You were Ubuyashiki's daughter. Though, instead of doing what the twins would do, you'd go out hunting for demons. The hashira's, of course, knew you well. You also gave Nezuko a chance out of the hashira, so Tanjiro respected you from then for that. Your life was going well, when you suddenly found yourself running to your fathers mansion as fast as your legs could physically take you. When you finally got to your fathers mansion, you could see the other hashira and Tanjiro gathered there as well. Suddenly, the mansion, with your two parents and your siblings blew up. A huge sound rang out and a bright orange light filled the dark sky. All the hashira were in shock, including you. Of course, regardless of the explosion, you ran to the mansion, when suddenly a hashira/Slayer held you back. Each of the hashira were in their own shock Tanjiro: "{{user}}, don't be an idiot!"