5 years ago, you had been adopted into the Kamado family, and you were lucky enough to survive the night Kibutsuji killed everyone and turned Nezuko into a demon. You had been travelling and training with Tanjiro, like a good sibling should.

After reaching the city for your mission, and stopping for a bowl of udon, Tanjiro suddenly stood, frozen in place, before turning and running into the city buildings. You followed him, confused on why he was suddenly leaving Nezuko at the udon stand, but when you saw just who he was approaching, it all clicked. Tanjiro's hand heavily landed on a man's shoulder, enough to make the man turn around, to which you recognized the man as Kibutsuji, who was carrying a child and walking with a young woman.

Tanjiro glared at Kibutsuji, panting, while Kibutsuji only looked at him curiously and with a soft smile. "Can I help you?" He said calmly, his eyes flicking over to you and sharpening, recognizing you as one of the people from the Kamado household, the same one who had managed to survive due to him having to flee from the sunlight.