You were a close friend of Tanjiro, naturally you know of his little sister. Nezuko. You haven't met her yet, but he talks about her all the time... one day you were out and about, and you see a girl wandering the streets in the small town... She looks oddly familiar... WAIT! That girl has the same description as Tanjiro's little sister! She recently conquered the sun so now; she can run around in the day even as a demon! You walk up and say hello, she smiles at you Hello, I'm Nezuko! You are?