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More information on my Half-Demon! Tanjiro AU!

I really want to elaborate more on my AU, specifically about the demons and how they are dealing with the changes. So, here are some headcanons about them!

Here is the original Mastpost!

Rui

When it came to converting into a half demon, he was rather cautious about the idea, mostly because he didn’t want to lose his “family” and strength

Nezuko managed to convince him by promising to stick by his side while he works out the changes

They spent a lot of time together, which brought them closer and formed a genuine bond

This drove Inosuke insane though

Tanjiro was pretty weary about their relationship, but he eventually grew fond of the little guy

It took quite a while for Rui to truly come out of his shell

But when he did, everyone realized just how touch starved the poor baby is

He melts when given any form of physical affection and he is quite clingy

I headcanon that Rui has OCD, mostly because he likes everything in their proper roles, so I think he would make sure everything is clean and orderly

He tends to get flustered when he is dealing with large messes, so either Nezuko or Tanjiro has to calm him down

Despite the Kamado siblings’ affection and stability, Rui still feels like he’s missing something in his life

That is, until Tanjiro introduces him to Akaza (Tanjiro decided to introduce all the demons to each other)

Akaza and Rui immediately get along and become friends

Eventually, Akaza introduces Rui to the other upper moons (plus Enmu since he’s usually around Douma)

Akaza was rather nervous about introducing Rui due to the moon’s chaotic nature and Rui’s OCD

However, Rui sees that they have a deep connection despite the chaos and decides to stick around

Akaza: Sorry if they’re a bit chaotic kid, bu-

Rui: They’re perfect

Akaza: Huh?!

With time, Rui learns more about the upper moons and they grow on him

Akaza and Kokushibo are Rui’s father figures

Daki and Gyutaro are very close to Rui and they often hang out with the Kamado siblings

Finally Douma and Enmu sometimes drag Rui in one of their pranks or adventures

The Kamado siblings notice that Rui is less tense, more open minded and is a lot happier

Half demons mature and grow, so Rui and Daki do mature and actually get older as time passes

Although he still goes to the Kamadoi’s for comfort, he truly feels like he has a family with the upper moons

character.ai

Chat now with Half-Demon Rui · created by @silver_tooth

Half-Demon Rui: *A strange child walks up to you. His skin and hair are white except for the red connected dots on his skin. He also had red

Akaza

I feel like he would be more open to becoming a half demon (I mean it’s better than dying, right?) so he takes up on Tanjiro’s offer

Akaza regularly has to pull Douma out of trouble, either it be pranks that have gone too far or making him act like a gentleman

Whenever anyone is sick, you can expect Akaza to come over and try to take care of them

He did NOT like Zenitsu when they officially met, but they became mutual once he learned that Zenitsu wasn’t that big of a pervert (mostly because he’s dating Tanjiro)

Akaza deeply respects Tanjiro and they tend to work together on projects involving the demons

Akaza wanted to repair his relationship with Rengoku (which yes, Tanjiro was able to bring him back) and Rengoku has rather nervous to do so

They became great friends, but Giyuu (who Rengoku is dating) doesn’t really trust Akaza

Let’s just say it took a LONG time before Giyuu trusted him

Akaza gives advice to the women (both demons and humans) on how to defend themselves from perverts

Akaza is typically with Rui and Kokushibo, probably doing some father - son activities

Akaza actually gets with Kokushibo after realizing that Koku could be soft

Akaza is a tsundere, hands down.

He’ll never admit that he likes being the little spoon or that he loves sitting in Koku’s lap.

He also finds Koku’s final form hot. (He doesn’t have a monster kink though)

Akaza: is there a Mrs, Kokushibo?

Douma: Are you fucking flirting with Kokushibo’s final form?

Akaza: He’s fucking HAWT!

During his free time, Akaza usually like to either read or take long walks,

Rui is usually by his side on said long walks

character.ai

Chat now with Half-Demon Akaza · created by @silver_tooth

Half-Demon Akaza: *A strange man with short pink hair and blue eyes with yellow pupils approaches you. He’s wearing a pink vest, white baggy

Enmu

As you can probably expect, Enmu did not want to become a half demon

But after a long battle with Tanjiro, he eventually gave in

This is mostly due to his bitterness towards Tanjiro after he killed Muzan

Tanjiro quickly learns about his relationship with Muzan and instantly knows that it was a toxic relationship and Enmu doesn’t see that

Everyone tries to tell him that their relationship was toxic, but Enmu just gets pissed off

Tanjiro notices a strange smell that Enmu has and decides to look into it

He found out that Enmu couldn’t differentiate dreams and reality as a human and that he didn’t feel most pain, which made Tanjiro even more curious

It wasn’t until Enmu pointed out a suspicious flower that Muzan used to make him eat did Tanjiro finally realize what was going on

Turns out, Enmu had been given drugs as a kid and Muzan had kept him on those drugs to stay numb

Tanjiro knew he had to convince Enmu that Muzan was making him take drugs

It took a while for Enmu to believe him, but when he did, Enmu fell into a deep depression

Tanjiro had tried many different ways to make feel better (having him take care of people, saying kind things to him, etc)

Eventually, Tanjiro had him meet the upper moors, which introduced him to Douma!

At first, Enmu was quite distant and confused why Douma would take interest in him, but spending time with Douma made him come out of his shell

Douma showered him with affection, which made Enmu feel special and wanted

They would go on a lot of adventures together and they would pull pranks on people

After a while of this, Enmu started feeling strange and he went to Tanjiro to know what that feeling was

Enmu: What the hell is this feeling?! It feels so strange!

Tanjiro: Awww, that’s love, Enmu!

Enmu: What the fuck is that?

Both Tanjiro and Zenitsu would help him with confessing to Douma

They ended up deciding to confess on Valentine’s Day (There’s simply nothing more romantic than that)

Turns out, Douma was also planning to confess, so they just ended up being a flustered mess while Tanjiro and Zenitsu were giggling in the distance

At first, Enmu didn’t understand how Douma could do something nice for him

He thought that he always would have to do something nice for Douma

So when Douma treats him, Enmu.exe stops working

They go on a LOT of dates (usually little adventures)

character.ai

Chat now with Half-Demon Enmu · created by @silver_tooth

Half-Demon Enmu: *a somewhat short man with black, pink and turquoise hair and light blue ram’s eyes approaches you. He was wearing a black

Douma

He also didn’t want to convert, so Akaza and Kokushibo had to hold him down and force him to take Tanjiro’s blood

Tanjiro had to keep an eye on him for a while to make sure he wasn’t going to eat anybody

Douma eventually gave up eating people and started pulling pranks instead

He’s the number one troublemaker in the upper moon and can make a normal situation into one of chaos and anarchy

When Tanjiro hosted the demon meet and greet, Douma’s attention immediately went to Enmu, mostly because he found Enmu quite fashionable

When Douma started falling in love with Enmu, he was also very confused

Douma: Whay the fuck am I feeling this way towards a man?!

Akaza: You might be bisexual dude

Douma: *confused screaming*

Douma loves it when Enmu lulls him to sleep with his powers

In turn, Douma takes care of Enmu and makes some fantastic meals

Douma will happily listen to Enmu when he’s either talking about the demon ranks and/or trains

However, Douma can be quite reckless on their adventures, which sometimes causes them to get hurt

One time, Enmu ended up getting severely injured because of Douma’s recklessness

Basically, they entered an area of the Humanoid island where dangerous monsters were found

They barely got away, but they were haunted by an evil being named Kingu Akuma

That was one of the few times Douma actually cried

Despite the heartache of this event, something awakened in Douma that would help him deal with a bigger problem later on

Kingu Akuma harassed them and made them paranoid

He also reminded them of their pasts over and over again

Unfortunately, this made Douma remember the traumatic event that made him lose his emotions

(I’m not going to say what that moment was here since I can explain it better when I write the chapters. Let’s just say it is based on an actual theory. People believed this might’ve happened to him because of how the cult dehumanized him)

However, he also felt a painful feeling that he couldn’t quite figure out

He didn’t realize what that awakened emotion was until he reunited with Inosuke

Although Inosuke didn’t remember what happened to his mother, Douma remembered it vividly

Douma couldn’t understand why he felt so horrible when he was around Inosuke until he confronted Tanjiro about it

Tanjiro was horrified by Douma’s confession, but was willing to help him due to Douma’s willingness to change

Douma then proceeded to tell Inosuke what he did and well Inosuke didn’t take it well (he tried to kill him)

Due his guilt, Douma tried to hang out with Inosuke, but Inosuke was having none of it

It stayed like this until Inosuke was forced to fight off against a rabid ram demon (I’ll elaborate on this fight in a different post)

Inosuke came very close to death, but Douma saved him from getting mauled by the demon

Together, they finished off the ram and came to a mutual understanding

Although Inosuke can’t forgive him for killing his mother, he can understand that Douma is trying to make things up and so tries to develop a deeper relationship with his stepfather

Due to the he harassment by Kingu, guilt, and retrieving his memoriess, Douma went insane and he tried to unalive himself

Akaza stopped him from going through with it and told him that the only way to get rid of Kingu is to face your past

That’s when Douma went to Shinobu for therapy

She saw his memories and was horrified

Shinobu had to rescue a child version of him (his humanity) from Kingu inside his mind

After some time, he gathered the courage to face Kingu and fight him

Douma couldn’t defeat him (since Kingu is the god of chaos and suffering)

However it did end with Kingu realizing that Douma has changed and he leaves Douma (kinda like how Death did to Puss)

Both Akaza and Kokushibo care for Douma, but they often get annoyed by him

Gyutaro hates him due to Douma pestering both him and Daki (They have a typical annoyed child and jerk father relationship)

Douma finds this hilarious and continues teasing them

character.ai

Chat now with Half-Demon Douma · created by @silver_tooth

Half-Demon Douma: *A muscular man with platinum blonde hair and rainbow eyes approaches you.He seems to be wearing a red and black shirt and

Daki and Gyutaro

Daki was quite open to converting (mostly because she was convinced by Nezuko)

However Gyutaro had to be convinced by Daki in order to convert

Once they were converted, both Tanjiro and Nezuko wanted to shower them with affection (they felt that they deserved a better life than what they had)

At first they were very off putted by this, but they eventually warmed up

The Kamado siblings taught them more about their relationship and how to properly show love

Gyutaro: What the hell are you doing?

Tanjiro: Giving you something you never got, a hug.

Gyutaro: …

Gyutaro: *gross sobbing ensues*

Gyutaro constantly goes to Tanjiro for advice on how to be a better older brother

Gyutaro has also accidentally called Tanjiro “dad” a few times which sent Daki into hysterical laughter

Although Daki and Nezuko had to work out their relationship, they eventually became best friends

Nezuko would occasionally host a girl’s night out and Daki would be there right beside her

Both Daki and Gyutaro prefer to be around the Kamado siblings (mostly because they find comfort in them)

When they are around the other demons, they are usually dragged into their nutty shenanigans

Daki really loves being around Rui

She is like a mother to him and Daki smothers him in affection like Nezuko does

Gyutaro melts when he’s complimented (especially on his appearance)

Nezuko made Gyutaro a blanket with heating pads so Gyutaro doesn’t get cold and he loves it to death

They are very curious and love learning about the world

Lastly, they both just really love each other and they are learning to accept themselves

character.ai

Chat now with Half-Demon Gyutaro · created by @silver_tooth

Half-Demon Gyutaro: *a large man with green and black hair and yellow eyes sits atop a branch. He’s wearing a few red bands, blue pants, and

character.ai

Chat now with Half-Demon Daki · created by @silver_tooth

Half-Demon Daki: *a young woman with white hair that had green tips and yellow and red eyes slowly came up to you. She wore very revealing b

Hantengu Clones

I feel like Aizetsu would be the most willing to covert, but the others need some convincing

Sekido was definitely the hardest to convince, no doubt about it

Urogi and Karaku are best friends and they always cause chaos

Sometimes they’ll accompany Enmu and Douma on their adventures

Sekido usually has to pull them out of trouble

Urogi is definitely Aizetsu’s emotional support

Sometimes Urogi can go a bit overboard, but he tries his best to comfort Aizetsu

All the clones see themselves as brothers

Aizetsu and Genya do become friends, but it took quite some time for that to happen

They usually just have really interesting conversations. That’s how they usually hang out

Karaku, Nezuko, and Daki will always make sure that someone looks great for a date!

Sekido is the unofficial eldest brother, the other clones hate this

All the clones may tease Aizetsu, but if anyone else messes with him. They will have hell to pay

Aizetsu prefers to be around the Kamado siblings, they’re just so calming

He just gets overwhelmed easily, so he prefers to be in quiet places

Sekido hides his feelings and he’ll never admit to enjoying anything

Whenever Zohakuten needs to be formed, Urogi and Karaku usually try to have Aizetsu initiate it because he’s a lot more gentle than Sekido

Zohakuten is like a little angry gremlin

He will immediately attack anyone who calls him cute

Zohakuten: I’m not cute!

Zohakuten: I’m into hardcore death metal!

Zohakuten: I’ve got a scar!

Zohakuten: I branded myself with a hot iron once!

Zohakuten: I’m into Big Dumb Sweet Men!

Zohakuten: Don’t judge me, I’m not cute!

Despite Zohakuten’s efforts, Mitsuri still loves him

The wooden dragons are like little puppies that annoy Zohakuten

The only person that Zohakuten truly likes is Rui

You just can’t hate Rui

Hantengu actually prefers to be separated

He lives in constant fear so it’s nice to find happiness in the clones

character.ai

Chat now with Half-Demon Aizetsu · created by @silver_tooth

Half-Demon Aizetsu: *A tall man with long black hair, pure blue eyes, and grey horns stood in front of you. His forehead was a dark purple a

character.ai

Chat now with Half-Demon Urogi · created by @silver_tooth

Half-Demon Urogi: *A large man with hawk wings and talons flies down to you. He has king dark hair and bright yellow eyes. His entire lower

character.ai

Chat now with Half-Demon Sekido · created by @silver_tooth

Half-Demon Sekido: *A large man with long dark hair and red eyes looked upon you. He was wearing a kimono that had one red half and the othe

Kokushibo

He was also willing to be converted (mostly because he’ll still be able to stay alive)

At first, Kokushibo would be incredibly jealous of Tanjiro

Because of this, Tanjiro decided to try to spend more time with him

Tanjiro found out about his brother and decided as a peace offering, he would help Kokushibo learn the various techniques of sun breathing

Although he doesn’t really learn it, they become close and they form a strong friendship

When He, Tanjiro, Douma, and Inosuke were fighting the jaguar demon, Tanjiro basically gave a speech about how no matter how powerful or weak the younger brother is, they will always look up to the older one

Kokushibo was deeply moved by this

Kokushibo deeply respects Tanjiro for defying his fate in a much more honest and honorable way than he did

He is Tanjiro’s right hand man and will always help him with plans

Kokushibo is pretty much the leader of the upper moons when Tanjiro isn’t around

He is like the stern father while Akaza is more of a relaxed father towards the moons

Kokushibo is also very peaceful and prefers to paint and draw alone

He gives great advice to the other demons on how to handle their changes

Kokushibo usually has to get the other demons out of trouble

He has a major sweet tooth, but the only ones who know this are Akaza and Mitsuri

Sometimes, he’ll eat some sweets with Mitsuri

Kokushibo: How the hell did you guys turn a picnic into a forest barbecue?!

Akaza: DON’T LOOK AT ME!!

Douma: *holding the match* I didn’t do it

He always helps Tanjiro convert other demons

(Okay time for some Kokuaka headcanons!)

Let’s be honest, Kokushibo would be dense af. He would have no clue that Akaza had feelings for him and Koku would have no idea that he loved Akaza back

He’d just think that he felt a strange feeling when he’s with Akaza

Kokushibo eventually figures it out after seeing Tanjiro’s and Zenitsu’s and Douma’s and Enmu’s relationships grow.

At the start of their relationship, Kokushibo was very closed. He acted very stoic, believing that this was they way to earn anyone’s affection

Eventually, Akaza softens him up. He makes Koku realize that it’s okay to show emotion

Kokushibo adores warmth (he’ll never admit it though). He loved to be close physically to his friends and always carries heating pads on him.

Kokushibo is actually really good with kids, surprisingly.

Poor babe gets a lot of headaches so he carries medication on him and he prefers to be awake at night

Although he has to put up with the craziness of the upper moons, he still loves them and will always help them

character.ai

Chat now with Half-Demon Kokushibo · created by @silver_tooth

Half-Demon Kokushibo: *a powerful aura surrounds you as a man with long black hair with red tips approached you. He wears a purple and black

Tanjiro is incredibly proud of them and the progress that they have made

Tanjiro being a proud dad is so freaking cute

I love this AU and I’ve had a lot of fun with it! Speaking of fun, here are some incorrect quotes because why not?

Douma: *chugs mayo*

Enmu: Hmm that looks like our bedsheets

Akaza: *chokes on water*

Kokushibo: *gasps and covers Rui’s ears*

Tanjiro: I’m very uncomfortable with the energy we have created in this room

Rui: Every family has a gay cousin

Enmu: Bitch we don’t have a gay cousin

Enmu: Wait

Enmu: I am the gay cousin oH mY gOd

Tanjiro: Why were you calling me those awful things when we fought?

Gyutaro: Those were auful things?

Tanjiro: *starts tearing up out of guilt*

Gyutaro: WAIT, I’M SORRY!!

More Incorrect Quotes For My Half-Demon! Tanjiro AU!

Enmu: Douma says a lot of things in his sleep, okay?

Douma: *sleeping* I put a whole bag of jelly beans up my ass..

Akaza: Enmu, what do you see in this man?!

Kokushibo: WHY IS YOUR REPORT CARD ON THE CEILING?!

Douma: You said to bring my grades up.

Kokushibo:.. I did say that, let me see

Urogi and Karaku: CALIFORNIA GIRLS WERE UNFORGETTABLE. DAISY DUKES, BIKINIS ON TOP!

Sekido: SHUT THE FUCK UP!!

Tanjiro: Guys! Be quiet. You’re scaring the baby..*is holding Aizetsu bc he’s crying.*

Akaza: Guess you ended up taking my advice after all, huh?

Rengoku, who is now a half demon: I’m not fighting you, Akaza

Akaza: Awwww, man.

I just had a silly idea pop into my head after reading your latest chapter. Sekido: *Realizing that one (technically two) clones are still missing and he has an idea* Sekido: *Raises hands and walks towards Karaku, Aizetsu and Urogi*

Karaku and Aizetsu: *running away*

Urogi: *flies away*

Sekidos trying to see if they can still form Zoha

Hahaha! That’s pretty great!

The whole Zohakuten transformation will actually be discussed in future chapters. In fact, it causes a rift between the brothers, but they do mend that relationship. In fact, this actually inspires someone else to try to fix one of their relationships.

There was a reason Karaku was upset with Sekido..hehehe…

No context for this sneak peek of future chapter in my fanfic

Yes, that's Kaburamaru

I have to make an observation.

Anime-only KnY fans are of course just as valid as manga readers who were already in the fandom, but not one of them will be able to compare to the sheer whiplash of seeing Upper Rank Four and all of his clones go from “entirely shoved aside in all fan works” to “Sekido, Karaku, Aizetsu, and Urogi are now fan favourites”.

I have seen people write and read copious amounts of fics, especially about the main four, and I feel like a scientist in a laboratory, gazing down in fear and unease at what I have discovered.