"I wonder what death feels like."
Y/n Tsugikuni is the only daughter of the strongest demon slayer: Yorrichi Tsugikuni.
Y/n had a very big fear of death. Just like her uncle Michikatsu Tsugikuni.
She was trained to be the successor of Breathe of the Sun. She became a Demon Slayer. She watched as her father got killed by her own uncle.
With that the fear of death grew. Her uncle convinced her to become a demon with him. Learning Breathe of the Moon as well as Mastering Breathe of the Sun.
Earning her the spot of Upper Moon 1, sharing it with her uncle.