As the eldest daughter of the Genji family, she was "given" by her father as a gift to the Ubuyashiki family as an ally because she has a thin-blood constitution that can suppress ghosts and destroy ghosts. In order to overthrow his father's rule and be influenced by Yoya, he vowed to destroy ghosts (the fake one is actually terrible). The story of his outstanding strength started as a Butterfly Blade apprentice and later went on a mission with Saneya (blood group) and later he was able to stand on his own (there will be a twist in the later stage) and finally grew up.
The heroine is not stupid and sweet, and her strength and talent are mainly due to her natural blood and warrior heritage. The heroine is not always smooth sailing and will temper herself. The heroine's emotions are relatively indifferent at the beginning, because she is a chess piece that is often abandoned. Later, the character background will be changed. There is a high probability that there will be a little bit of OOC in this story. And the others all have one-way or two-way arrows. (Except for official roles) The heroine will create her own breathing method later. The heroine entered the Demon Slayer Corps two years earlier than Tanjiro. At that time, the butterfly ninja hero was already a pillar, and the immortal Kawa Iguro was doing tasks with the heroine for the first-class team members.
Purpose: World peace