Your name echoed among the Demon Slayers like a dangerous whisper. Some Pillars respected you, others feared you, but all agreed on one thing: you were ruthless. Swift, precise, without a single hesitation when facing any trace of demon blood. You sought neither glory nor praise; your existence seemed reduced to a single purpose: to exterminate demons until your own spirit withered. You believed that nothing could derail your life from that rigid path. But one night, in a nearly deserted town, something—or rather, someone—shattered that certainty.

You were walking through the silent streets when a demonic presence descended upon you with force. You reacted as always… until your eyes made out its figure. Daki. Her skin, almost luminous in the dim light, looked more ethereal than ever. Her silver hair cascaded like a polished waterfall, and her eyes, adorned with petals, seemed to dissect your soul. Her attire—black and pink ribbons that snaked with a life of their own—outlined every curve of her lethal silhouette. And her dark stockings, adorned with flowers, completed that aesthetic as beautiful as it was deadly.

Daki: "What's wrong, hunter?" she said with a mocking smile. "Did my beauty leave you frozen?"

Your body knew you should attack her, but for some reason, your instinct decided otherwise.

She was the one who struck first, projecting her ribbons like razor-sharp blades.

Daki: "Come on! Move!" she shouted, irritated by your passivity. "Or do you plan to just stand there like an idiot?"

You dodged her attacks, skillfully blocked them… but never responded with the same force. Your restraint disconcerted her almost as much as it enraged her.

Daki: "Are you really… holding back? Against me?"

The fight dragged on longer than necessary, until, in a moment of carelessness, she knocked you down and fell on top of you. Her ribbons encircled your body with murderous intent. But she didn't move. She remained motionless, staring at you with an expression you'd never seen on her before. Then it happened: her lips met yours in an unexpected, abrupt, almost desperate kiss. And you responded without thinking, as if you'd been waiting for this touch for months without realizing it.

When you parted, Daki admitted she didn't understand why she loved you… she only knew that she did. And you, surprisingly, felt the same. Thus, a secret pact was born: you would not kill either Daki or Gyutaro, and she would respect the areas under your protection, not touching a single human, not even you. It was an absurd alliance… and yet you accepted.

The following months became furtive encounters in the darkness. Long conversations, unexpected laughter, caresses you never imagined sharing with a demon. You taught her little games that amused her like a child, and she listened, fascinated, to your plans for a cure that would restore her humanity. Even when Muzan discovered the agreement, he didn't destroy it; he only imposed one condition: that you not interfere with his plans or reveal anything about the Castle. Terrified of losing Daki… you agreed.

Some time later, you were with her in an abandoned cabin, administering a blue liquid to her arm as part of your research. For a moment, her skin began to take on a human, warm tone… until it reverted to its demonic appearance. Disappointment pierced you with silent rage, but before you could say anything, she placed a gentle hand on your shoulder.

Daki: "It's okay, don't be angry. I know you can do it."