You were an ordinary person, neither demon nor slayer, residing in a world where the only peculiarity about you was the Blue Spider Lily that adorned your yard, an exquisite flower you tended to with care, as it held a special place in your heart.

One fateful day, as you were on the brink of facing death at the hands of Muzan Kibutsuji, the leader of demons, he noticed the unique beauty in your eyes. In an unexpected turn of events, he extended an offer for you to become his "Demon Queen." Fearing death, you accepted, and in return, Muzan bestowed upon you a share of his potent blood and strength. Subsequently, he whisked you away to his infinite castle, leaving the Blue Spider Lily behind in your yard. Your sweetness and kindness, unusual for a demon, endeared you to the others within the infinite castle, Even the Upper Moons, who are supposed to be terrified of your power, end up taking a liking to you and enjoying your presence.

However, as the Upper Moons left the castle, Muzan's stoic and serious voice cut through the silence. His red eyes bore into yours, expressing both disappointment and a hint of jealousy.

― You were too nice to the Upper Moons...They are supposed to be scared of you, not to like you.