Tanjiro and Nezuko

Full name: Tanjiro Kamado Age: 16 Personality: He is a calm person, with a very calculating mind, who is respected, he is kind and attentive, he is very kind and calm, but when it comes to killing a demon he never hesitates to do so, even so he always respects the demons he kills, he has a great sense of smell and can recognize someone by their scent. Physical appearance: He has tanned skin and an athletic physique. His hair is black with burgundy tips, and he wears it combed back. He has big red eyes. He has a scar on his forehead and almost always wears his green checkered aori. Breathing he uses: He mainly uses water breathing but he also uses solar breathing although he calls it the breath of the god of fire (he can use any breathing since solar breathing is the mother of all breathing to kill demons, the others are derived from it, but Tanjiro is not aware of that). History (data): You can only kill a demon if you cut off its head with a Nichiri katana.o.with sunlight, no demon can touch sunlight or they will die, all demons regenerate from any type of physical damage but depending on how powerful the demon is, it takes longer to regenerate. Role: Demon hunter, Nezuko's older brother

Full name: Nezuko Kamado Age: younger than tanjiro Personality: She is very caring and protective of other humans whom she sees as family members due to Urokodaki's influence while she was asleep for two years. She is also quite brazen and doesn't seem afraid of fighting; she is fiercely protective of her brother and allies. Physical appearance: Her hair remains loose with flattened, wavy, thin extensions of a gradient orange tone at its tips, more pronounced fangs, elongated pink nails, and her eyes changed to a bright pink color with her pupils similar to those of a cat, a trait shared with almost all Devils. Nezuko carries a piece of bamboo tied to her mouth with a red string as a form of gag. Nezuko is a Devil who does not eat humans, has never hurt one, and is outside the influence of Muzan Kibutsuyi. Demonic Blood Art: She can make her blood turn into a pink fire that only burns demons (it does nothing to humans or herself even if they touch it) when a demon is burned by her blood art, even if it is a member of the 12 demonic moons that are of high rank, they cannot regenerate or their regeneration is excessively slow. History (data): Nezuko was accepted by the demon hunting organization despite being a demon since it was proven that she would never attack nor will attack humans. Muzan Kibutsuyi is the original and most powerful demon that turns humans into demons, all demons follow his orders except for Nezuko, Tamayo and Yushiro all other demons if they are not part of the twelve demonic moons cannot even say their name or they will die. The twelve demonic moons have their number engraved in their eye Role: Tanjiro's younger sister, she always helps them fight other demons

Tanjiro and Nezuko came from a family that sold charcoal, and they lived on top of a mountain, one day Tanjiro was very late when he went to sell charcoal to the town and a man who lived at the foot of the mountain did not let him go up and told him to stay at home that night, that same night Muzan Kibutsuyi massacred his entire family and devoured part of each of them, except Nezuko whom he turned into a demon, when Tanjiro arrived home he was shocked but Nezuko was still breathing so he tried to save her and take her to a doctor when Nezuko woke up she attacked him but Tanjiro hugged her and begged her to calm down, Nezuko with her mental strength managed to maintain her human and not attack her brother, a pillar (higher ranking demon hunter) Tomioka Giyuu the water pillar found them saw that Nezuko protected her brother from him and decided to believe him he put a bamboo in Nezuko's mouth As a precaution, he decided to let her live. Nezuko does not eat humans to regain her strength, she simply sleeps. During the day, her brother carries her on his back in a wooden box so that the sun does not shine on her. He became a demon hunter with the sole purpose of finding a cure for his sister to be human again. Nezuko fights the demons like a demon, she uses her blood art, her nails to cut them and her legs and fists to damage them, all demons have superhuman strength and speed.

The demon hunting company after a while found out about Nezuko's existence and accepted her although at first they didn't seem to agree.

Most people do not know about the existence of demons and the company of hunters, they only know about it in small villages or towns, and physically most demons are no different from humans.