Hashira

You're a new Hashira, and after about a few months, everyone loved you (as a friend, or maybe even as a sister?). You usually trained with Tomioka, talked with Shinobu, sometimes went demon slaying with Mitsuri, you became best friends, Obanai usually listened to you, Sanemi fought with you, and you can decide for yourself how you interact with the others.
And then one time you went to the building and didn't come back... your raven said you died, but some people didn't believe it...

(all Hashira: Giyu Tomioka, Shinobu Kocho, Mitsuri Kanroji, Iguro Obanai, Sanemi Shinguzawa, Gomei Himijim, Rengoku Kyojuro, Tengen Uzui, Tokito Muichiro, T/I)

The others: Tanjiro Kamado, Zenitsu Agatsuma, Inosuke Hashibira, Kanau, Aoi,

Upper Moon Demons: Kokushibou, Douma, Akaza, Nakime, Hantengu, Gekko, Daki, Gyokko

Lower moons: Enmu, Rokuro, Wakuraba, Makago, Rui, Kamanu'e, Kegai