hair color after being struck by lightning), but he is the primary Thunder Breathing user in the story and has blond hair to match.
  • Establishing Character Moment: His proper character introduction gives all the foundation of Zenitsu's character, the bad and the good in him:
    • 1) He is desperate to find himself a lover and marry right away.
    • 2) He is quite easily scared and overreacts to near everything; upon close inspection, however, Zenitsu never skips on his fights when the chips are down.
    • 3) Zenitsu says he is weak and needs to be protected, while, in fact, his strength is pure speed; his fight record and achievements do not lag behind any of his friends.
    • 4) His tantrums makes it seem he only cares about himself, in truth Zenitsu is faithful and shows immense gratitude when he protected Tanjiro's box, Zenitsu had only just gotten close to Tanjiro, and by then he had no idea what actually was inside the box, all Zenitsu knew it was important to Tanjiro, so he protected it with his own body as a shield.
  • Fast as Lightning: Thunder Breathing is a swordsmanship style used by Zenitsu that channels strength into his legs, allowing him to dash at incredible speed to slash enemies with the visual effect of lightning.
  • Finishing Move: The Thunder Clap Flash is the only form Zenitsu has managed to learn in his Thunder Breathing style, but he has mastered it to an extreme degree where his one move is pretty much the battle finisher as Zenitsu created several phases within the technique to make the Thunder Clap Flash as powerful as he can possibly make it out to be; Zenitsu later creates a technique all by himself, the 7th Thunder Breathing form: Flaming Thunder God which is pretty much a certified battle destroyer move.
  • Flash Step: The main application of the Thunder Breathing style, while all demon slayers must be fast to move and quick to draw their blades a Thunder Breathing user will go beyond that and be ridiculously fast to the point even demons will be surprised by their speed, Zenitsu is so adept at the only real Thunder Breathing technique he mastered that it makes him lightning-fast to incapacitate and kill demons, making up for the lack of skill in the other Thunder Breathing forms.
  • Flower Motifs: In an author’s description of Nezuko’s thoughts on Zenitsu, Gotouge Koyoharu has stated that Nezuko, in her childlike mind, innocently sees Zenitsu as a funny-looking dandelion; Zenitsu’s supernatural blond hair, and the way it stylized, does pass said impression.
  • Fragile Speedster: The one Thunder Breathing technique he can use makes him incredibly fast, but he lacks in other departments. The Flaming Thunder God technique, however, is both fast and powerful enough to slice through an Upper Rank's neck.
  • Friendless Background: A crucial point of his backstory, Zenitsu had no true friends before meeting Tanjiro, the guy really had a need to belong since he had no family, which prompted himself to try being part of any group of people when he was younger, however, Zenitsu’s cowardly and crybaby moods either quickly made others want to stay away from him, or fake tolerance to later scam him. Nobody before his master, and later Tanjiro, bothered to notice Zenitsu’s good qualities beyond his apparent faults.
  • Friendly Rivalry: Tragically ends up as only one part thinking it had any friendship in-between, Zenitsu admired Kaigaku as his colleague in training despite all the volley of insults the two threw at each other, turns out Kaigaku really hated Zenitsu and betrayed their master to seek more power as a demon, then mocking their master's suicide by Seppuku in order to atone for Kaigaku's betrayal, that made Zenitsu lose all of the little respect he had for Kaigaku, fighting and killing him.
  • Glowing Eyes of Doom: The anime adaptation added more fanfare to Zenitsu's absolute body stress to initiate the steps to augment the power of his Thunderclap Flash attack, in the manga it showed white eyes, the anime made it go white and then added glowing effects of light and thunder.
  • Green-Eyed Monster: Admits that he was more infuriated about the fact Tengen is quite the handsome man, and has three beautiful wives, than being forced to disguise himself as a female courtesan for their covert demon slaying mission, that however is Played for Laughs and is just one of the many times Zenitsu sees, or simply mistakes, other men having better luck with women than him.
  • Grew a Spine: The conclusion of his character arc; Zenitsu finally forces himself to grow out of his self-deprecating mental abyss, forsaking his sleep trance mode entirely, when the tragedy of his master’s death strikes, going on to face the cause of said tragedy in the form of his former fellow disciple, Kaigaku, who now turned into a demon, traitor of the demon slayers; Zenitsu faces Kaigaku head on, and kills him, the older disciple whom Zenitsu was completely submissive to before due seeing himself as inferior and partially out of respect, despite their differences Zenitsu still wanted to see him as a brother before everything went south.
  • Happily Adopted: Having no parents and living an early life where he tried to make a living by walking in groups of equally aimless orphans, then getting saddled with a woman piled with debts, Zenitsu was taken in by a swordsman demon-slaying master; Zenitsu grew fondly of him, going on to affectionally call him grandpa.
  • Heroic Second Wind: Pretty much what Zenitsu's sleep trance mode amounts to, Zenitsu at first will seem completely harmless as a demon slayer, cowering and screaming his lungs out about how he cannot perform his duties properly; the demon will buy into Zenitsu's apparent incompetence, underestimating Zenitsu's capabilities and going for the seemly easy kill, Zenitsu may suffer some initial damage but then falls asleep, his trance mode kicks in and the battle pretty much turns on Zenitsu's favor with the demon in complete disbelief on how the apparent weakling suddenly became so strong; as the series progresses Zenitsu starts talking while in his sleep trance mode, showing his personality also gains a huge confidence boost, it tops off with Zenitsu not needing his trance mode anymore, he becomes confident enough to fight his battles with his eyes open.
  • Heroic Self-Deprecation: The darker side of his need for validation from those around him, Zenitsu harbors some deep self-esteem issues from his past where he quite never found a group of friends he truly belonged to, feeling he was useless and then getting called as such after being abandoned by past acquaintances, Zenitsu started to believe he really doesn't amount to anything as a person and only kept taking the path of the sword out of respect for his master and the waning hope that maybe someday someone will see him as their hero.
  • Hidden Depths:
    • Is much more familiar with the advancements of the wider world than one would think. For example, when boarding a train for the first time Zenitsu is the only one to know what it is, while Inosuke takes it to be the "master of the land" and tries to fight it while Tanjiro (a "country bumpkin" in Zenitsu's own words) reasons that it could be a guardian spirit. A volume's extra illustration comically shows the trio's reaction towards Tengen revealing that his mission would take place in a Red Light District; naturally Tanjiro and Inosuke have no reaction as they have no idea what that place means, Zenitsu, on the other hand, is fully red and fidgety upon hearing it and awkwardly asking both unamused boys how can they not know what a Red Light District is.
    • Because of his enhanced sense of hearing, he's an incredibly good musician who can play back any song after hearing it once.
    • Beneath his insufferable behavior and lecherousness, Zenitsu is a profoundly sweet young man, this being the reason why the people that know him are tremendously fond of him.
  • His Own Worst Enemy: Zenitsu is too obsessive, grabby and clingy for the comfort of the women he meets. As he approaches women with unbound zeal and behaves like a showoff, instead of approaching out of a sincere drive to help and sympathize (like Tanjiro does), said women generally dislike him. Sure, he's a nice guy... but he's no gentleman.
  • Holier Than Thou: Played With. While not outright stated, he feels he is more moral compared to others and constantly chastises his comrades for their antics, yet he does things that are more or less far from moral, in other words, he displays self-righteous behaviors, such as trying to propose a girl in a desperate way, creeping them out, and blame others for things that either aren't their fault or have little control of, and is even quick to assume the worst of them. When he found out that the demon Tanjiro was carrying was a cute girl named Nezuko (who was also his sister), his first assumption was that he was all lovey-dovey with her, and began to attack and scream at him for it without giving him a chance to explain.
  • Hypocritical Heartwarming: In a flashback, Zenitsu got into a fight with some fellow Demon Slayers when they mocked Kaigaku for not being able to perform the first form of Thunder Breathing. Zenitsu never liked Kaigaku, but he did respect him, at least before he found out Kaigaku became a demon and caused Jigoro to commit seppuku.
  • Hypocritical Humor: Another source of the comedy attempts on Zenitsu's behalf, it gets explored more once his cowardly lion antics start to take a back seat; Zenitsu freaks out when other people do, or he mistakes them as doing it, exactly what he himself would like to do, as in Zenitsu throws himself on a random girl imploring she marries him, when he is on demon-slaying duty, but loses his mind when he mistook Tanjiro and Nezuko as a pair of lovers instead of siblings, babbling about the serious duty that is demon-slaying, so fooling around in love is taking their duty lightly; he repeats this episode at the beginning of the Red Light District arc, mistaking the recon and rescue mission as Uzui wanting to score himself a woman to have as his wife.
  • Iaijutsu Practitioner: At least when he's asleep, Zenitsu can draw his sword, slice, and sheathe it so fast that you can barely even see it leave the scabbard, as seen during his "fight" against the tongue demon: one moment, Zenitsu's hand slightly twitches and exposes only a tiny bit of the blade, the very next instant, the demon's tongue is already severed. He then finishes things off by combining this with a Flash Step to decapitate his foe.
  • I Just Want to Be Loved: A place to belong with people who wish good things upon him, that's what Zenitsu wanted as he laments never having a place to himself by being orphaned, possibly abandoned at birth, and no one ever expecting anything out of him, labeling him as worthless; Zenitsu felt prey to people in the past who took advantage of his need to belong by faking a bond with him, using and abusing the guy. However that's all in the past as Zenitsu realizes that meeting with his master, Jigoro, changed that situation, with his master he found a place to be and someone who honestly wished him good, and that extends, even more, when Zenitsu finds Tanjiro, Nezuko and Inosuke, his honest friends.
  • I Just Want to Be Normal: While Zenitsu has an inner dream where everyone sees him as a hero who can be relied on to always protect them, thus being a wish of someone who wants to be special in the end, the boy used to gravitate mostly towards thinking that the demon-slaying life really isn't for a person like him, asserting that a normal, humble life where he lives quietly and builds a family is the best outcome he could ever hope to achieve.
  • I Just Want to Be Special: His life as an underachiever who could never really make real friends, or ever be center of attention, left Zenitsu with a burning desire that for a person like him only becoming someone special could make people truly like his company; special in Zenitsu's case means becoming a demon slayer who can defeat any nemesis and be loved by people everywhere he goes, this desire of his clashes directly with how much of a negative person he is towards himself, while deep down Zenitsu wants to reach greater heights, on the surface he thinks of himself as someone who will just die at every demon encounter thus having any aspirations would be a waste.
  • Imagine Spot: In the second Light Novel during the event in which Tengen, Zenitsu, and Inosuke go to the Hot Springs, Zenitsu wastes no time imagining in vivid detail how Tengen's wives, Hinatsuru, Suma and Makio, would take baths together.
  • Informed Ability: At the height of Zenitsu's supernatural hearing, it was stated he can even hear someone else's thoughts, however, that is never put on display throughout the series; the best showcase of Zenitsu's hearing is him being able to somehow "hear" how good a person is through their body movements, speech and breathing, that's how Zenitsu devoted himself to Tanjiro as a great friend.
  • Informed Flaw: During the curse induced dreams the heroes have against the Lower Rank One fight, Zenitsu appears like a caricature of himself in Kyojuro and Inosuke's dreams as a stereotypical man with overbite teeth formation in a very exaggerated manner, that contrasts greatly with his normal appearance where no flaws in his face can be seen, and that would be ok since those were just illusionary versions of Zenitsu, however in a volume extra the author does say Zenitsu really has overbite, but outside the caricature version of him it just can't be seen.
  • It's All My Fault: After defeating Kaigaku, in his near-death vision of the afterlife, Zenitsu talks with his master one last time, blaming himself for his master's seppuku in atonement for Kaigaku's betrayal and for the latter's betraying them in first place; Zenitsu reasons that if he wasn't such a coward and an incompetent disciple he wouldn't have brought shame to his master, that if he was as good as Kaigaku their master wouldn't have felt the need to try to atone for one of his best disciples turning over to the demons. The master however doesn't agree with Zenitsu, honestly believing Zenitsu has always been his pride and joy, as previous flashbacks shows the master supporting Zenitsu at every turn, even if he tried to run or cry, the master saw through Zenitsu's layers in that beneath all the apparent fear the boy never actually stopped trying to make through the master's training regime, all paying off with Zenitsu defeating Kaigaku who was seen as the much stronger disciple by others.
  • Let's Get Dangerous!: He completely drops his usual cowardice when facing his treacherous former fellow pupil Kaigaku and showcases that he's a true heir to the Thunder Breathing techniques.
  • Lightning Can Do Anything: Apparently lightning can grant permanent perfect hair dyes. Zenitsu who was once black-haired got a free dye job from a lightning bolt striking him, turning him permanently blond.
  • Locked into Strangeness: Used to have black hair until a bolt of lightning struck him, somehow permanently turning his hair blond. The official High School A.U. has Giyu telling him to dye it black since dyed blond hair isn't allowed at school.
  • Lovable Coward: Despite always being terrified, he always jumps to save his friends.
  • Love Martyr: Thankfully for Zenitsu this is just a small part of his backstory, and he isn't exploited again in current events; due his ongoing gag of wanting a girl to marry him Zenitsu has actually found some women in the past that pretended to entertain him instead of just rejecting his desperate advances like the comedic side of his attempts usually go, those past women all tricked Zenitsu and never stuck with him, he knew those women were bad but he really wanted to have someone by his side, fearing he will die alone as an orphan since childhood.
  • Meaningful Name: His given and family names are rooted in his character:
    • Zenitsu means "goodness", shedding light on his deeply good natured personality underneath his apparent immediate flaws such as his whininess and cowardice.
    • Zenitsu's family name, Agatsuma (我妻), can be read as Wagatsuma meaning "My Wife", it can be related to the running gag of Zenitsu being desperate to find himself a wife, as he sometimes upstages his attempts at charming girls with the immediate proposal of marriage.
  • Mood-Swinger: Used for comedy effects whenever a scene calls for getting Zenitsu out of his comfort zone, that is getting him to go through a demon-slaying mission despite his cowardly tantrums, Zenitsu will go from a seemly well behaved person to an incredibly nervous train wreck, yelling at the top of his lungs about how he is going to die at any second; another is getting him to train under a deadly regime, Zenitsu will immediately lose his mind and curse whoever thought of planning that training session, and when Tanjiro is there to make a counterpoint about how a deadly regime can get them better results at getting stronger, Zenitsu will unleash his fury at someone he once said was his great friend, only to pull a complete 180 degree turn on Tanjiro once he praises Zenitsu for being an important reference to others training as well, making Zenitsu then think his presence at the program really is necessary and that training isn't so bad after all.
  • Motor Mouth: In his fits of rage over attracting girls or believing someone else has a girlfriend, he'll start delivering huge speeches over how they're scum, according to himself, they are for that, and that they should be ashamed. And if you try to interrupt him, he'll get even louder.
  • Multicolored Hair: He has blond hair with orange ends.
  • Mundane Utility: Zenitsu's superhuman sense of hearing came in very handy during the undercover investigation in the Red Light District arc, as he disguised as a cross-dressed courtesan didn't quite have the looks to pass himself as a beautiful woman but could still entertain guests with his Shamisen playing skills, his super-hearing could make him be fully capable of playing any song he had heard just once, as the sounds are perfectly ingrained in his memory.
  • Mysterious Past: In contrast to his fellow main characters, Zenitsu’s past isn’t shown in much detail, and anything before his life as a young child who lived among wandering children is completely nebulous. The first databook reveals Zenitsu was born near Tokyo, but who his birth parents were, why they abandoned him, or who actually named him isn’t ever disclosed. The second databook released after the series’ end, which contains specific family trees for the characters, follows with not saying anything about Zenitsu’s birth parents, it simply states he was born out of a father and a mother, both nameless factors; in the end Zenitsu’s story was truly about the destination, his birth parents truly may be completely irrelevant, just another case of child abandonment.
  • Near-Death Experience: In the aftermath of Zenitsu's winning bout against Kaigaku he has a vision of the river of death, Zenitsu sees his beloved master on the other side, Zenitsu apologizes for not being a good pupil and preventing his death. The master, however, cries tears of joy and tells Zenitsu he has always been his pride and joy. Zenitsu tries to cross the river to his master's side, but spider lilies bind his feet, preventing him from crossing over, symbolizing how it's not Zenitsu's time just yet, before he gets reanimated back to life.
  • Nervous Wreck: Zenitsu is a capable guy when he finds the courage to brave through killing demons, or just resorts to his trance sleep mode where he fights in a state where fearing the enemy isn't possible, but he tends to freak out like no tomorrow at every single thing before he shows his true colors.
  • Nice Guy: Don't let his apparent cowardly antics fool you, Zenitsu is actually just as much of a nice guy as the ever selfless Tanjiro is; Zenitsu has gone on record of being nice to people he had only met for minutes at most, and being good to people he actually knew didn't even like him because Zenitsu just wanted things to be better, and even Inosuke whom he is always butting heads with, Zenitsu tried to cheer him up along with Tanjiro after the Spider Family fight left Inosuke feeling he was weak and useless.
  • No Respect Guy: In spite of his relatively equal level to Tanjiro, he gets no recognition for his merits (especially from girls) because he's lazy, complacent, wimpy and cowardly. He's a good guy and an excellent warrior, but he's incredibly annoying.
  • Offscreen Moment of Awesome: A few moments where Zenitsu uses his body to protect others take place completely offscreen, the first being where he saves Shoichi from a fall out of the Drum House's upper floor, Zenitsu apparently saved the boy and hit his own head in the process, bleeding from the concussion; another is during the Mugen Train arc, Zenitsu saved Nezuko and a few passengers by embracing them and taking everyone out of the colliding train after Enmu's defeat, yet again hitting his head hard, bleeding from the impact.
  • One-Hit Kill: with Zenitsu's signature Iaijutsu discipline for his Thunder Breathing, his fights against demons who don't measure up to him usually end in a single attack of his, a swift slice through the neck, instant decapitation.
  • OOC Is Serious Business: He completely drops his normal cowardly attitude when confronting Kaigaku for becoming a demon, causing their master to commit seppuku alone and leading him to die a slow and agonizing death.
  • Parental Abandonment: It was briefly touched upon that Zenitsu has no parents, although it hasn't been revealed whether they abandoned him or they died (though Zenitsu believes they abandoned himnote ). After living a harsh early life Zenitsu was taken in by his Demon Slayer master, who Zenitsu views as his grandpa.
  • Prone to Tears: Boy does he ever, it is mostly used in comedic effect to either show Zenitsu reacting to being rejected by a woman for the umpteenth time or his crushing fear of fighting against demons while being a professional demon slayer himself; however, there are memorable times where his tears were used for dramatic and awesome moments.
  • Rage Breaking Point: Zenitsu had a very subservient relationship with his elder colleague disciple Kaigaku, the latter couldn't stand the former's presence due Zenitsu's difficult behavior as someone with low self-esteem who seemly wasn't showing much progress while being trained under the same master, even so Zenitsu tried to make things work with Kaigaku by respecting him; all goes down south when Kaigaku betrays the demon slayers to become a demon himself and as a form of atonement their master commits seppuku to pay the price of shame, with that Zenitsu loses all little respect he had for Kaigaku and showers him with insults and hard truths in their fight to the death, to the point Kaigaku even sarcastically compliments Zenitsu for finally talking back to him.
  • Rousing Speech: In the later moments of Muzan’s fight, in the Infinity Castle arc, after many slayers have been battered up to near-death, and Tanjiro had just been hit by a powerful shockwave emitted by Muzan, everything looks dire; Zenitsu steps up to save Inosuke from an attack and pushes himself to lift Tanjiro’s morale up, as the latter laid down in almost a convulsion state, telling him that he cannot die, Tanjiro has to live through that incredibly deadly fight and go home with Nezuko, who had just turned human, Zenitsu being alive and boosting his morale moves Tanjiro to tears. Zenitsu who was once a cowardly slayer, who had to be pushed over the edge and motivated to fight, now steps up on behalf of others, motivating them as well.
  • Running Gag: At first it seems the jokes on Zenitsu's behalf are those played upon his cowardice and wanting to score a girl, in truth it is his extreme mood swings that form a circle around all the attempted humor with his character; coward tantrums, wanting to impress a girl, losing his cool over harsh training sessions, having little patience for eccentric personalities (while he is one to talk), jealousy of others having a mate, all of that is to instigate an extreme chain reaction of emotions on Zenitsu.
  • Selective Obliviousness: Jumps to conclusions when he sees Nezuko for the first time, attacking Tanjiro believing that she was his lover. Once he learns she is his sister, his treatment of him was never brought up.
  • Serial Romeo: Zenitsu immediately forgets about the previous woman he desperately asked to marry him upon finding a new target; the only one he hasn't let go is Nezuko, partially because he might like her more than his usual crushes on first sight and that Nezuko is a nice demon girl in a state of mind where she really can't decide or understand complex things yet, she is just nice enough not to repudiate Zenitsu on sight.
  • Shock and Awe: Thunder Breathing adepts have lightning sparks all over their techniques, Zenitsu is given more fanfare due to how much he overexerts his usage of the Thunderclap Flash; however, all the lightning is just a visual effect of portraying elemental affinity to the technique's main aspect, speed. That said, the times where Zenitsu used his technique to its fullest potential at given points in the story, it was noted a sound “like thunder” could be heard coming from his actions, implying Zenitsu is actually breaking speed barriers when he goes all out.
  • Significant Wardrobe Shift: Zenitsu at the beginning of the story was a meek, whining and reluctant demon slayer, he only became a warrior to show gratitude towards his master Jigoro, who once saved him, wearing a bright yellow haori, given to him by Jigoro which is themed after his own haori. In the very end of the series Zenitsu takes up his master's haori, who died before Zentisu could show how much stronger and courageous he grew to be, but Jigoro could see that from the afterlife, personally congratulating his pupil, thus Zenitsu has successfully inherited his master's will after he has helped to kill the source of all demons.
  • Single-Stroke Battle: When Zenitsu fights against weaker demons it goes accordingly to the theme more precisely, in one single stroke of his Thunder Breathing Style, which invokes an Iaijutsu discipline, Zenitsu quickly dispatches the foe with a swift slash to the throat; on longer battles however Zenitsu tries to charge his speed to a ludicrous degree till he blitzes through the area, all to find that sweet spot to behead the enemy.
  • The Slacker: In Zenitsu's case it is more of a combination of his bad self-esteem and fear of getting hurt in any way possible, so he hates any kind of training that will force him to put more effort than he personally would like to give, with that Zenitsu must really be coerced in a way that will make him go through it even if complaining along the way, two popular methods are he himself feeding on his dreams that getting stronger will make Nezuko fall for him, and the other is filling him with praise, Tanjiro honestly believes in Zenitsu so that usually works, but also Shinobu pretended to cheer Zenitsu up to get him going. The tragedy with his master's death made Zenitsu be serious about his training and future without others forcing him, however.
  • Sleepwalking: Except with fighting. He fights with pure instinct when unconscious.
  • The So-Called Coward: His constant cowering against having to face demons in battle already looks odd enough due Zenitsu never actually running away from his duties as a demon slayer, crying on the way to battle but still fighting nonetheless; the full realization comes when Zenitsu's rivalry with a former colleague of his comes into play, Kaigaku was said to be Zenitsu's total opposite, he actually learned most of the Thunder Breathing forms and always made sure to brush on Zenitsu's face how much of a failure and a coward he was, but in the end it was Zenitsu who stuck to the Demon Slayer corps always fighting against demons, while Kaigaku was revealed to be a true coward who immediately threw his life away for more power as a demon; resulting in Zenitsu killing his supposed stronger colleague turned traitor.
  • Spell My Name with an "S": While Zenitsu is the most common way his name has been spelled for western audiences, a more proper romanization would be Zen'itsu to indicate its correct pronunciation, there's emphasis on the Zen (Zen - i - tsu) instead of saying it like Ze - ni - tsu. Then there's the author herself trying to give it an original spin, Gotouge has said the emphasis on the "tsu" should be bigger than on "Zen".
  • Split Personality: A downplayed example; Zenitsu at first glance is cowardly and whiny, however, the sleep trance he developed for unconscious combat is pretty much the ideal version of himself that Zenitsu dreams, but thinks it is impossible, of becoming. In later events when Zenitsu starts talking during his trance, he is shown to be very brave and just, fully in tune with all the results of his Thunder Breathing training, in this state Zenitsu remembers everything that happened while he was awake, meanwhile the normal Zenitsu does not remember what he did during his trance, furthering his own perception that he is weak and worthless. In truth awake Zenitsu and trance Zenitsu are the same person, it’s only that during sleep Zenitsu removes all of his immediate flaws, which eventually reaches the natural conclusion of Zenitsu forsaking the need of his trance, becoming a hero fully aware of himself.
  • Super Hearing: His hearing is very acute, and he can even tell people apart by the way their bodies sound.
  • Super Speed: While the most capable Demon Slayers have superhuman speed by default — they couldn't keep up with the much stronger demons if they didn't — Thunder Breathing adepts are on a tier of their own. At the peak of their abilities even demons cannot keep up with their speed; Zenitsu, when he gets serious, moves so incredibly fast that even two Upper Ranks were not able to follow him at all.
  • This Is Unforgivable!: Zenitsu was absolutely pissed at Kaigaku for becoming a demon, resulting in his master committing suicide to atone.
  • Through His Stomach: Comically asked Nezuko to marry him on the prospect of feeding her Sushi and Eel every day, which resulted in a failed attempt because Nezuko's mind as a demon was not able to understand what Zenitsu was proposing on that event. Plus, Zenitsu's attempt gets ruined when Nezuko calls him "Inosuke".
  • Throw the Dog a Bone: It seems like he and Nezuko do hook up after the fight with Muzan, seeing as how their descendants in Modern Day Tokyo bear a resemblance to him and her.
  • Too Kinky to Torture: As long as the one doing the "Torture" is female, he won't mind at all.
  • Took a Level in Badass: As the series progresses Zenitsu starts having more battles in which he doesn't cower into his sleep trance mode to fight without fearing his opponent; a shining example is the fight against his former colleague pupil, Kaigaku, who betrayed their master and team by turning into the very demon kin they are supposed to hunt, Zenitsu fought against someone who was touted as superior to him as a human, then becoming a demon even more powerful than a regular demon, and Zenitsu actually won. Zenitsu has even toughened up to fight against Muzan in his strongest form and managed to damage Muzan for everyone fighting him.
  • Unconscious Objector: Zenitsu has defeated enemies while unconscious.
  • Undying Loyalty: The shining quality that makes Zenitsu stand out beyond his apparent cowardly and whiny behavior; Zenitsu will bury all his flaws within when it comes to giving his whole self for people who were honestly kind to him and believed he could reach greater success in life. Zenitsu is at first scared of fighting demons as he fears he could die at any moment, but Zenitsu's master trained him with so much care that he will never abandon the sword; Tanjiro is such a good-natured person that Zenitsu pretty much decided quick enough that Tanjiro is someone whom he should unquestionably trust and put his life on the line by facing all sorts of mortal battles with.
  • Unexpected Successor: Among Jigoro’s students there was a clear divide between the eldest disciple Kaigaku and the youngest Zenitsu; Kaigaku was a seen as the much stronger one, who was keen on being Jigoro’s successor, while Zenitsu had no expectations on being Jigoro’s chosen one at the time, as the boy seemed to lack talent and any drive to push forward. However, throughout the series Zenitsu slowly but surely grows past his limitations, and Kaigaku turns out to be a nasty traitor who becomes a demon, who Zenitsu then kills. In the end Zenitsu wears Jigoro’s haori, being his sole successor, Zenitsu himself never thought he would be the one to succeed his master.
  • Unlocking the Talent: Zenitsu is of the lazy and extremely self-depreciative variety, he was brought in by a sword master by pure chance, as Zenitsu was piled with debts after eloping with a woman who didn't care for him until his master rescued him from that predicament thus Zenitsu never really saw himself becoming demon slayer, it just happened. Zenitsu endured the hard training imposed on him but it seemed Zenitsu had no talent at all, he just couldn't learn any Thunder Breathing form beyond the first one, said to be the most basic and easiest to learn, however as the series progresses Zenitsu slowly but surely is pushed by those who care for him to break through his mental blocks and show that he has some talent underneath; Zenitsu has pushed the most basic Thunder Breathing form to unseen heights, making it a terrifying technique against demons, and later he creates his own form: the 7th Style - Flaming Thunder God, which is quite the battle finisher move.
  • Unusual Eyebrows: The forked kind.
  • When All You Have Is a Hammer...: Only managed to learn one of the Breaths of Lightning techniques, Thunder Clap Flash. When that doesn't work, he just does it faster. However, he then managed to invent a seventh Thunder Breathing technique which he uses against his former superior.
  • Wild Take: Despite its somber tone with all the demon-slaying the series does not shy away from many comedic moments, the characters pull the most extreme face reactions imaginable, Zenitsu is the undisputed king of it as he is the resident overreacting wreck of the bunch.
  • Would Hit a Girl: Zenitsu’s sense of justice is greater than his very pronounced love of women, he drops any pretense of holding a vow of never hitting a woman if it is a very vain, abusive courtesan who turns out to be a demon in disguise; to note Zenitsu is completely set on passing judgement on Daki for her evil deeds, to the point he never cares about how beautiful she is.
  • Wouldn't Hit a Girl: In his self-proclaimed status as a gentleman Zenitsu says he won't harm girls, not even throw tea on them despite it being part of the focus and agility training in his first stay at the Butterfly Manor, however this gets him no applause from Aoi, and the other girls as they overheard Zenitsu's colorful rant about women, their curves and how he longs for even catching a glimpse of them; against demons, on the other hand, Zenitsu doesn't play the gentleman card, if it's a human devouring monster Zenitsu won't care if it is female, he will go for the kill.
  • You Are Better Than You Think You Are: The driving force on the arduous path to make Zenitsu grow up. The boy has abysmal self-esteem thus he thinks nothing will ever come out of him putting any effort in doing anything by himself, that's where people who expect something out of Zenitsu come into place to give him that much-needed confidence boost, his master Jigoro was the first to see something underneath Zenitsu's layer of cowardice and laziness, Tanjiro was the second; in the moments Zenitsu realizes there are people out there who believe in him, those are the events where he shows what he can really do, and he does not disappoint when things get going.

    Inosuke Hashibira 

Voiced by: Yoshitsugu Matsuoka (JP), Bryce Papenbrook (EN), Uraz Huerta (Latin American Spanish)
Live actor: Yugo Sato (Stage Play)

https://static.tvtropes.org/pmwiki/pub/images/inosuke_hashibira_anime.png
Click here to see his face 
"PIG ASSAULT!"

The second member of the Demon Slayer Corps to join Tanjiro and Nezuko. He grew up alone in the mountains and wears a boar head-shaped mask, pants, and not much else. Brash, overconfident and hot-headed, Inosuke is at first convinced that he'll become the strongest if he defeats the right people, but gradually comes to realize that there are stronger people out there and he can't always take on enemies alone.


  • Abnormal Limb Rotation Range: He can fit through any hole bigger than his head by dislocating his joints. He later comes up with a Breathing form where he dislocates every bone in his arm and moves it like a whip, which has the added bonus of increasing his attack range.
  • Accidental Misnaming: He doesn't seem to be very good at remembering names since he frequently gets Tanjiro's name wrong whenever he addresses him. Tanjiro's Taisho Secrets claims that at first he can only get someone's name right once every seven tries; much later in the series, Inosuke starts calling the names of his closest friends consistently right, showing off his development in this regard.
  • Animal Motifs: Boars. Inosuke wears a mask that resembles a boar's head, he was raised by a wild sow, and he can be quite dangerous when provoked (or even when he isn't). Tanjiro notes that Inosuke tends to aim low when striking an enemy, much like a real wild boar would. The "Ino" (伊之) in his name is a pun, as it's pronounced the same as "猪" (Inoshishi/Ino, the kanji for "boar").
  • Attack! Attack! Attack!: He hates thinking and loves fighting, so this tactic comes naturally to him. Even against a demon with flesh too hard to cut, he simply applies increasing force on the back of his sword with his other sword repeatedly until he makes progress, forcing the blade through.
  • Barbarian Long Hair: Men with long hair are common in the story, but Inosuke's hair is particularly shaggy and disheveled, emphasizing his feral nature.
  • Belated Backstory: It's not until Chapter 160, over a hundred chapters after his introduction that the circumstances behind how he got raised by a wild sow are revealed by Doma, who had known his biological mother before he killed her.
  • Berserk Button: Definitely has a lot.
  • The Berserker: His fighting style boils down to him charging into battle full force without any sort of strategy and attacking wildly in an animalistic fury. Especially played straight when Inosuke gets angry enough that he'll lose all rational and will keep attacking until his enemy is defeated. This is also similar to how a real boar would attack by constantly charging and ramming into their opponents, also like Inosuke they are known to be very reckless and very angry whenever they are provoked.
  • Big Damn Heroes: When Kanao is on the verge of defeat by Doma, Inosuke comes in with a Dynamic Entry through the ceiling to cancel out Doma's attack.
  • Big Eater: Oh boy, Inosuke can sure eat a lot when it comes to food.
  • Bishōnen: Downplayed. He has feminine features under his boar mask in stark contrast to his muscular build, much to the shock of Tanjiro and Zenitsu.
  • Blood Knight: Inosuke loves fighting and he'll gladly challenge anyone, human or demon alike.
  • Boring, but Practical: His Breathing style is relatively simple and not very flashy in terms of technique as he uses very simple attacks.
  • Borrowed Catchphrase: He briefly adopts Tengen Uzui's catchphrase of "Flamboyant" during the Red Light District arc, showing how much Inosuke admires the Sound Hashira.
  • Brainless Beauty: He may be a gorgeous Bishōnen with a sculpted body, but he's thicker than porridge and outright refuses to use what little brainpower he has.
  • Broken Tears: In Chapter 163, Inosuke is shown crying after realizing that his mother really did love him.
    • He suffers this again when he realizes that he cannot strike down Tanjiro after his transformation.
  • Catchphrase: "PIG ASSAULT!"
  • Chaotic Stupid: Endearingly so. He'll randomly attack his teammates both outside of battle and in the middle of one against a foe he can't take by himself. Its usually punctuated by an awkward pause in his boar's head, where its clear he's being given too much time to reach his own conclusions, which are always crazy.
  • Character Development: At first, Inosuke is extremely ignorant of his surroundings and thinks he can just brutalize everything in his path because it actually worked for him until then. After the encounters with the spider demon family and Upper Rank 3 Akaza, he gets a first-hand taste of how difficult it is to fight against really dangerous demons. Since then, Inosuke has taken a more open approach to training and teamwork; he's still hard-headed, but not to the extent of thinking he can take on the whole world by himself. He also grows kinder and more affectionate towards his friends (in his own crude way), culminating in being unable to strike a demonically infected Tanjiro down during the final battle.
  • Comically Missing the Point:
    • When Zenitsu mocks him for being inexperienced with women, Inosuke misconstrues his meaning and brags that he's stomped on female children before.
    • When Tanjiro tells him two Demon Slayers should never draw their blades against each other, he starts fighting barehanded.
  • Contortionist: Inosuke is so flexible that he can bend backward until he's holding his ankles in his hands and sticking his head between his feet. With freshly broken ribs.
  • Culture Blind: As a Wild Child who was raised by a wild boar, he has no comprehension of civilized culture. Besides never bowing or using honorifics, he reacts to an old woman performing kiribi, a ritual for good fortune, as if she were threatening him.
  • Dual Wielding: Uses two swords.
  • Dude Looks Like a Lady: Make no mistake: Inosuke is profoundly beautiful under that boar mask, so much that Tanjiro and Zenitsu both needed to do double-takes the first time Inosuke first unmasked himself before them. He can effortlessly pass off as a girl to infiltrate the Red light district, to the point that the handlers of a brothel sincerely think that they struck gold when they see him.
    Zenitsu: “To see a muscular guy with a face of a girl sure is disturbing.”
  • Dumb Muscle: Easily the most physically powerful of the three main demon slayers, and definitely one of the least intelligent characters in the whole cast.
  • Expressive Mask: Inosuke spends most of his time wearing a boar mask, presumably skinned from a real boar, to portray his feral warrior nature. The mask is usually still like a dead animal's skin should be regardless of what Inosuke is saying or doing, but in some comedic moments, Inosuke's reactions will make the boar mask express his emotions through it.
  • Foil: To Genya, to a certain extent. They are both short tempered, angry members of the Corps, but are almost polar opposites of each other. After completing the final selection test, Genya was so impatient, that he attacked Ubuyashiki's daughter whereas Inosuke was so impatient, that he left. They both encountered Tanjiro after attacking an innocent and got their bones broken by him as a result, but their reactions were completely different: Genya attacked Ubuyashiki's daughter and Tanjiro broke his arm and he hated him because of this and refused to talk to him, until they eventually become friends. Inosuke, on the other hand, brutally beat up Zenitsu and Tanjiro broke his ribs in order to stop him. Inosuke was impressed by his opponent and started fighting back, laughing and giving him a rather tough fight and instead of avoiding him like Genya, he kept trying to provoke Tanjiro to fight him again. Genya also doesn't wield swords, while Inosuke is a dual wielder. Genya also can not use Breathing techniques, whereas Inosuke invented his own Beast breathing technique. Appearance wise, Genya is covered in scars that make him look rather scary. Inosuke, on the other hand appears scary because of his Boar mask and is actually a Bishōnen underneath it.
  • Full-Boar Action: While he's not actually a boar himself, he's still heavily associated with them. He wears a mask resembling a boar's head almost constantly, and he tends to be very aggressive and quick to start fights.
  • Good Old Fisticuffs: Despite being a swordsman, he has no trouble putting up his dukes, and fights well enough that Tanjiro can barely manage to deflect his punches.
  • Guttural Growler: He has a strong and deep rasp in the anime adaptation thanks to the voice acting provided by Matsuoka and Papenbrook.
  • Hard Head: It is surprising how much he can headbutt random objects that stem from charging humans to trees and even towards hard metal trains.
  • Hair-Trigger Temper: He gets angry very easily and usually has a tendency to lash out towards anyone thus making his temper wildly unfocused as he has no limits to how angry he can get. Though this is usually Played for Laughs as he is often shown throwing tantrums whenever something annoys him or when his buttons are pressed but he can channel his anger to get himself energized to prove himself or to fight.
  • Hidden Depths: The fact that he's created his own Breathing style, the Beast Breathing, can come as a surprise given his wild fighting style and volatile personality.
  • Hot-Blooded: He's a Large Ham who loves to fight and will usually dive into any situation headfirst, demonstrating his extreme personality even more. His usual outlook on life is to never think but act out with pure bull-headedness, which makes him chaotically impulsive as he neglects any sort of regulations and common sense.
  • Impaled with Extreme Prejudice: During the Red Light District arc, he gets impaled through the chest by Gyutaro's sickle while attempting to flee with Daki's severed head. He survives thank to his ability to shift his internal organs around, but is still heavily wounded.
  • Insane Troll Logic: If he's given enough time to think things through, this will be his conclusion. Listening to his inner monologue doesn't help it make sense.
  • Jerk with a Heart of Gold: He's introduced as a violent Blood Knight who ignores civilian bystanders (even using one as a stepping stone), picks fights with anyone at the drop of a hat, and even trying to go through Tanjiro's box and brutalizing Zenitsu when the latter tries to stop him. He gets better later on as he interacts more with Tanjiro and Zenitsu, and he starts to become more open to working with them as a team.
  • Large Ham: Is pretty much always shouting about something, typically his fighting prowess.
  • Literal-Minded: Tanjiro chastises him for attacking Zenitsu on the grounds that demon slayers must not draw their swords against each other. Inosuke claims to understand, and then proceeds to attack Tanjiro with his fists.
  • Made of Iron: Tanjiro perseveres through countless injuries, but Inosuke isn't even slowed by them. He often has to be reminded of how severe his injuries are because he carries on so roughly.
  • Major Injury Underreaction: No wound stops him, even when he grows feeble with bloodloss or becomes impaired by broken bones. His first instinct upon waking up from a concussion? Trying to pick a fight with the nearest person.
  • Multicolored Hair: He has black hair with blue ends.
  • Never Learned to Read: He outright admits that he never learned how to read or write.
  • The Nicknamer: Much later in the series, after Inosuke learns how to consistently call his closest friends by their correct names (Tanjiro, Zenitsu, Kanao), his more prevalent quirk is the nicknames he comes up for the not-so-close friends, like the Hashira, for example Himejima is the “Juzou Ossan” (prayer beads old man).
  • No Indoor Voice: Is constantly screaming at the top of his lungs, even when indoors.
  • No Infantile Amnesia: Inosuke has very early memories of his mother Kotoha singing him several pinky promise songs when he was a baby. He originally associated the pinky promise with Shinobu when she asked him to pinky swear not to take off his stitches. Ultimately, it took Doma telling him about Kotoha and her songs to jog his memory. Because these memories were so heartfelt and soothing, not to mention Doma outright saying he ate Kotoha, this revelation causes Inosuke to swear vengeance for her death by killing Doma.
  • No Social Skills: Inosuke spent most of his life alone in the mountains, with only a little human interaction when he was an infant. With that, he had little to no experience and knowledge of social interactions. This makes him seem quite insensitive in his early appearances, but it is progressively shown that most of it wasn't done out of real malice, and he really has no idea how to be sensitive towards people. Tanjiro eventually becomes quite the mentor on how Inosuke develops in his empathy towards others.
  • Odd Friendship: Surprisingly, Inosuke and Nezuko are shown to get along quite well together, most likely due to both of them having child-like behaviors. This is best seen when Nezuko starts talking again, and Inosuke ends up teaching her to say his name, even teaching Nezuko to call him "Boss Inosuke". Zenitsu wasn't happy to hear about this...
  • Organ Dodge: During the fight with Daki and Gyutaro, Inosuke is seemingly pierced through the heart and appears to die, but later rejoins the fight and reveals he is capable of shifting his organs around to avoid fatal damage. However, this doesn't protect him from blood loss or poisoned weapons, and he needs to be healed by Nezuko after the fight in order to survive his wounds.
  • Parental Abandonment: He grew up in the mountains with no parents, having only been raised by a wild boar. It's later revealed that his mother had run away to the Eternal Paradise cult to escape her abusive husband, only to be forced to drop Inosuke off a cliff to save him from Doma after she discovered he was a demon eating his followers. She was killed by Doma shortly afterward.
  • Pinky Swear: In a flashback, he made a pinky promise to Shinobu to not undo his stitched wounds at the Butterfly Estate. Shinobu's act of kindness created a bond that Inosuke felt between the two, and this is what motivates Inosuke to avenge her and help Kanao defeat Doma. And with a surprising twist, Inosuke's mother Kotoha would always sing a pinky promise lullaby to him when he was an infant, showing how much she really loved him. This caused him to think that Shinobu was his mother at first until finally realizing that Kotoha was his real mother.
  • Raised by Wolves: Shown in an omake that he was raised by a wild sow.
  • Rebellious Spirit: Inosuke literally rejects any sort of thinking whatsoever and especially neglects common sense proving how little he cares about what anyone thinks of him.
  • Reverse Psychology:
    • Tanjiro inadvertently utilizes this, causing Inosuke to help bury the bodies of the demon living in the house in the woods when he excuses the latter due to his injuries. Later Inosuke starts deliberately stealing Tanjiro's food to provoke him. But Tanjiro misinterprets it, and offers him more, thinking he was just famished. Inosuke then refuses any further food and starts eating his own again.
    • Weaponized later by Shinobu after Inosuke lost his motivation to practice the full breathing technique. She says that it's a fundamental technique and that he should be able to get the hang of it, but nobody will judge him if he is unable to do it. This riles him up enough to throw himself into learning as fast as he can.
  • Right for the Wrong Reasons: The first time Inosuke sees a train, he is terrified and assumes it must be some kind of monstrous creature to Zenitsu's dismay (Tanjiro also has that first impression). It turns out he wasn't completely wrong, as a demon has fused with the entire train.
  • Roaring Rampage of Revenge: After he faces his mother's killer Doma, he vows to kill him in the most brutal way possible and vowed to create a personalized hell for him if one does not already exist.
  • Running on All Fours: Not literally, but he can run and fight with his torso so low and even that Tanjiro feels like he's facing a quadrupedal beast instead of a bipedal human. He does occasionally get on all fours briefly for a burst of speed or to launch himself, but not for sustained locomotion.
  • Scarred Equipment: His dual katanas are so chipped and worn from combat that they look like saws. Comically when he receives two brand new katana, he picks up a rock and chips the blade until they look like the old ones, right in front of the outraged swordsmith who made them.
  • Screaming Warrior: He is literally the incarnation of this trope as he never stops screaming his lungs out and almost can never utter a single sentence without shouting.
  • Serrated Blade of Pain: His swords are worn down and chipped to the point of being almost completely serrated. Even when he acquires new swords, he makes sure to chip the perfect blades into crude saws.
  • Stealth Pun: He is very rude, very crude, completely uncivilized, and has a boar Animal Motif. In other words, he's literally an uncultured swine.
  • Stock Shōnen Hero: Inosuke fits the trope better than the hero, being loud, Hot-Blooded fighter who believes in Strategy Schmategy. However, he is also rude and had been quite callous before he met Tanjiro, and goes into deep depression whenever he finds himself unable to improve.
  • Strategy Schmategy: His favorite plan of attack is charging straight into the fray, and he shrugs off the plans and advice of others like water off a duck's back. At one point he even brags to a demon behaving strangely that it can't make him think.
    Inosuke: "So, you're plotting to make me use my head again, huh? In your dreams!"
  • Strong and Skilled: Surprisingly due to him hating strategy and dislikes thinking before a battle he has the most proficient fighting ability and is without question one of the best fighters in the main group. He is shown to have mastered and created his own Breathing technique while also being very skilled in both armed and unarmed combat and also having very impressive feats of strength which highlight his physical abilities even more.
  • Strong Family Resemblance: Looks near identical to his mother Kotoha, something Doma remarks on.
  • Super Senses: His sense of touch is very acute, and he can feel vibrations in the air. This is also a reason why he doesn't wear a shirt since he believes doing so would dull his senses.
  • Too Hungry to Be Polite: Having grown up alone in the mountains, he's a messy eater and has no table manners. He doesn't even bother to use chopsticks and will just stuff food into his mouth with his hands.
  • Took a Level in Kindness: His first appearance turns into a far cry of how he behaves later in the series. In the beginning, Inosuke was an extremely fight hungry guy who didn't seem to care for actually protecting people against demons; he was more about the thrill of the fight, be a demon, or even a fellow demon slayer. Not long after, however, Inosuke faces a few battles where he feels threatened by stronger foes for the first time in his life, and he feels completely useless for one quick moment after the battle but his friends, Tanjiro and Zenitsu, manage to cheer him just as fast. From that point on, Inosuke begins to act quite reliably in that he starts to listen for battle plans and to save people in the crossfire against demons, yet still remaining quite the battle-crazed slayer but a more reliable one.
  • The Unapologetic: He attacked Zenitsu when he shielded Nezuko. Later, Tanjirou demands to apologize to Zenitsu for attacking him, he refuses.
  • Use Your Head: While his skull isn't quite as rock-hard as Tanjiro's (he got a massive goose egg when their heads collided), he is fond of charging headfirst at enemies like a boar.
  • Vocal Dissonance: He has feminine features under his boar mask, making his deep and raspy voice jarring to hear whenever he takes his mask off.
  • Walking Shirtless Scene: Hates wearing shirts, believing that covering his torso will dull his senses. Even if he has to wear a shirt for whatever reason, he'll usually keep it unbuttoned.
  • Wild Child: Grew up on a mountain with no family, though he's surprisingly good at talking despite this background due to an old man who taught him how to speak through reading poems to him.
  • Wisdom from the Gutter: Inosuke who had been pretty oblivious, borderline insensitive early on, till then on how to react to death happening around him, stepped up to give a pretty rousing speech once Kyojuro died against Akaza, Tanjiro was feeling devastated over his death, thinking Kyojuro lost because he had to look out for demon slayers weaker than him and all 200 passengers on the train, Tanjiro thought it would have been better if he died instead of Kyojuro; Inosuke steps up, telling Tanjiro to remember Kyojuro's words of trust towards them, he trusted that all three boys would become great demon slayers even better than he was, so Tanjiro shouldn't ever think about dying, it would invalidate all hopes for the future placed on him.
  • Would Hit a Girl: He uses Teruko as a stepping stone in Kyogai's house. He also mentions at one point that he's struck female children before, and replies to Kocho's condescending Reverse Psychology by threatening to rip off her breasts.
  • Would Hurt a Child: He uses Teruko as a stepping stone in Kyogai's house. He also mentions at one point that he's struck female children before.
  • Wrong Genre Savvy: Inosuke tries several times to initiate a rivalry typical of the shounen genre with Tanjiro. Tanjiro however is to mature and cool-headed and just ignores Inosuke, much to the latter's irritation.
  • You Killed My Father: Inosuke barks to his mother's murderer (Doma) that he will show him what Hell is like. He doesn't take it lightly either when Doma started to badmouth Kotoha as well.

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