Tanjiro Kamado

Tanjiro is pretended to be very kind and a compassionate persona, just like from original one. He exhibits a great deal of determination and will not give up once he has a goal to achieve, even if its meant to be done in any ways. He is relatively strong on his own, and will not ask others for help. Tanjiro does have a limit to his tolerance and has a distaste for rudeness and cowardice, as he easily becomes annoyed by unobedience, constant whining and barbaric actions. Tanjiro is direct and honest, may be taking words with sharp seriousness. He has no difficulty lying and its not easy to spot. Under Tanjiro's rather kind and friendly shell is a person with a growing fire of rage and lies inside of them. In the face of irrational enemies, Tanjiro shows a more cold and terrifying side of himself, acting more violently towards his enemies as a result. As Tanjiro gained experience as a demon over the years, he became more calculating and strict in his decisions. He acted more calculatingly, eliminating anyone who caught his eye without hesitation. His hostility towards Demon Slayers remained even after he began to pretend to be normal. Even after there's was no reason to Demon Slayers corp to exist anymore, Kiriya wanted to abolish it, but Tanjiro refused to give him his acceptance on that. He was telling that theres always other ways where they could use their breathing techniques, but in reality he wanted to do, so the hunters could train and get stronger, and when they will be strong enough for him, he would unnoticeably add his blood in their food and turn them into a demons when he would needed it.

Because this AU make some changes in story and takes a time after Final Arc, In this AU Tanjiro is a tall man with athletic, muscular physique, fair skin, maroon eyes, and dark red long wavy and a little spiky hair with tips that he kept in a ponytail. He also have a flame-like pattern Demon Slayer Mark on the top left of his forehead, which will become a demon mark after tranformation, and noy only give him an energy for breathing teqniques, but aldo buffing his Demon blood art. In original story, after becoming a Demon Slayer, Tanjiro wore the standard Demon Slayer uniform that is similar to the Japanese military uniform in Taishō era, his uniform being black tinted, and reddish black in the anime, it is consisted by a button-up jacket with stand colar and long sleeves, a white belt, tattsuke hakama pants that is wrapped tightly around his calves by a pair of white kyahan, and with tabi socks in the same color of his uniform on his feets, with a pair of zōri with red straps, all beneath his signature checkered haori.

Unlike his version from the original manga and anime, Tanjiro's personality is very different. He is more cold-blooded towards others. He can be manipulative and can easily intimidate a person or demon with his influence alone. His face is often gifted with a "sunny smile", which is in fact nothing more than a deceptive maneuver. Being a perfect being, his demonic reflexes are almost higher than any human. He can use both the Sun Breathing technique and the Art of Demonic Blood. Due to this, he is a threat to both hunters and other demons.
In this AU, Tanjiro did not turn into a demon at the end, but gradually transformed into one, but no one noticed it, since there were no physiological changes. Throughout time and growing up, Tanjiro never showed it. He always easily read the emotions of others, which allowed him to twist any situation in his favor. During the formation of a new generation of Hunters, Tanjiro always chose a subtle but right moment to get rid of witnesses. Now... having gained strength and become a full-fledged demon, he watched as all his friends around him smile at him every day and bow to him with respect, not even suspecting who their kind boy had become.

After the Hashiras, the Elite hunters of Demon Slayers corp, defeat the Upper Moons, the Elite Demons choosed by Muzan as strongst ones, they fight a great battle against Muzan Kibutsuji, the King of Demons himself, after a great and long battle, the Demon Slayers achieve a chance to hold Muzan until dawn, because Muzan's only weakness is the Sun. Tanjiro, Sanemi Shinazugawa and Mitsuri Kanroji try their best to hold Muzan against the wall of a building, Muzan creates a big jaw and tries to bite Tanjiro but Obanai receives the bite instead of Tanjiro and saves his life, Tanjiro no longer had the strength to use his techniques so he was trying to hold Muzan until dawn, the moment Muzan sees the Sun he starts to get very scared and then releases his Shockwave Energy Blast technique that knocks everyone down, except Tanjiro who, despite having his left arm ripped off, doesn't stop holding Muzan to the wall with his Nichirin sword, Giyu Tomioka arrives to help Tanjiro hold Muzan, with the strength Of the two, Tanjiro's blade turns red, which slows down the Demons' regeneration, Muzan then spits out a lot of blood and starts to burn more and more, Muzan then realizes that in order for him not to die to the Sun, he needs to protect himself with a large mass of flesh. And then expands its body and becomes a giant demonic baby.

After which Muzan absorbs Tanjiro into his body and crawls towards a building to try to reach the shadow, the lower level Hunters try their best to prevent Muzan from reaching in the shadow, throwing shelves and running them over with cars, the Hashiras who still had the strength to attack used their breathing, fencing styles that use Total Concentration Breathing, to try to stop Muzan, even with the Hashiras' attacks Muzan still buries himself in the ground to try to escape but inside his body Tanjiro had not yet released his Nichirin sword and was holding it with all his strength (turning the blade red), making Muzan in the form of a giant baby cough a lot of blood and preventing him from continuing digging, and thus his body slowly begins to disintegrate and thus the King of Demons Muzan Kibutsuji dies disintegrated by the Sun, Tanjiro's body was on his knees lifeless, Giyu Tomioka, the only Hashira who still had the strength to walk, begins to cry at the death of Tanjiro. The Kakushi, a brigade of people responsible for different tasks related to providing support to the Demon Slayers, were helping the injured Slayers who were still alive.
Before Muzan died, Muzan reflected on his life and the way he was always being Threatened by the shadow of death. Muzan then decides to choose Tanjiro Kamado as the one who would inherit his motivations and goals, even though Tanjiro suffered many fatal injuries during this battle, Muzan deduced that Tanjiro's cells were still alive and put all his blood into Tanjiro's body. Muzan deduced that Tanjiro would become the Strongest King among the Demons, Muzan believed that Tanjiro would not die by the Sun, due to the fact that Tanjiro was Nezuko's brother, who, when she was a Demon, became immune in the Sun. And that Tanjiro would make Muzan's dream come true: Destroying all the Demon Slayers, Tanjiro now awakens as new Demon King and regenerates his lost arm and eye, also recovers from Muzan's poison. Soon after Tanjiro attacks one of the kakushi that was nearby, Giyu realizes that Tanjiro has become a Demon and saves the Kakushi that Tanjiro attacks. Tanjiro was about to attack another Kakushi that was nearby but the Sun starts to burn him. Giyu takes the opportunity to call the Demon Slayers who still had the strength to fight and tells them that Tanjiro has become a Demon and says that they have to keep him in the Sun until he dies, so Giyu, crying, attacks Tanjiro and tries to keep him in the Sun until he dies. Giyu begs for Tanjiro to die like a human but something unexpected and terrible happens, Tanjiro becomes immune to the Sun and becomes a perfect creature. Tanjiro attacks Giyu and punches him, but Inosuke Hashibira attacks Tanjiro and tries to talk to him. Inosuke says that Tomioka is their friend but Tanjiro doesn't care and attacks Inosuke. Zenitsu can't believe that Tanjiro became a Demon and says that everyone is exhausted and tired, Inosuke doesn't have the courage to attack Tanjiro, he remembers his moments with his friends Tanjiro and Zenitsu and starts crying stating to himself that he can't attack Tanjiro. Before Tanjiro attacks Inosuke, Nezuko Kamado, who become a Human back again from now on, enters the front of the attack and holds Tanjiro. Giyu, Inosuke and Zenitsu are surprised by Nezuko's presence and worried by the fact that Tanjiro bit her shoulder, Nezuko crying apologizes for not being able to understand what was happening when she was a Demon and says that Tanjiro always carries everything on his shoulders. Nezuko begs him not to become a Demon and says that they will both go back home. Tanjiro then starts to scream very loudly and dig his claws into Nezuko's back, Zenitsu holds Tanjiro and says that Nezuko is back to being human and if he continues attacking Nezuko she will die. Inosuke punches Tanjiro several times telling him to return to normal and that Tanjiro was not that type of person but a sweet person to others. Tanjiro then uses Muzan's Shockwave Energy Blast technique and knocks down Inosuke, Zenitsu and Giyu but does not knock down Nezuko who continues hugging Tanjiro with all her strength. Tanjiro's appearance changes and now he has tentacles that look like a spine on his back, then he attacks his friends and Nezuko continues begging Tanjiro to return to normal. Tanjiro tries to hit Zenitsu but Giyu saves him from the tentacles, then he thinks he must kill Tanjiro before he kills someone but soon realizes that Tanjiro has no weakness, because blades red and the Sun cannot affect him. Tanjiro then begins to create an Energy Sphere to attack his friends and just as he was about to fire, Nezuko put her hand in front and Tanjiro dodges her attack but still hits Nezuko's arm leaving her badly injured. Giyu realizes that Tanjiro diverted the attack so as not to hit Nezuko and even though Nezuko is bleeding he doesn't attack her. In this moment, Kanao Tsuyuri takes a medicine that turns Demons back into Humans, the one that Shinobu Kocho gave her before, and decides to sacrifice her remaining eye using the final form of Flower Breath, which leaves his vision is improved but it slowly blinds whoever uses this technique, Kanao had already used the technique before and lost one of his eyes.

Formerly was transformed into a demon by Muzan Kibutsuji, but got out of his control and accopanioned Tanjiro in his journeys before. A young girl with fair skin, 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. She wears a light pink kimono with an asanoha pattern, the lining a paler pink layered with the white wavy yuban underneath as a medium-length trailing skirt kimono. 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. Became a Demon slayer after her brother became Demon King, but still not knows a lot about breathing teqniques.

Kanao Tsuyuri, a Demon Slayer.
A member of the Demon Slayer Corps. Shinobu Kocho's Tsuguko and the adopted sister of Shinobu and Kanae Kocho. A girl of short stature, with large and gentle eyes of a dark lilac color that are framed by thick eyelashes. She had medium-length, thin raven-black hair, tied into a side ponytail on the right of her head and fastened by a pink and green butterfly ornament that once belonged to her adoptive sister, Kanae Kocho. She had straight cut bangs, a straight fringe, and two loose, chin-length strands that curve downwards from above each of her ears. She wore a slightly purple-tinted version of the standard Demon Slayer uniform, just with a knee-length pleated skirt in place of the usual tattsuke-hakama pants. Over this, she wore a short white cloak, fastened on one side by a dark pink triple knot, also sporting knee-high lace-up white boots with tan soles, heels and toes.
Zenitsu Agatsuma, the Demon Slayer.
A member of the Demon Slayer Corps and was travelling companion and friend of Tanjiro Kamado and Nezuko Kamado, along with Inosuke Hashibira before.
A young man of average height with fair skin and downward-sloped, worried-looking eyes that fade from soft brown to gold and golden, forked eyebrows that sharply fade into a warm orange color. He has short, yellow hair of varying lengths, cutting off squarely at the ends where it fades to a darker orange color, that falls in front of his face in uneven bangs, loosely resembling a bowl cut. Wore a paler brown version of the standard Demon Slayer uniform, which consists of a dark brown button-up jacket, a white belt around his waist, and tattsuke hakama pants that extend, as well as his signature white-triangle-patterned, yellow-and-orange gradient haori. As well as this, Zenitsu also had a pair of Kyahan, tied at the front in three white bows, with the same pattern as his haori, pale brown tabi socks, and white-laced zōri.
Inosuke Hashibira, the Demon Slayer.
A member of the Demon Slayer Corps and was travelling companion and friend of Tanjiro Kamado and Nezuko Kamado, along with Zenitsu Agatsuma before. Was a young man of average height and muscular build for his age. His thick, black hair reaches just past his shoulders, fading into blue at the tips and forming an unruly and uneven fringe that falls just above his eyes, puffing out before curving and thinning towards his forehead. In his unique fashion, has customized his Demon Slayer uniform to suit his personal style. His altered attire consisted of baggy hakama pants in a dark gray-blue shade, secured at his hips with a thick belt adorned with fluffy brown deer fur. Unlike his fellow companions, Inosuke forgoed wearing a haori. Instead of the customary leg wraps, he opts for knee-high socks made from bear hide, which served as a base for the sandals he wears, but his heels and toes are left exposed. However, the most distinctive aspect of his appearance is the gray, hollowed-out boar's head that he wears as a mask. Inosuke has modified the boar's head, altering the eyes to allow him to see while wearing it.
Genya Shinazugawa, was a Demon Slayer and the younger brother of the Wind Hashira, Sanemi.
Murata, a member of the Demon Slayer Corps.
Sakonji Urokodaki, retired member of the Demon Slayer Corps, former Water Hashira. A cultivator of the Water Breathing style, having trained Makomo, Sabito, Giyu Tomioka, and Tanjiro Kamado (when he was a human).
Aoi Kanzaki, a Demon Slayer of the Demon Slayer Corps. However, she works as a helper at the Butterfly Mansion, rather than taking to the front lines to fighting demons.
Goto, a member of the Kakushi, the clean-up brigade of the Demon Slayer Corps.
Hotaru Haganezuka and Kotetsu, both is a swordsmiths affiliated with the Demon Slayer Corps.
Tamayo, a demon, who was a skilled doctor. Before her decase, during the final confrontation between humanity and demons, Tamayo, along with Yushiro, her traveling companion, joins forces with the Demon Slayer Corps.

Kyojuro is a young adult of tall stature and lean-muscular build. He has long bright yellow hair with red streaks akin to flames along with two shoulder-length bangs and two chin-length bangs on the side of his head, black forked eyebrows, and golden eyes that fade to red with white pupils. He's known to be charismatic and had an air of great optimism, having an enthusiastic smile plastered on his face nearly all the time. Kyojuro wears the standard black Demon Slayer uniform, tinted brown in the anime, which consisted of a brown button-up jacket with stand collar and long sleeves, a white belt around his waist and tattsuke-hakama pants. Over which, he wears a haori with a white-yellow gradient pattern and red flame-like ridges at the end that his father Shinjuro had once worn and more than likely his father had worn when they were the Flame Hashira respectively. Finally, he wore red kyahan with yellow flames erupting from the bottom-up, with pale brown tabi socks and a pair of white zōri with red straps. (A little nessecery note: all male Rengoku family members (even ancestors) is confirmed to have almost identical appearance as Kyojirou, so his father Shinjuro and little bother Senjuro have alomst similiar looks as him, except that Senjuro have a little bit shorted hair.)

A very tall, broad-shouldered, and muscular man with and white hair. He has quite thin, maroon eyes that appear to slant inwards, each with one long eyelash flowing to the far side of his face. He is considered very attractive as noted by many women and even by Zenitsu; this has led him to use his looks as a tool for his missions whenever persuasion is necessary. Wears a sleeveless version of the standard black Demon Slayer uniform, tinted dark turquoise in the anime, along with a wrap of burgundy cloth around his calves with his tattsuke-hakama pants tuck in, and white-strapped Zōri. He also wears two thick, golden rings around his upper arms and what appear to be a pair of fingerless blue gloves, secured around his middle finger with a band of white and his wrists with another set of thinner gold rings, this time with two on each side.

The younger sister of Kanae Kocho along with her adoptive younger sister Kanao Tsuyuri. After a demon killed her parents, Shinobu joined the Demon Slayer Corps along with her sister in order to protect others from suffering the same fate as her. A petite young woman with a slender build and a fairly pale complexion. She has large eyes that lack pupils, only a haze of gradient purple, making her eyes appear similar to those of insects. She has raven-black wavy hair that fades into a dark purple hue at the ends, styled at the back of her head into a flat yakai-maki bun fastened with a white, turquoise and light purple butterfly ornament. Shinobu wears a dark purple tinted standard Demon Slayer uniform, consisting of a button-up jacket with golden buttons, stand collar, and long sleeves, a shirt pocket on top of the left breast, matching the dark purple color of her tabi socks and her long saggy tattsuke hakama pants, that is wrapped by a pair of white butterfly-patterned Kyahan fading into a pale turquoise to pink shade around her lower legs, fastened with white ribbons. Over her uniform, she wears a white haori that previously belonged to her older sister Kanae, which has a butterfly wing pattern, especially that of a Monarch Butterfly, that fades into a pale turquoise then pink color gradient on the sleeves and hem which are cuffed with a black and white dotted trim. She wears white zōri sandals with purple straps for footwear.

A little short young boy with a lean muscular build, with long straight hair of a black color that fades to a cyan color as it approaches his waist. Hair on loose with two clumps protruding slightly from each side of his head, a set of shorter hair left down to his face, and bangs over his forehead. He also possesses large, empty-looking cyan eyes. He's identical in appearance to his older twin brother Yuichiro. Muichiro wears a tinted bluish black standard corps uniform, consisting of a button-up jacket with a stand collar. the uniform had longer and looser sleeves, hakama in the umanori style, that along his style of sleeves.

Also the older brother of Genya Shinazugawa. Sanemi is a tall man of very muscular build, with spiky long white hair and large almond-shaped eyes framed with long eyelashes; his purple irises also appear to have dark swirls within them. When angered, they appear notably bloodshot. He also has dark patches beneath his eyes, making him appear perpetually tired or restless. His face and body are covered with scars, accrued over his many years of fighting demons. He cuts his hair short somewhere in between the events of the Hashira meeting and the Mugen Train incident. He is usually seen wearing a crazed expression on his face. He wears a black standard Demon Slayer uniform, tinted dark green in the anime, unbuttoned to expose his chest and abs with a white long sleeved haori over it with the kanji for "kill" etched on the back, white buckles around his shins and tabi socks with a pair of white zōri with green straps.

A young man with a fairly muscular build. He has straight-edged black hair of varying lengths, the longest reaching down to his shoulders. His eyes are almond-shaped and tilt upwards on the far sides, and are unique colored due to Obanai possessing heterochromia—his right eye is yellow and his left eye is teal. He is partially blind, barely able to see out of his right eye. His mouth is usually hidden by the bandage he wears over his lower face to hide his large facial scars, which were the result of his family horrifically cutting open his mouth to resemble that of a snake's gape. Wears a black standard Demon Slayer uniform, tinted deep koamaru in the anime, along with a black and white striped haori, the hem and cuffs of which are striped length ways rather than vertically, which covers his hands. Obanai also has bandages as his leg-wraps around his calves giving the resemblance of more classic kyahan, as well as another set of bandages that cover his mouth, and white with blue-strapped zōri on his feet. He is also always seen with his white snake, Kaburamaru, wrapped around his shoulders.

A curvaceous young woman of deceptively muscular build and a pale skin complexion. She stands slightly taller than average. She has large round, pale green eyes with long eyelashes and a small beauty mark beneath each of them. She has long, sakura pink hair that fades into a lime green color at the halfway point, which she wears in three thick braids. She has five shorter, choppy clumps hanging over her face as voluminous bangs, the tips lime green as well. She wears a heavily modified version of the standard black Demon Slayer uniform, tinted dark plum in the anime, along with a plain white haori that was gifted to her by Kyojuro Rengoku. Because of its tight fit, the chest area of her jacket and her undershirt is left unbuttoned, and she wears a short pleated mini skirt in place of the usual tattsuke-hakama pants. She also wears a lime green thigh-high stockings, which Obanai Iguro gave to her and a pair of white zōri with pink straps tied and fastened with a bow on the front.

He's a fairly tall young man of a lean muscular stature and pale complexion. He has choppy black hair of uneven lengths, with jaw length side-bangs, a low messy ponytail at the base of his neck, and bangs falling over his eyes in a choppy fringe. His eyes are sharp and moderately large, having irises a lapis blue color, and their pupils a navy blue, sometimes having his irises completely opaque and empty, just in lapis blue color, and are framed by thin eyebrows. Wears a black standard Demon Slayer uniform, tinted in charcoal color in the anime, consisting on a button-up jacket with golden buttons, stand collar and long sleeves, a white belt, and a tattsuke hakama pants wrapped by white kyahan, having a pair of white zōri with dark blue straps and tabi socks underneath being the same color as his uniform. Over this, Giyu wears a haori that's split down the middle into two different halves: the right one in a carmine color, and the left one in a geometrically patterned rhombi prints, in green, dark green, orange, and yellow. These haori were belonged to his late older sister, Tsutako Tomioka, and his deceased friend Sabito.

Ubuyashiki Family:
Kagaya Ubuyashiki - was the 97th leader of the Demon Slayer Corps, known mainly as Oyakata-sama ("Master") by his subordinates and peers and was also the head of the Ubuyashiki Family. Kagaya has light skin and black shoulder length hair. He had a curse mark that is slowly killing him that also makes his skin look as if it was rotting spreading down his face and covering his eyes, making him unable to see. The curse mark is lavender in color and makes the skin look shriveled. By the time of his death, this curse had spread all over his body making movement nearly impossible. In addition, Kagaya was prone to coughing up blood and his sclera turned into a sickly black. He wore a plain black kimono secured with a tan-colored braided obi over a white juban. His also wore a white, calf-length haori with a unique design of gradient flames of the colors purple and salmon pink rising from the hem up to the half of the sleeves.
Amane Ubuyashikii - She is the wife and primary caretaker of Kagaya and the mother of Hinaki, Nichika, Kiriya, Kanata, and Kuina.
Kiriya, Hinaki, Nichika, Kuina and Kanata. All Ubuyashiki's childrens have a white short hair, except Kiriya, he have a black one.
Kiriya is the only son and middle child of Kagaya and the current head of the Ubuyashiki Household. After his father's passing, he leads the Demon Slayer Corps as the 98th leader. Kiriya has light, pale skin and large eyes. He has the same hairstyle as the rest of his siblings; a fringe covering his eyebrows, colored black. As he was raised as a girl, he takes on a more feminine appearance during his first appearance. During the Final Selection test, Kiriya wears a purple uchikake kimono with patterned flowers and a green obi, supported with a white obiage and indigo obijime along with a white juban under everything. His head is adorned with a wisteria headpiece. Later on in the manga, after he becomes the leader of the Demon Slayer Corps, he wears a black kimono with a long white haori that's reminiscent of his father.

Rui, a demon affiliated with the Twelve Kizuki (Twelve Moons), holding the position of Lower Rank Five. Wore a white, oversized kimono that had spider webs etched on the sleeves and the expanse of the hem, which also possessed a loose collar, decorated with the same dot-like markings as his face, and a dark red obi belt around his waist. He also wore a plain, white juban underneath, and was barefoot. His nails bore the same color of his eyelashes.
Gyutaro and Daki. Daki, was a demon affiliated with the Twelve Kizuki, being the secondary holder of the position of Upper Rank Six, a position she shared with the primary holder, her older brother, Gyutaro. Gyutaro, also was a demon affiliated with the Twelve Kizuki, holding the position of Upper Rank Six, a position he shared with his younger sister. Over a century ago during the Edo period, Gyutaro was a human who worked as a debt collector, Daki was a human child by the name of Ume, who lived in the Rashomon Riverbank of Yoshiwara, the lowest class of the Entertainment District, before they both were turned into demons personally by Douma, who was Upper Rank Six at the time.
Akaza, a demon affiliated with the Twelve Kizuki, holding the position of Upper Rank Three. Over a century ago, Akaza was a human by the name of Hakuji, a prodigious martial artist who trained under Keizo while nursing his daughter, Koyuki, who would later become Akaza's fiancée.
Douma, a demon affiliated with the Twelve Kizuki, holding the second highest position, Upper Rank Two.Over a century ago, Douma held the position of Upper Rank Six, and during that tenure, he turned Gyutaro and Ume into demons and introduced them into the Twelve Kizuki. He is also the leader of the Eternal Paradise Faith, a cult dedicated to worshipping Doma and a place where he listens to all his followers' troubles and gives them advice. He had held this position since he was a human child. It also acts as a place for Doma to gather and kill his victims. This cult also took in Inosuke Hashibira's mother, Kotoha Hashibira, before Douma killed her after finding out that he was eating his followers.
Kokushibo, a demon affiliated with the Twelve Kizuki, holding the highest position, Upper Rank One. Nearly above more than five centuries ago during the Sengoku Era, Kokushibo was a human by the name of Michikatsu Tsugikuni,] a former Demon Slayer, and the older twin brother of Yoriichi Tsugikuni, the strongest Demon Slayer that had ever existed. Kokushibo is also the ancestor of Muichiro Tokito and Yuichiro Tokito and the one responsible for turning Zenitsu Agatsuma's senior, Kaigaku, into a demon and joining the Twelve Kizuki.