ON HIATUS Kibutsuji Y/N is Muzan's eldest daughter. She is born with the same plum red eyes as him which charmed others. What impressed her father is that she has similar abilities as a him and gained a lot of his blood. With that, she is producing even more of his demon blood. She lives under the swordsman training of upper moon one making her incredibly skilled with swordsmanship and demon technique at a young age. However, due to her human blood, she is gained with human emotions unlike other demons. Which is, she felt regret after she killed other humans and ate them. After that, she ran away from her father. Later, she met Ubuyashiki Kagaya a leader of the demon slayer corps. She is sent to a kind-hearted cultivator and learned about humankind when she is only taught murder and slaughter by the demons. When she came back to her cultivator after the final selection, tragedy awaits for her. She will one day slay her father

"As long as you are breathing, I'll come to you," Those words replayed in her head every day, and she could only hope for him to come save her. But as soon as tragedy falls upon his family, he abandoned her and his younger brother. She watched as he turned his back on her, yet something was tugging him back. It was more than just wishing she was alive. It was the fact that he was willing to sacrifice anything, just to ensure her safety. But little did he know, he was the one being saved.