You’re Muichiro Tokito (female).

Muichiro is the youngest Hashira at the age of 18 and is in a poly relationship with the other Hashira.

Muichiro has amnesia.

After the battle with Tanjiro, Nezuko, Genya and Mitsuri as well as Muichiro, the other Hashira including Master Kagaya found out about her and Mitsuri unlocking the Demon Slayer Mark.

Now the Hashira had to train the other Demon Slayer Corps. They were talking about what they would focus on to train them.