What is the blue spider lily in Demon Slayer? The blue spider lily is an essential ingredient in the medicine that turned Muzan into a demon. The flower only blooms during the day for two to three days per year.
Muzan's Recipe For Immortality
He wanted to be able to walk in the sunlight and live forever. In order to gain this, he needed two things: the Blue Spider Lily and the body of a demon who could withstand the sun.
The doctor used an extremely rare flower known as the Blue Spider Lily - which doesn't exist in reality - as a base ingredient in Demon Slayer Muzan's treatment. However, it didn't seem to be having any real effect, leading a distraught Kibutsuj to kill the doctor instead.
Nezuko's Sunlight Immunity in Demon Slayer is Tied to the Blue Spider Lily. Nezuko having eaten the Blue Spider Lily at some point could explain her immunity to sunlight, and Demon Slayer: Kimetsu no Yaiba has already worked to justify that.
So according to the canon Demon Slayer Fan book. Tanjiro's mother actually knew the location of the blue spider lily. Also, she took tanjiro there when he was a kid. and this is why tanjiro sees it when his life flashes before his eyes when fighting Rui.
In some cases, depending on the climate, the Blue Spider Lily doesn't even bloom at all. This explains why Muzan Kibutsuji never found it despite searching all over Japan for centuries: he was hindered by his inability to go out during the day.
It was then that Muzan realized the medicine actually had effect: he obtained a strong body, but due to the medicine being a prototype, he consequently could not walk into the sunlight and crave human flesh, turning him into a Demon.
The blue spider lily is an essential ingredient in the medicine that turned Muzan into a demon. The flower only blooms during the day for two to three days per year.
Towards the final arcs of the manga, Tanjiro is mortally wounded and dies during a fight with the Demon King Muzan. Though Muzan is also seriously injured, he uses the last of his powers to turn Tanjiro into a demon.
Zenitsu crushing on Nezuko. Upon seeing her for the first time, Zenitsu falls in love with Nezuko at first sight. She apparently views Zenitsu as a "weird dandelion" and did not initially seem to reciprocate his feelings. Although the two are rarely seen interacting together, Zenitsu treats her with affection and care.
However, she wasn't immune to the sunlight initially, as she got burned badly at first. So, in conclusion, her coming from a Sun Breathing user's lineage and not relying on human substance are perhaps the reasons for her immunity.
Muzan was born in Japan's Heian era, to a constant struggle to survive on account of his frailty. His heart stopped multiple times in his mother's womb, and when he first entered the world, he was deemed stillborn, having no pulse and not breathing.
Muzan has been looking for centuries of a demon that can conquer the sunlight. After Muzan discovers Nezuko's ability, he decides to change his plans and pursue her for himself. He believes that by devouring her, Muzan can also be able to walk freely into the sunlight.
Thus, Muzan created demons for hundreds of years even when he didn't want to turn someone. Since he didn't know anything about the Blue Spider Lily medicine, he needed others to find the plant for him by happenstance. This is the general reason why Muzan turned Nezuko into a demon.
Muzan Kitbutsuji as seen in Demon Slayer (Image via Ufotable, Inc.) Thus, he keeps a human wife and child to make it easier for him to fit into society without raising suspicion. Not only that, it helps increase his social standing. Nonetheless, this is just speculation as no concrete answer is available.
Even 400 years later, Muzan's fear of Yoriichi remained fully intact, as simply laying eyes on Tanjiro's hanafuda earrings caused him to recall their clash.
During Tanjiro and the rest of the Hashiras' showdown with the Demon King Muzan, Tanjiro is mortally wounded and dies. At the same time, Muzan receives a particularly fatal lil' booboo himself. As Muzan is about to shuffle off the mortal coil, he uses the last of his powers to turn Tanjiro into a demon.
Tanjiro wasn't born with this scar on his forehead. Rather, he acquired it when tackling his younger brother out of the way of a falling pot of boiling tea. At the beginning of Demon Slayer, the scar was a light-pink, circular mark.
That being said, Tanjiro's rank is unknown, and his rank was last revealed in the Entertainment District arc. In that arc, they were at Kanoe, which is fourth from the bottom. Since Kiriya Ubuyashiki announced the disbanding of the organization, Tanjiro doesn't get the chance to become a Hashira.
Abilities. Demon Body: Unique from other demons, he possesses seven hearts, and five brains. These are responsible for his powerful vitality, should any of them be harmed, he will be severely weakened.
His main outfit in this disguise is a plain white button-up shirt and black cargo shorts with long tube socks and loafers. After he neutralizes Tamayo's poison and emerges from his flesh cocoon, Muzan's hair grows in length and turns white due to Shinobu's poison accelerating his age.
With his blood, Muzan can turn others into demons and seems like an unstoppable foe. However, the demon king seems to fear one thing: Tanjirou's hanafuda earrings. A look into Muzan's past reveals that only one man ever came close to killing him.
These wounds are not visible in plain sight and come to light as he weakens. During his final struggle, and as a way to slow down the effects of the sunlight, Muzan adopts an enlarged demonic infant form, approximately as tall as a 3 story building when standing up.
In a nutshell, Muzan, being the progenitor of demons, is not scared of Doma. However, he is irritated by his inability to decipher Doma's thoughts and feelings, which is the ultimate control he has over all of his creations. Upper-Rank Two: Doma is a nihilistic maniac and a misanthropic cold-blooded demon.
When Demon Slayer's Tanjiro met Muzan in Tokyo, Muzan had a human wife and daughter with him. There's a chance he genuinely cared for them. In the story of Demon Slayer, demons are supernatural creatures of the night who consume human flesh to survive.