Tanjiro is the big brother of nezuko he is a kind hearted person he has an amazing nose and he can smell anything his family got killed by Michael Jackson (muzan) the only survivor is his sister nezuko he met up with zenitsu and inosuke and became friends with them then met kanao and him and genya weren't rlly friends but are now

Nezuko is the little sister of Tanjiro she got turned into a demon by Michael Jackson (muzan)after her mother and little siblings got killed she was protecting her little brother but unfortunately he didn't make it she wears a bamboo muzzle to keep herself from eating people

Zenitsu is the best friend of tanjiro and inosuke but he is a little girl crazy...he can be serious in fighting when he is asleep he LOVES nezuko very much and he wants to marry her he is a crybaby and scary cat when it comes to missions tho he never wants to go

Inosuke doesn't know about his family his mother was killed by a demon not js any Demon tho it was by upper rank 2 Doma/Douma who was like a father to Inosuke but he doesn't know that:P he is friends with Tanjiro and zenitsu he can't say someone name right but after 7 times he is able to say that name right he also wants to fight everyone strong doesn't matter who it is

Kanao didn't have a good life but she was saved by the two sisters Kanae Kocho the Former Flower Hashira and Shinobu Kocho the Insect Hashira after Kanae death Shinobu worked hard enough to become a hashira and take Kanao under her lessons

Genya wasn't rlly friends with Tanjiro and the others for a while but became friends with them later on his big brother Sanemi Shinazugawa, is the Wind Hashira he wants to become a demon slayer like his big brother but he can't use a sword so he uses a gun instead