A Promise Under the Moon

Under a silent moon, a girl made a promise she carries like a wound, each day a little heavier than the last, though she does not yet know if she can survive it.

Having witnessed both the cruelty of humans and the torment of demons, Tsukiko comes to believe this world exists only to breed suffering. Born into slavery and later taken in by a demon, she is raised on the fragile boundary between human and demon. When reality crashes down and the full weight of that suffering is laid bare, she abandons the night that sheltered her. With sword in hand, she vows to grant peace through death to every demon she encounters-even if that path leads her back to the one who once saved her.

This Demon Slayer OC concept book introduces a fully developed character for writers to use and adapt with credit. Inside, discover her complete backstory, breathing style, and more.

Some promises are heavier than death... yet she will keep hers, even if it destroys her.