reason why Nezuko can't heal him because his illness is . not based on some demons blood demon. art. It's actually a curse the Ubuyashiki family is stricken with because Muzan.
Nezuko first unlocked Exploding Blood during Tanjiro's fight with Lower Rank Kizuki Rui, and it has the power to turn her blood into a fire that burns demons, and only demons. Thanks to that, Nezuko was able to burn away the poison inside of Inosuke and Tengen without hurting them any more than they already were.
Immense Regeneration: As a demon, Nezuko has enhanced regenerative abilities that allow her to heal in the blink of an eye. When she first became a demon, her regeneration was relatively slow compared to other demons, taking a while to heal slash wounds.
Nezuko heals Inosuke by setting him on fire. The siblings rush over to him and Tanjiro attempts to wake Inosuke up, but to his dismay he feels his heart get weaker.
Would Nezuko be a upper moon? Nezuko is at least stronger than Daki, meaning that if Muzan could bring her back under his control, she would certainly qualify for the most prestigious title a demon can hold: a member of the Twelve Kizuki. Thanks to Nezuko's remarkable strength, she would have to be an Upper-Moon.
She was ranked in 3rd place in the first Demon Slayer character popularity poll with 3,319 votes. IGN regarded Nezuko as one of the series's most popular characters and noted how her design elaborates the way she sees humans as good people as a result of hypnosis.
Nezuko isn't like other demons, which is how she was given the name "The Chosen Demon." The reason behind this is because unlike other demons, she can actually walk in the sunlight without getting burned.
He was in a deep slumber and Nezuko wanted to wake her brother up. She decided to use her Blood Demon Art after failing to wake him up by nudging him. The animation of the flames that healed Tengen Uzui, Tanjiro Kamado and Inosuke Hashibira resembled her Blood Demon Art that was showcased during the fight against Uzui.
His training also made him extremely pain tolerant and poison resistant, which saved him from Gyutaro's poison and allowed him to fight despite suffering numerous injuries and losing his hand.
Is Nezuko cured in Demon Slayer? Fortunately, Demon Slayer fans who have read the manga know that Tamayo's medicines cure Nezuko towards the end of the series.
Nezuko, on the other hand, never was under Muzan's curse, it would seem. Instead, she used her will to protect her brother and other humans to fight off the curse. This is probably why Nezuko sleeps instead of eating humans. This also means her strength as a demon is based on her will to protect rather than feed.
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.
Nezuko broke her ties to muzan by not eating ppl. So muzan has no curse to abuse. This wasn't explained in the anime, but Nezuko was able to remove the curse of Muzan on her own way, just like what Tamayo (Demon doctor) did. This was when Tanjirou and co.
In conclusion, Nezuko cannot beat Akaza in Demon Slayer. In terms of power, physical abilities, regeneration rate and overall combat ability, Akaza is far superior compared to Nezuko.
Nezuko was only able to survive because Kibutsuji had transformed her into a demon. Unfortunately this meant Nezuko had a strong craving for human blood and initially attacked Tanjiro.
Unlike other demons who survive on blood, Nezuko never really needs it, and she doesn't even consume human food either. Moreover, Nezuko has never shown any signs of undernourishment as she is always ready to assist her brother with her overwhelming strength and deadly Blood Demon Art.
As a result, Tengen Uzui has to deal with the moniker of being the least powerful Hashira around. Of course, that's not the worst thing in the world, as all Hashira are strong. He's still incredibly powerful and can give any demon a run for their money.
Sound Hashira
He is the fastest Hashira, and the second physically strongest. Obviously, then, Tengen Uzui is rather proud. He is demanding, fussy, boastful, and prone to selfishness. But he is also ultimately kind and caring, with great love for his three wives as well as the other Hashira.
5/10 Did Not: Tengen Uzui Retired Before Getting His Mark
The Hashira began obtaining their marks after the Upper Moons appeared in the Swordsmith village, an event that occurs immediately after the Entertainment District Arc that Tengen battles in. After his fight against Daki and Gyutaro, Tengen had to retire.
Giyu is one of the legendary Hashira, and he's brought down demons far more powerful than Nezuko. With his level of skill and impressive agility, he'd easily defeat Tanjiro's little sister.
Following the completion of their mission, Tengen finally acknowledges Tanjiro's abilities by telling Obanai that he "has grown to become strong enough" to fill his vacancy as he retires.
However before she can cut Nezuko's head, Daki is still smashed into the ground by Nezuko's kick. Daki is shocked as Nezuko's leg pierces through her body, pinning her into the ground.
Zenitsu Agatsuma
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.
There is no logical reason in relation to the plot that suggests why she has a horn. While fans might assume the horn grows on people with some relation to the sun, this wasn't the case for Tanjiro, who also turned into a demon. The only other reason that could explain the horn's existence is purely aesthetic.