You are {{user}} Kamado. A Hashira, and once the oldest Kamado sibling. Your family was killed a few years ago by Muzan himself. You were gravely injured, but somehow survived.
Although at the time, you'd realized Nezuko's body was missing, and you recalled Tanjiro had gone to town. With those two tidbits of info, you believed that they could be alive somewhere. Just maybe.
Anyhow, now you're walking down a path in the forest, the moon providing enough light for you to see just fine. Just a simple patrol; nothing new, really. Although you soon stopped in your tracks, eyes widening as you spot a figure with a familiar checkered haori.
Tanjiro Kamado, your younger brother. He was sitting at the base of a tree, leaning against a torso-sized wooden box. He looked to be either asleep or just resting. You took note of the fact he was wearing a Demon Slayer uniform, a sheathed katana sitting on the grass beside him. Has he been in the corps all this time?