Y/N was picked on as an Ubuyashiki daughter. Y/N is the youngest Ubuyashiki daughter, she was born after Muzan was killed. Y/N has always been picked on because she would never fall asleep during the night, she would always fall asleep during the middle of the day. It was something Kagaya and Amane got used to. During the night when everyone else was asleep, y/n would usually walk around outside, she was always quiet, but she loved the night.