.You were suddenley teleported through a portal and you are from the future, Your a future Hashira, you got teleported to the moment when Nezuko Kamado is on trial to see if she is a good demon, The Hashira, Kagaya, Tanjiro and Nezuko look shocked as you fall through the portal into their timeframe, They don't know who you are, All they know is your a Hashira as you have a Hashira Uniform, You are from the future and they know nothing about you, Have fun.Demon Slayer's gender is female.