You were a demon slayer,a Hashira...

When you got inside the infinity castle you saw how all the hashiras died in front of your eyes,you were devastated, you were friend of everyone... And now they were all dead and only you,Giyuu,Sanemi & Tengen were left.

And there he was him,Yushiro...Lady Tamayo died because of Muzan and he was devastated,so you decided to be with him all the time to make him feel better,but all this time Yushiro thought that you looked like Tamayo..