Various x Reader

Cognitive Dissonance [Demon Slayer]

Muzan Kibutsuji x Reader

C|TW: none,

For centuries Muzan spent his extended life searching for the flower that'll help him conquer the sun. Dedicating his life to becoming powerful would be fruitless without being able to work in the sunlight. He's read every book he could get his hands on and has followed each clue to its dead end. You'd think he would've made a discovery with the number of demons he has under his control but they've proven time and time again that they're incapable of making him proud.

He's long given up on the lower ranks providing anything other than failure, opting to use them as distractions and bait for the demon slayer corps. It's the upper moons that are now responsible for aiding his research on the blue spider lily. Whether he wants to admit it or not it'd be just as pointless considering the plant hasn't been spotted for decades. That won't stop him though. The last thing he'll do is accept that he's never going to survive in the sunlight.

For years you've watched with fascination as your parents worked to create serums and medicine. Your father studied as a botanist and your mother was a pharmacologist. They'd teach you little things about drugs and plants, in the way a child would understand. It always blew your mind that with the right knowledge plants could change people's lives and even save them. That's why you followed their footsteps and combined both of their science backgrounds to continue to aid people.

Aside from making medicines or herbal remedies, you had a passion for unique plants. During your childhood your parents would often travel to different places and take you with them. It seemed that everyone had a special or mythical flower of some sort. Promising to heal mortal illnesses or give humans a gift. Sure it was relatively fictional but your curious mind would always wonder if you could discover a mythical or legendary plant.

Now having the knowledge and resources you sometimes set your duties aside to research unique plant life. For most it seemed like a waste of time yet you were able to resurrect a flower once said to heal deadly illnesses. The Moonlight Zinnia. Its delicate petals shimmered as if they were dusted with silver and the ends of the petal were a soft blue. It was a beautiful flower that allowed you to finally create a cure for the common cold. Its unique genes aided in fighting against multiple rhinoviruses, thus providing the necessary material to create the vaccine.

Humans weren't the only ones applauding your success though. Posing as the adopted child of an elderly couple that happened to study pharmacology, Muzan heard the news. His false parents were marveling at your contribution to the world of medicine and hoped to collaborate in the future. Surely you could help them develop a drug to cure their son's deadly condition. While the vaccine itself caught Muzan's attention he was more interested in the fact that you actually managed to resurrect an extinct plant.

The next night, Muzan broke into your home as you slept. Searching through your lab trying to find the notes you have written about your discovery. He wanted to read every detail so he could understand how you were able to achieve such a feat in a matter of months while he's been going in circles for centuries! His temper seemed to get the best of him as he grew annoyed, the thought of a mere human beating him was enough to have Muzan breaking anything in his reach. It was clear to him that he'd be better off forcing you to do his work.

You wake up in confusion at the strange walls and decor, it wasn't hideous or anything, it was just unfamiliar. As in you don't understand why you aren't in your home. There's an eerie silence, disturb only by the sound of your breathing that becomes heavier as you start to panic.

It pissed him off listening as you lost your mind at the simple act of being relocated. You're supposed to be above this, seeing as you have a great mind. Yet you're sprinting through the halls embodying a frightened child that has lost its mother at the market. He unclenched his teeth and relaxed enough for the veins on his face to disappear before having Nakime direct you to him.

You're not given a moment to comprehend what's happening, Muzan begins asking you questions, expecting you to answer swiftly. Giving you the same treatment he would the lower rank demons, failing to bear in mind that you've just witnessed the walls and doors change around you in a way that shouldn't be possible. He shouts your name through clenched teeth in annoyance, causing you to freeze up.

You didn't expect to ask you questions concerning the fabled Blue Spider Lily that went extinct. Sure you've heard a few rumors and stories about the flower but that didn't explain why you were snatched from your home and trapped in some maze of a mansion! It got worse though, Muzan had no problem admitting that he wanted you to dedicate your life to resurrecting the flower for him. That his goal was to walk into the sunlight as a demon and conquer the human race.

His words go through one ear and out the other as you're trying to understand the reality of your situation you hear Muzan mention transforming you into a demon to have control over you, in case you got any ideas. Snapping out of your thoughts, you blurt out that it'll ruin your chances of being back the Blue Spider Lily, veins appear on his face and his nails become like claws. You reason that according to the rumors the flower only bloomed in the sunlight at certain times so being a demon, you wouldn't be capable of growing the flower.

The woman, Nakime, struck the chords of her biwa before you could continue. Now standing in the empty halls the eerie silence filled the space again, leaving your mind to race as you wondered what would happen. Were you going to die alone without your family finding you, are your parents even going to know where to look? Since Muzan and that woman playing the biwa are demons, does that mean they'll devour you?

The next time you heard the music, you were suddenly in a room standing in front of Muzan. He tells you that from this day forward your sole purpose would be serving him. That you're to dedicate your life to reviving the Blue Spider Lily in order to create a serum. Because you're most useful as a human you'd be forced to do your research under the watch of Doma. The second rank upper moon. You'd be under heavy supervision, surrounded by the members of his cult with nowhere to go.

Again, before you had the chance to protest Nadine struck the chords of her biwa. This time you were falling between the walkways and opened doors. When the sight of the doors faded from your vision you fell onto an empty path. Well except for the tall pale demon standing under a light, a wide grin on his face as he waved the fan he was holding.