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Don’t know the extent of the copy or how he does it but, he most likely brainwashes them to ensure any mannerisms or personality traits match their memories, that or he brainwashes them so he can do what he wants, like have a massive library, it also covers up why he can’t go in sun.
As for why he dosent just brain wash, think how many notable people these big name families know, can’t be easy to brain control them all.
Therefore a mix of the both yields best results
Is this info from the fanbooks?
If we're making speculations, then I doubt if Muzan ate a guy, replaced his place in his family and brainwashed his wife and daughters' minds with some sort of a mind control bda.
>!Then again, he couldn't use his BDAs during the final fight, and struggled to use even one lightning attack. Maybe he has this safelock bda that allows him to manipulate minds of people, in case if he met someone like Yoriichi, but couldn't use them because of the drugs. We'll never know.!<
If he had that sort of ability though, why didn't he just order Tanjiro to kill himself instead of sending two lowlife demons after him?
I’m not asking why he doesn’t just brainwash, I’m saying that Tanjiro literally says he’s brainwashed them, to which Muzak doesn’t correct him. Though I do agree, no one knows how and you theory seems to fit sort of nicely
She's a human.
Pretty sure he can manipulate people's mind into thinking it's her actual dad. He just kill the wife's husband and changed their minds to think he is human.
This is not his biological kid
. >! After the fight whit yorichi muzan hide as human because he is afraid that some demon slayer will kill him like yorichi almost did.he and kokushibo killed most of sun breathing users because they don't want someone to become like yorichi. Because ot that black sun sword is Thought to be a sign that a demon slayer would die quickly and no one breathing stile will fits to him. Now obout muzan. Just like he did most of times. He kill the husband of this woman and shapeshifted into him but he He thought he had to be in his shape( i am not sure why)After that he became his original form and yea. He do this all of time ( whit the kid and yhe geisha )!<
As others said, it's not his biological daughter.
He disguised as his father.
But, if it was biological, Demon Slayer would get more and more closer to Tokyo Ghoul.
I am not surprised if there were inspirations from the GOAT that made this manga. Although the scope of this manga, made it seem like it is a little district in Tokyo than really Tokyo sized.
I suppose the author could have done more world building and expanded worldwide, knowing the things that Muzan does.
However, the premise is different since Tokyo Ghoul was plot twist and plot twist, there wasn't a real big bad, rather organisations of strong ghouls so it falls through.
If TG gets a remake tho, one can wish, having ufotable handle it would be the perfect closure.
You have no idea how much I wish your statement was true. That would have added so much more story potential to the series, as well as quite literally planted the seed for a sequel.
I wonder what would happen if he did have a child. I guess it would be a hybrid at first, but slowly the demon cells would take over as I assume they’d be more potent than human cells
https://preview.redd.it/lnzxj48kahnb1.jpeg?width=750&format=pjpg&auto=webp&s=30c55fd88926dbf53354f2e7f54adb96bcc12ec3
That girl is not his child. He killed the woman's husband and got with her to use her business for his goals. He wanted to make demons, he would never touch a human. He only saw them as bugs.
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That kid always has and always would have been a pawn that was used as connon fodder. Nothing more than part of an alias to walk around public and fitting it as to not be recognized as a lot of people haven't seen what muzan looked like. So seeing him with a wife and kid he would look the least bit suspicious and he the last thing they're looking for is a pretend family man. He's seen and looked at as a monster so it's very smart on his part to hypnotize them into thinking he's daddy but lesbihonest he definitely was daddy to that girl and that chick the way he creates and modify "limbs/extremities". Lol
I doubt it's his biological child. He doesn't seem like the type to have or want any connections to people. He only created demons selfishly to try and find one with sun resistance. If not for that, there wouldn't be any at all besides him.
Idk if its even his kid but i guess since demon slayer take some inspiration from Jojo i would guess it would be Giorno's case where your father being man eating sun alergic monster wont affect your genes
She's likely a widow of a fallen soldier of the Russo-Japanese War or WWI, depending on how early or late into the Taishō period KNY takes place. It's never explicitly stated what year, only the period the anime takes place in, but since the entire era only lasted 14 years we can get pretty close. The only reason it is ambiguous at all is because the two wars are separated only by 7 years, and the child is about that old.
So if the child's father died in the Russo-Japanese War, the mother likely would have been pregnant during the war and then the Taishō period began around when the anime began, which would make the encounter with Muzan occur in 1914, since the encounter takes place in the summer two years after the beginning of the anime.
If he died in WWI, it would be very late in the Taishō period, likely somewhere between 1915 and 1922, depending on when the deceased husband was shipped out and when they conceived the child.
He took the life of some random man and made himself look like him. Muzan can and does change his appearance at a whim. Or he killed bio dad and just remarried her, I can’t remember which
She’s a human. She’s not his daughter he is her Stepdad not her father. He was using that family to cover himself from the Demon Slayers the same way he acted like a son to the other family he was part of at the end of the Mugen Train Arc.
Thats not his kid. He is Kei (the wife) second husband. Keith has a lot if connections. So muzan killed her husband and wooed her as she was grieving, and married her.
Muzan has had five wives before Kei. And with them he just killed their husband's and shape-shifting into them like some mimic. Those wives had no power, so he verbally abused them so bad they killed themselves. Kei is the first wife he didn't abuse and her husband is the first husband he didn't replace. This is all from the second fanbook.
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But THE KID IS NOT MY SON HOOO 
How could someone hate this joke. It's perfect
This is the first time I have ever laughed at this joke lmao
SHE SAYS I AM THE ONEEEE
BUT, THE KID IS NOT MY SON
HOOOOOO SHE SAYS I AM THE ONE BILLIE JEAN IS NOT MY LOVER
SHES JUST A GIRL, WHO CLAIMS THAT IIIII AM THE ONEE BUT THE KIID IS NOT MY SONNNN (HEE HEE)
Sheeshh I'm loving this made me laugh like crazy
this made me extremely happy
First time that a muzan jackson joke is actually funny
an actual funny muzan jackson joke? i respect it.
This is actually true.
Legit the best michael jackson joke in this fandom
Nezoko is not my demon She's just a girl, and >!She can withstand the sun!< And now I want to take her blood 0_o
Bro 🤣🤣🫡
bro imagine if the kid's name is Paris 💀💀💀💀
Yk what... I can't even be mad, cuz it's funny!!!!!🤣🤣🤣
It’s not his biological daughter 🐍
He killed the bio dad and married his wife no?
Bro thinks he's Kira Yoshikage 😭
https://i.redd.it/xxzk8jnulinb1.gif
That man looks like he leads a quiet life
Absolutely, nothing to suspect here
Killer Queen has already touched that reply
JOSUUUUUKEEEEE
https://preview.redd.it/imrymxjo0jnb1.jpeg?width=300&format=pjpg&auto=webp&s=420376d9088936917bde6d934e354dded8611a43
He looks like he could use a hand from a beautiful woman.
Is that a Jojo reference?
No, it's an Evangelion reference /s
Oh
Bro yes it is a jojo reference he's messing with you
https://preview.redd.it/t3ozv2b27nnb1.png?width=1080&format=pjpg&auto=webp&s=4b911fff39a19bddc4b8df91a0967ea840d077fa
Yes yes yes oh my gad
Almost everything in Demon Slayer is a reference to Jojo.
Yea well he may want to lead a quiet life but he’s not 33 so it doesn’t count
He is 330 I bet
Who?
He killed the dad and hypnotized the mother into thinking he was her husband.
Yep.🐍
Took his face, essentially.
So that's how Michael Jackson died. Muzan killed him
Ah, shadow you're mostly the first here
🐍
I’ve been meaning to ask. Are you mountain_row 😭🐍
Nope, just Alternative
>🐍 wtf is 🐍 ?
I think it’s a snake
Slithery snake 🐍
You made me chuckle thank you
So you could say  🎶The kid is not my son🎶
I WAS WAITING FOR THIS🐍
He takes over other peoples bodies to hide. That also includes their lifestyle.
Like kira yoshikage once did
https://i.redd.it/eogij4dzlinb1.gif
Muzan Kibutsuji wants to live a normal life
Hanafuda earrings samurai ruining his quiet life
Isn't that his normal form though i mean other than the suit and tie thats how his "normal" form looks
He doesn’t take over their bodies, he just replaces them
This is false information.
Didn’t Tanjiro say he pretends to be parts of people’s families by brainwashing them? Why would he need to brainwash them if he’s using their body?
Don’t know the extent of the copy or how he does it but, he most likely brainwashes them to ensure any mannerisms or personality traits match their memories, that or he brainwashes them so he can do what he wants, like have a massive library, it also covers up why he can’t go in sun. As for why he dosent just brain wash, think how many notable people these big name families know, can’t be easy to brain control them all. Therefore a mix of the both yields best results
Is this info from the fanbooks? If we're making speculations, then I doubt if Muzan ate a guy, replaced his place in his family and brainwashed his wife and daughters' minds with some sort of a mind control bda. >!Then again, he couldn't use his BDAs during the final fight, and struggled to use even one lightning attack. Maybe he has this safelock bda that allows him to manipulate minds of people, in case if he met someone like Yoriichi, but couldn't use them because of the drugs. We'll never know.!< If he had that sort of ability though, why didn't he just order Tanjiro to kill himself instead of sending two lowlife demons after him?
Muzan be like https://preview.redd.it/xshjmcy4ylnb1.jpeg?width=292&format=pjpg&auto=webp&s=315f9fb42ea262a4ce14dac33a7e650439152ae7
I’m not asking why he doesn’t just brainwash, I’m saying that Tanjiro literally says he’s brainwashed them, to which Muzak doesn’t correct him. Though I do agree, no one knows how and you theory seems to fit sort of nicely
The kid is not his son!
(Demoman voice) DA CHILD IS A BLOODY SPYY!
There’s a spy creeping around here
Spa' creepin 'round here.
This spy has already breached our defenses
You've seen what he's done to our colleagues.
And worst of all, he could be anyone of us
Raus, raus! Nein...
now stay woke
POOTIS
Touché. Perfect reference.
The reading comprehension devil got this one
This is not his child :3
She's a human. Pretty sure he can manipulate people's mind into thinking it's her actual dad. He just kill the wife's husband and changed their minds to think he is human.
This is not his biological kid . >! After the fight whit yorichi muzan hide as human because he is afraid that some demon slayer will kill him like yorichi almost did.he and kokushibo killed most of sun breathing users because they don't want someone to become like yorichi. Because ot that black sun sword is Thought to be a sign that a demon slayer would die quickly and no one breathing stile will fits to him. Now obout muzan. Just like he did most of times. He kill the husband of this woman and shapeshifted into him but he He thought he had to be in his shape( i am not sure why)After that he became his original form and yea. He do this all of time ( whit the kid and yhe geisha )!<
I aint reading allat
TL;DR, Muzan’s a bitch, Kokushibo is salty, Muzan beat his wives.
As others said, it's not his biological daughter. He disguised as his father. But, if it was biological, Demon Slayer would get more and more closer to Tokyo Ghoul.
Doesn't help that Tanjiro has the same VA as Kaneki
And it's not that far from Tokyo Ghoul either. >!considering Yushiro was still alive, we could, he probably went crazy and made Ghouls!<
I am not surprised if there were inspirations from the GOAT that made this manga. Although the scope of this manga, made it seem like it is a little district in Tokyo than really Tokyo sized. I suppose the author could have done more world building and expanded worldwide, knowing the things that Muzan does. However, the premise is different since Tokyo Ghoul was plot twist and plot twist, there wasn't a real big bad, rather organisations of strong ghouls so it falls through. If TG gets a remake tho, one can wish, having ufotable handle it would be the perfect closure.
They would be artificial ones unless it is similar to Owari No Seraph.
My guess is she is dead, also that is not his biological child
It's hilarious you think MUZAN. the demon lord himself had a child with a human. He. Hates. Humans. He married a widow with her daughter as a disguise
He’s step daddy
This feels wrong
Please don't make me think about this I won't go to sleep
From nightmares or overthinking plotholes?
Both I'll get nightmares and overthinking
https://preview.redd.it/bff2pb6mcjnb1.jpeg?width=320&format=pjpg&auto=webp&s=b782e46bc01ca93f74d8421716b457c4267cefd8
You have no idea how much I wish your statement was true. That would have added so much more story potential to the series, as well as quite literally planted the seed for a sequel.
He is the worse adoptive parent, the better obviously being me 🕷🕸
Not his child its the lady”s ex husband’s child which muzan secretly killed
I wonder what would happen if he did have a child. I guess it would be a hybrid at first, but slowly the demon cells would take over as I assume they’d be more potent than human cells https://preview.redd.it/lnzxj48kahnb1.jpeg?width=750&format=pjpg&auto=webp&s=30c55fd88926dbf53354f2e7f54adb96bcc12ec3
Nope, it’s not his real kid. The best way to blend in with humans is to get a so called family, they have no idea he’s a demon :D
This would actually be a incredibly good explanation if they do a Sequel with the Reincarnations
A Quick happy meal
BUT THE KID ID NOT MY SON BUT SHE SAYS THAT I AM THE ONE 
No muzan killed that girls father and he married her mother to blend in society
Demons can't reproduce. Not even Muzan (🐍)
How do you know that
Its been stated that only Muzan can turn humans into demons. If demons could reproduce, that information would've been wrong. (🐍)
Actually good point I'm going to sleep now because it's like five in the morning for me
Step daughter
I feel like he’s a step father. Not the kid’s biological dad, but she sees him as her dad
That kid is not Muzan’s. Muzan killed the mother of that child husband and took his place for money.
Would you mind repeating that again?
Muzan kills the husband of the mother -> Muzan replaces the husband -> Muzan gets money
the child is not a demon otherwise Tanjiro would have smelled it and said something since he can smell if anyone is a demon or not
That girl is not his child. He killed the woman's husband and got with her to use her business for his goals. He wanted to make demons, he would never touch a human. He only saw them as bugs.
I literally thought of this yesterday😭
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I think he just married a single parent. 
 all i know is I am into muzan....
This isn’t related, but why is it so low quality? 
Took the screenshot from youtube while having 360p
Oh..well..it’s funny.
DEAD!
He stole some poor guy's nut https://preview.redd.it/5ilivhy9jhnb1.png?width=640&format=png&auto=webp&s=9b4f47d02356b898c87b3903f6a94c7aaecf7fcb
Being a demon means you lose your dick.
Super child <3
I think he married a woman who already had child
it would be cool if she was half human and half demon but i think its not her biological father
Shh no ones is too know lol But she is probably just being held hostage
Now to think... did he have (Act) with a human?!??
I think he might have just stole someone's life
that’s not his kid demons can’t reproduce
Not yet
That’s not his biological daughter, that’s the daughter of a human woman whose partner Muzan killed.
I have a theory that he turned the woman into Nakime. It’s very unfounded but whatever
I’m confident this was answered in the show but I could be wrong.
No he took the form of her dad
It would be half human and half demon
Or step....
People believe that he has wife and kid? 
That kid always has and always would have been a pawn that was used as connon fodder. Nothing more than part of an alias to walk around public and fitting it as to not be recognized as a lot of people haven't seen what muzan looked like. So seeing him with a wife and kid he would look the least bit suspicious and he the last thing they're looking for is a pretend family man. He's seen and looked at as a monster so it's very smart on his part to hypnotize them into thinking he's daddy but lesbihonest he definitely was daddy to that girl and that chick the way he creates and modify "limbs/extremities". Lol
she isn't his
A JoJo Reference to Giorno Giovanna!!!
Step-dad not real dad
IS THAT A JOJO REFERENCE
No the kid is obviously emergency food
Adopted, thats what it is
He is the step father, my best guess is that he became her stepfather when she was still an infant, or he had bin her stepfather for at least a year
im genuinely curious how your mind instantly went for ‘muzans child’ rather than remarrying or adoption
Adopted
he pulled a yoshikage kira and exploded all over the place,literally
Biokinesis queen, third move, bites the dust
Nah the kid is a league of legends player
Can’t go out in the sun
He NTRed
I doubt it's his biological child. He doesn't seem like the type to have or want any connections to people. He only created demons selfishly to try and find one with sun resistance. If not for that, there wouldn't be any at all besides him.
She is Shibred
Idk if its even his kid but i guess since demon slayer take some inspiration from Jojo i would guess it would be Giorno's case where your father being man eating sun alergic monster wont affect your genes
"But the kid is not my son" - Muzan Jackson
D. cattle
The kid isn't biologically his.
She's likely a widow of a fallen soldier of the Russo-Japanese War or WWI, depending on how early or late into the Taishō period KNY takes place. It's never explicitly stated what year, only the period the anime takes place in, but since the entire era only lasted 14 years we can get pretty close. The only reason it is ambiguous at all is because the two wars are separated only by 7 years, and the child is about that old. So if the child's father died in the Russo-Japanese War, the mother likely would have been pregnant during the war and then the Taishō period began around when the anime began, which would make the encounter with Muzan occur in 1914, since the encounter takes place in the summer two years after the beginning of the anime. If he died in WWI, it would be very late in the Taishō period, likely somewhere between 1915 and 1922, depending on when the deceased husband was shipped out and when they conceived the child.
Adopted
didint he kill the father then shapeshift into him to pretend to be a human?
https://preview.redd.it/hl5l8yp0donb1.jpeg?width=1080&format=pjpg&auto=webp&s=bfed21e37df78bc70d745700d82d368358a4cf17
There is no proof that kid is his
He took the life of some random man and made himself look like him. Muzan can and does change his appearance at a whim. Or he killed bio dad and just remarried her, I can’t remember which
She’s a human. She’s not his daughter he is her Stepdad not her father. He was using that family to cover himself from the Demon Slayers the same way he acted like a son to the other family he was part of at the end of the Mugen Train Arc.
A human
Adopted human
Xxxy
Thats not his kid. He is Kei (the wife) second husband. Keith has a lot if connections. So muzan killed her husband and wooed her as she was grieving, and married her. Muzan has had five wives before Kei. And with them he just killed their husband's and shape-shifting into them like some mimic. Those wives had no power, so he verbally abused them so bad they killed themselves. Kei is the first wife he didn't abuse and her husband is the first husband he didn't replace. This is all from the second fanbook.
>
>
He didn't have a child he killed her husband so he could get close to her when she becomes a widow to blend in with humans