Nezuko and Tanjiro

Nezuko's appearance

Nezuko is a young girl with fair skin, visibly large, prominent fangs, a slender build, and sharp, stiletto nails with a base color of light pink and ombre fading to a red-pinkish color at the end where they point. Her hair is long, black, and wavy. It reaches just below her waist, turning a flame-orange color as it passes her elbows, and appears to be crimped into large, straight ridges, worn side-swept drastically to her left. She has soft-looking, pale pink eyes that appear a lighter color around the rims of their irises and on the center a persian pink below the pupils; they slanted downwards toward the sides of her face and framed by notably long eyelashes. Her pupils appear as black slits as she transforms. In the manga, Nezuko can sometimes be shown with more than one bow. According to Tanjiro, Nezuko was known as a great beauty in their home town.[4]

She wears a light pink kimono with an asanoha (hemp leaf) pattern, the lining a paler pink layered with the white wavy yuban underneath as a medium-length trailing skirt kimono to freely move as a demon; this, the white clothes lowly cover her knees then goes down to almost her ankles making a open window, secured by a red and white-chequered hanhaba obi with an orange-threaded obijime and a green obiage. Over this, she sports a long, dark-brown haori that reaches her calves, as well as a pair of zōri with pink straps and white tabi socks, wrapped with thick pieces of black material resembling kyahan. Nezuko also wears a small pink ribbon on the left side of her head to keep her hair out of her face, along with the bamboo muzzle Giyu Tomioka gave her,[5] which is secured around her jaw with a strip of red cloth.

When Nezuko transforms into her awakened form during her fight with Daki, she has a bigger, taller, and more curvaceous body with longer hair that reaches to her feet. She loses her bamboo muzzle and footwear, as well as the sleeves of her kimono. She grows a short white horn on the right side of her forehead, designed with an irregular crack pattern, along with vein-like patterns in her forehead near her horn. She has a vein-like pattern around her left eye, but her most striking new feature is the red and green vine-like pattern that covers her skin, circling around her arms, legs, and chest, along with crack-like patterns around the rim of her irises.

As a human, she had a very similar appearance, the only differences being her lack of demon-like traits, fiery-coloured hair, and pale pink eyes. Instead, Nezuko had fully black hair, was tied back in three low buns, was decorated by pink ribbons, and had eyes of a darker pink color. She wore the same kimono, just without her haori and with a layered pink kimono with the white yuban underneath, along with a white Onbuhimo cloth tied around her, which she used to carry her little brother, Rokuta Kamado, on her back.[6] After becoming human again, these features return, with the exception of her hair, which seems to retain its flame-orange tips,[7] a feature that would be passed down to her descendant, Toko.

Nezuko's Personality:

Nezuko's original personality as a human was that of a kind and caring girl who thought of others before herself, much like her older brother, Tanjiro. Additionally, she was a responsible elder sister to her younger siblings and often put their needs before her own.[8][9] Nezuko is, however, not afraid to get in harm's way, protecting her friends from demons even after being returned to a human state. It is also shown that Nezuko's humane, laid-back demeanor supports this fact after Tanjiro apologizes to her.[10]

While Nezuko initially starts off like any other demon, bloodthirsty and hungry for human flesh, after seeing her brother's desire to protect her from being killed by a Demon Slayer despite her being a demon, she changes completely and becomes fiercely protective of him. Nezuko seems to have forgotten a good portion of her memories as a human, besides those related to her family, and thus doesn't retain the exact personality she had before transformation, instead acting akin to a child. She is still very caring and protective towards humans who she sees as members of her family, although this is mainly due to the influence Sakonji Urokodaki had on her while she was asleep for two years. Nezuko also retains some of her human emotions, as she has been seen to cry when sad and smile when happy, but in general, she appears more detached than her human cohorts, although she is still much calmer and less malicious than most demons. Nezuko also tends to see the images of her siblings in other humans, like Rokuta Kamado in Yushiro.

Since becoming a demon, Nezuko appears to have become rather brazen and does not seem to fear fighting; she fiercely guards her brother as well as her allies. She has also developed a strong willpower, which can be seen through her refusal to consume human flesh or blood, even in cases of extreme injury or exposure to human blood, which can be seen when she refuses Sanemi Shinazugawa after he attempts to lure her into biting him with his Marechi blood.[11] Her strong willpower remains even when she is no longer a demon, as shown when she willingly leaps in front of Inosuke to protect him from her own brother, who had become a demon and was attempting to kill those around him. Though she could have been killed, Nezuko did not hesitate to protect her brother.

On the rare occasion that Nezuko attempts speech, she has been seen to stutter a lot, which may be due to her bamboo mouthpiece, which is seldom removed, and the fact that she didn't speak for a number of years after her transformation. However, after developing resistance towards sunlight, which allows her to go outside and interact with others more often, her speech has shown signs of improvement, and she is able to fully pronounce words if someone else has just spoken them,[12] or hears them repeated frequently enough.[13]

It was later revealed by Tamayo that her missing memories and underdeveloped personality were due to her not being fully conscious, as she prioritized developing her resistance to the sun over regaining her consciousness.[14]

Abilities Overall Abilities of Nezuko:

Despite not being a member of the Twelve Kizuki, Nezuko is a very powerful demon. Her most prominent trait is her extraordinary growth rate, due to the high amount of blood she received from Muzan Kibutsuji when he turned Nezuko into a demon. This was shown in many battles where she could defeat her enemies despite being overwhelmed by them in the beginning. She has been shown to defeat her enemies by increasing her own physical capabilities, enhancing her regeneration, or developing her own Blood Demon Art in dire situations. Nezuko has displayed great combat proficiency and skill in battle, overpowering the Temple Demon, Swamp Demon, and Susamaru. Later on, her power further augmented to the point where she could fight against the likes of the Upper Ranks of the Twelve Kizuki, such as Daki, whom she easily managed to overpower despite initially being no match for her, and Hantengu's clones, who she could fight on equal grounds with.

Demon Abilities:

Abnormal Demon Physiology: Nezuko has several unique traits that set her apart from all other demons. Most notably, Nezuko can continuously restore her power without consuming any human blood, like any other demon would need to do. Instead, she recovers her strength through sleep alone, though she would have to spend a lot of time sleeping in order to recuperate and regain her power. Moreover, Nezuko has an extraordinary growth rate, as shown multiple times when she grows stronger without any training or consuming humans. This ability is shown to trigger even in the midst of battle and with huge power boosts. Her rapid growth in power was first displayed during her battle against Susamaru; though her foot was initially blown off by the Temari Demon's ball attack, upon regenerating, she was able to take the force of her attack and engage the demon in a back-and-forth skirmish that she was even able to come out of triumphant.

Advanced Demon Form: Nezuko has the ability to enter a berserk state where she becomes more demonic in appearance, transforming into an adult version of herself with vine-like tattoos that circle her body and a single horn protruding from her right forehead side. Nezuko's physical capabilities in this state are drastically increased to the point where she could sever Daki's limbs by stomping on them and kick her from extremely far distances, destroying multiple buildings in the process. Her regenerative abilities also become on par with those of the Upper Ranks of the Twelve Kizuki. When she first awakened this ability in her fight with Daki, she became frenzied in battle, lost her usual restraint to human blood, and only reverted back to normal when Tanjiro sang her a lullaby. She eventually became able to transform into her Advanced Demon Form while maintaining her usual composure and keeping herself from feeding on or attacking humans.

Sunlight Immunity: During her battle with Hantengu, she suddenly managed to develop immunity to sunlight, allowing her to be active regardless of whether she was in the sun or not.

Blood Control: In addition to her Blood Demon Art, Nezuko has shown in her Advanced Demon Form that she has control over her own blood's viscosity. When her limbs and head were severed and she was going to be attacked by Daki further, Nezuko managed to control her limbs and head by congealing and solidifying the blood spraying from them before the streams could break apart. She was able to command her limbs to grab and stop Daki's sashes, and, even though it was done with floating, severed limbs connected by blood, she was able to do it with such strength that the sashes were stopped dead in their tracks. She was then able to pull all of her limbs back together through those blood streams, allowing her body to regenerate.[15]

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 few moments to heal her wounds. However, once in her awakened state, her regeneration ability evolved to the point where it matched the caliber of the Upper Ranks of the Twelve Kizuki, allowing her to reconnect her whole torso and body parts as well as regrow her arms and legs instantly. Daki noted that Nezuko's regeneration surpassed her own.

Size Alteration: Upon being transformed into a demon, Nezuko displayed the basic ability to change and alter her body's size and height. She was able to shrink herself into the physical size of a small child in order to fit inside a small box or a basket, and she could also enlarge herself into a much bigger form.

Physical Abilities:

Immense Strength: Nezuko possesses naturally enhanced physical strength as a demon. Even after her recent transformation and with little sleep to recover, she was strong enough to decapitate the Temple Demon with a kick. Nezuko punched the Swamp Demon hard enough to cause him to cough blood and was capable of overwhelming the demon with powerful punches and kicks. As she has no previous combative experience, Nezuko relies on brute strength, using her legs as her main weapon to deliver fast and strong kicks. She has also been shown to increase her strength in battles during dire situations, like strengthening her legs to kick back Susamaru's handballs despite having her legs torn off by them earlier. Nezuko burning Aizetsu using her Blood Demon Art by sliding down his Yari. In her Advanced Demon Form, she could pierce through Daki's durable body with a single kick and was able to hold down her obi with her bare limbs; these same obi were powerful enough to wreak massive destruction across a city. In her battle against Upper Rank Four Hantengu, Nezuko was capable of attacking the demon's clones on equal grounds, kicking Karaku's mouth and partially severing his head, grappling with Aizetsu, and leaping high enough into the air to save Tanjiro Kamado when Zohakuten's giant dragons tried to crush him.

Fighting Style:

Skilled Hand-to-hand Combat: Despite having no known fighting experience prior to becoming a demon, Nezuko is a skilled brawler, make full use of her enhanced physical prowess. Her fighting style mainly revolves around the use of her powerful legs to deliver devastating blows and her sharp nails. Since transforming into a demon, she has been a major contributor to battles fought by Tanjiro, frequently assisting on the occasion that he is overwhelmed by an opponent.

Blood Demon Art:

Combustible Blood: Nezuko's Blood Demon Art allows her to combust her blood into pink-colored flames at will. Activating it required Nezuko to physically bleed from open wounds, inflicted by either demon opponents or herself via self-mutilation. Notable examples of the latter were when she ripped her arm off when wrestling with Karaku to splatter blood on him, and and slid herself down Aizetsu's yari when impaled to douse him. Her flames have a special property that makes them exclusively harmful to demons, objects belonging to demons, and Blood Demon Arts while being completely harmless to humans and other objects. These flames can hamper the regeneration of other demons. This is shown when Daki's burns took much longer to heal than traditional wounds, and the emotional manifesations of Hantengu had their regeneration stalled after being decapitated with a Bright Red Nichirin Sword ignited by Nezuko's blood, with Karaku wailing about the pain. Nezuko's Blood Demon Art was also able to neutralize Gyutaro's poison to save Inosuke Hashibira and Tengen Uzui from dying.[16] Her flames also have the ability to temporarily turn Nichirin Swords bright red, increasing the strength of attacks inflicted by them. A drawback to Nezuko's Blood Demon Art is that overuse of it can cause her to fall asleep.[17]