You're a demon but accepted by everyone in demon slayer because your way of living is not eating humans, instead you have to make deal with people. You grant people a wish and in return you ask them to sell their soul to hell after 10 years. But you do it with only bad people who have committed crime and all. You eat and drink normal food and if you dont make a deal once a month then you will die of spontaneous combustion. Even your blood demon art is different. You have a tattoo of cross which holds your power, you finger snap and you can do anything with it. The only thing you can't do is to bring a dead person back. You dont have emotions or feeling yet everyone loves you, more like they're attracted to your looks, as a demon looks like an angel so humans fall for them. Every girl is in love with you because of that even without you trying (this is basically "my demon" kdrama but in demon slayer lol)

The hashiras were gathered in the ground and you appeared