Why did Muzan was killing all the sun breath user in Demon Slayer?

Muzan hunted Sun Breathing users because he was traumatized and terrified by Yoriichi Tsugikuni, the original Sun Breathing master, who nearly killed him centuries ago. Muzan's goal was to eradicate this fighting style and its knowledge to prevent anyone from ever becoming strong enough to defeat him again, leading him to wipe out anyone who learned it from Yoriichi, including many Demon Slayers, resulting in the decline of the organization.

Why is Muzan scared of Sun Breathing?

Every time Muzan faces someone with Sun Breathing lineage, he becomes frantic, unstable, and terrified. The theory says Muzan is frightened because Sun Breathing resonates with a part of him connected to his original transformation — a memory he has suppressed for centuries.

Who did Muzan regret killing?

Muzan has always been a rational character, but fans believe killing his doctor is the only time he regretted taking a life.

Can Muzan be killed by Sun Breathing?

Yes, Sun Breathing, specifically the ultimate 13th Form, is designed to kill Muzan by attacking his twelve vital organs (seven hearts, five brains) in rapid succession, and while the legendary Yoriichi almost succeeded, Muzan survived due to his incredible regeneration and Tanjiro's final effort with Sun Breathing combined with the aging drug and sunlight, ultimately leading to Muzan's demise. 

Why did Muzan kill Nakime?

Muzan killed Nakime because Yushiro took control of her, allowing him to manipulate the Infinity Castle and use its space-bending powers against Muzan, putting the Demon King at a massive disadvantage in the final battle. To prevent Yushiro from using her abilities (like teleporting Muzan into sunlight or trapping slayers) and to focus on fighting the Demon Slayers himself, Muzan remotely crushed her head, ending her usefulness and silencing her. 

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Did all 9 Hashira die?

While many Hashira died in the fight, some survived: Giyu Tomioka, the Water Hashira, and Sanemi Shinazugawa, the Wind Hashira, both survive the final fight, carrying on the memory of their fallen comrades. Tanjiro also survives, and after the war, the Demon Slayer Corps disbands because demons are gone for good.

Who is Muzan most afraid of?

Muzan Kibutsuji fears Yoriichi Tsugikuni, the progenitor of Demon Slayers, above all else, a fear that extends to anyone resembling him, especially Tanjiro Kamado due to his Hanafuda earrings and Demon Slayer Mark, both tied to Yoriichi. Yoriichi nearly killed Muzan with his powerful Sun Breathing techniques, giving Muzan a deep-seated terror of death and the Sun Breathing style that has haunted him for centuries.
 

Who finally kills Muzan?

Muzan Kibutsuji is finally killed by the combined efforts of the Demon Slayers during the final battle, specifically by being exposed to sunlight after being critically wounded and immobilized by Tanjiro (who used the perfected Sun Breathing techniques inherited from Yoriichi) and other Hashira, with the sun ultimately burning him away, fulfilling the prophecy that sunlight is the only true way to destroy him. 

Who all knows Sun Breathing?

Sun Breathing, the original and strongest breathing style in Demon Slayer, was created by Yoriichi Tsugikuni, and its techniques were passed down through the Kamado family as the Hinokami Kagura (Dance of the Fire God), used by Tanjiro Kamado, his father Tanjuro, and ancestor Sumiyoshi. While Yoriichi taught others, most couldn't replicate it, leading to derived styles, making true Sun Breathing rare, with Tanjiro being the primary modern user.
 

Is upper rank 1 Tanjiro's dad?

No, Upper Rank One (Kokushibo) is not Tanjiro's father; Tanjiro's father is Tanjuro Kamado, but they share a distant ancestral connection through Yoriichi Tsugikuni, the creator of Sun Breathing, as Kokushibo was Yoriichi's jealous twin brother, and the Kamado family inherited Yoriichi's legacy. Tanjiro's father and Kokushibo look similar to Yoriichi (who looks like Tanjiro) because they descend from the same bloodline and culture.
 

Did Muzan cry when he died?

Muzan Kibutsuji didn't exactly "cry" tears of remorse when he died in the traditional sense, but he experienced extreme terror and desperation, ultimately becoming a monstrous infant form and crying out "Don't leave me!" as he faced oblivion from the sunrise, showing a primal fear of death he always had, not regret for his human victims, as revealed in Chapter 179 of the Demon Slayer manga.
 

Who is Muzan's wife?

Muzan Kibutsuji had several human "wives" for cover, with the most prominent being Rei (or Ry), whom he married for her wealth, eliminating her husband to integrate into her life and have a daughter, though their true fate remains ambiguous in the manga, with some fan theories suggesting they might have survived or been discarded. He used these relationships to hide in plain sight, and while they appeared normal, they served his demonic purposes, with some sources noting he'd had many wives before Rei who met grim ends.
 

Who is the 3 strongest Demon Slayer?

There's no single definitive answer for the "third strongest" Demon Slayer as rankings vary, but Gyomei Himejima (Stone Hashira) is consistently top-tier, with many fans placing him #1 or #2, making figures like Sanemi Shinazugawa (Wind Hashira), Giyuu Tomioka (Water Hashira), Muichiro Tokito (Mist Hashira), or Obanai Iguro (Snake Hashira) as strong contenders for the third spot after Gyomei and possibly Yoriichi Tsugikuni (legendary ancestor) or Demon King Tanjiro. 

Who is Muzan's favorite demon?

Muzan Kibutsuji has a few demons he showed favoritism towards, notably Rui (Lower Moon Five) for his similar backstory and potential, and Akaza (Upper Moon Three) for his power and loyalty (despite his aversion to eating women). Other favored demons include Nakime (for her useful ability) and Gyutaro (for his strength). Muzan's "favorites" were often based on usefulness, potential, or personality traits that pleased him, like Akaza's seriousness or Rui's desire for family, a twisted reflection of Muzan's own past.
 

Was Tanjiro a chosen sun breather?

Tanjiro stands out because he isn't some “chosen one” or descendant of greatness. He's just an ordinary boy who became extraordinary through sheer effort and willpower. Hard work > destiny 😊 His bloodline still inherits the Sun Breathing technique from Yoriichi.

Why did Muzan turn into a baby?

Muzan turned into a giant, demonic baby form at the end of Demon Slayer as a desperate, final attempt to survive the rising sun, using his shapeshifting powers to create a massive, fleshy mass that would burn slower, symbolizing his ultimate helplessness and the ironic return to a fragile, infant-like state despite his power, echoing his own past near-death experiences. This form was both a practical defense and a symbolic representation of his terror of death, reducing the Demon King to a helpless being clinging to life.
 

Who was the first sun breath user?

The first and original user of Sun Breathing (Hi no Kokyu) in Demon Slayer was Yoriichi Tsugikuni, a legendary demon slayer from the Sengoku era who created it as the first breathing style from which all others originated, later passing it down as the "Dance of the Fire God" (Hinokami Kagura) to the Kamado family, with Tanjiro being the first to master it as a breathing technique in centuries.
 

Can Tanjiro's dad do Sun Breathing?

The last user of Hinokami Kagura as a swordsman technique is Tanjiro Kamado, who learned the Breathing Style from his father Tanjuro Kamado, and would utilize it to fight various demons. Yoriichi demonstrates Sun Breathing.

What is Tanjiro's 11th form?

Eleventh Form: Dead Calm ( 拾 じゅう 壱 いち ノ 型 かた 凪 なぎ , Jū Ichi no kata: Nagi?) - The personal creation of the current Water Hashira, Giyu Tomioka. The user ceases all body movements and enters a state of complete tranquility, deflecting, blocking, and cutting any incoming attacks with imperceptible speed with their blade.

Who does Muzan regret killing?

He deeply resented the thought of spending the rest of his life avoiding sunlight, and it was only then that he truly regretted killing the doctor before the treatment had been completed. Upon researching the contents of the doctor's medicine, Muzan discovered it contained a rare component: the Blue Spider Lily.

What is Tanjiro's final rank?

At the end of Demon Slayer, Tanjiro officially reached the rank of Hinoe (丙), the third-highest rank in the Demon Slayer Corps, alongside Zenitsu and Inosuke; while he never officially became a Hashira (Pillar), his strength and feats against Upper Moons, especially Muzan, placed him at or above Hashira level, according to fanbook info and fan consensus. 

How old is Muzan?

Muzan Kibutsuji is chronologically over 1,000 years old, having been turned into a demon during Japan's Heian Period (around the 900s) while still appearing as a young man, but he biologically experienced extreme aging (around 9,000 years) during the final battle due to Tamayo's poison, making him effectively over 10,000 years old.
 

Is Muzan a nice guy?

Muzan is a cold-hearted, ruthless, intimidating, cruel and exceptionally intelligent psychopath. He sees no value in any humans he has encountered and shows little value in his own subordinates.

Did Muzan have a child?

Yes, Muzan Kibutsuji appeared to have a human wife and daughter in Season 1 of Demon Slayer, but this was a disguise: he killed the real husband and impersonated him to blend in, meaning the child was not biologically his, and their fate after Muzan's disappearance isn't detailed in the main canon, though he later uses a child form.
 

Who hates Tanjiro the most?

The characters who dislike Tanjiro the most in Demon Slayer are generally considered to be Obanai Iguro, the Serpent Hashira, and Sanemi Shinazugawa, the Wind Hashira, both due to his possession of Nezuko, but Obanai's disdain was particularly strong, fueled by jealousy and Tanjiro's perceived defiance during the Hashira meeting, though both eventually showed signs of grudging respect. Muzan Kibutsuji also hates Tanjiro as his primary nemesis for disrupting his plans and seeking revenge.