Why do people fear the night? Is it the darkness? Is it the various things that go bump in the night? The answer is both. And the things that go bump in the night are dangerous. Demons… occasionally referred to differently depending on the region and country.
In the land of Japan, the local name for Demons was Oni. And throughout the millennia, multiple Demons have appeared in the county, some even becoming powerful enough to become a global threat, earning the title of Demon King, only to the defeated by the international organization that went into the night and bumped back. The Demon Slayer Corps. With the defeat of the, at the time, oldest Demons in the world, Muzan Kibutsuji, the world started to change. While Demons continued to appear over the centuries, none of them came close to the power Muzan Kibutsuji possessed. Some got close to a level of power comparable to Muzan's elite subordinates, the 12 Kizuki, but never to a level comparable to the Demon King himself.
One such Demon that appeared near the dawn of a new era was the female Demon known only as Hebi, who was compared to Gyutaro and Daki, the Demon siblings that shared the position of the Upper Rank Six amongst the 12 Kizuki during the reign of Muzan Kibutsuji. While Hebi wasn't the most violent Demon in the Japanese city that she called home, she caught the attention of the Demon Slayers when people started talking about her after witnessing her feast on the corpses left behind after a scuffle between the local yakuza and a gang of small timers who had tried to claim some territory in the slums of the city. The fact that she got her food by working in the criminal underworld as a cleaner instead of actively going on killing sprees wasn't something that the Demon Slayers sent to eliminate her paid attention to or at least didn't acknowledge. After a long and difficult fight, Hebi's head was separated from her body, but that wasn't enough to keep her down.
There was a reason why Hebi was compared to Gyutaro and Daki. She was difficult to put down. While the Demon Siblings required the Demon Slayers to decapitate both siblings at the same time in order to kill them, Hebi had a different trick up her sleeves that made her difficult to put down. Her Blood Demon Art. Yamata no Orochi. A total of seven demonic snakes that Hebi could use in different ways, like attaching them to her body in different places to gain additional limbs. But the aspect of Hebi's Blood Art that made her difficult to kill was the fact that she could consume her snakes in order to essentially give herself extra lives, making it necessary to cut her head off a total of eight times in order to kill her permanently. But her ultimate ace was her technique known as Snake Rebirth, transferring her consciousness to her last snake, which she kept hidden somewhere else, discarding her humanoid body, eventually turning the last snake into a new humanoid body and with time, spawning seven new snakes.
The Demon went into hiding after her encounter with the Demon Slayers, remaining hidden from the world for the following three hundred years until a chance encounter with a certain green haired child that would change the course of history happened.
