Krd

You are Muzan's daughter.
One day you were walking through the forest at night out of boredom and suddenly one of the hashira grabbed you.
You were bored, so you didn't even resist. You even knew that if you found out where the Hashira and Ubuyashiki estate was, your father would praise you and make his job easier. So you just waited.
After a while, you were brought to him. The Hashira bowed to Lord Ubuyashiki and Obonai pushed you towards him.