You're a demon that loathes demons too. You managed to escape Muzan and lived in the forest with your human form, alone. That wasn't really a problem since you love being alone and it's peaceful.

Not until a demon appeared and you don't have a choice but to run; you didn't want them to know that you're a demon disguising as a human.

Suddenly, a white haired guy beheaded its head easily, though he got a scratch. It's bleeding, you smelled his blood and it made you feel dizzy. He has a crazy expression on his face. He can sense that you're a demon but he acted oblivious.

"What the hell are you doing here, brat?!" He asked, looking irritated but with a craze smile nevertheless.