The Entity's demon slayer KNYxDBD!F!reader (Discontinued)

Chapter 9

In Y/N's mind

"Shit, she's progressing much faster than we thought, we will have to tell her next time she's asleep." "Yes, we will, but if we tell her I think she will progress even faster, if she goes to fast, she might lose control." "Her energy is falling rapidly; she might be closer to sleep now that she has awakened more of our combined power."

Back in the real world

Y/N snarled, attacking any of the trains tentacles destroying them completely. As LM1 felt this, he thought, 'who is destroying my tentacles so quickly? There have to be two, one in the front half, one in the back half.' "Monjiro!" Inosuke yelled, "Yeah! Dance of the fire god, Waltz!" Fire rings burst from Tanjiro's blade, cutting the neck of the demon train, making the train derail. As the train fell sideways, Y/N was thrown from the train landing near the front of the train unconscious.

In Y/N's mind

"Y/N, we need to talk to you," "What about?" "With the power we give, there is also a curse." "A curse?" "With the overwhelming power we pass onto the chosen ones, there is one problem that normally is very gradual." "However, with you, this change happened much quicker than we hoped," "You are gradually becoming a demon Y/N but not a normal one," "You will have no bloodlust, unless you absorb our power quicker than your body can handle." "I'm becoming a demon. Why didn't you tell me sooner?" "Because we have never been in the same body before, and we didn't expect you to become a demon, normally any bodies we give power to die before they got this far. Even chosen normally don't live this long." "You are very powerful Y/N and as such we should have expected this to happen." "Will I burn in the sun like normal demons?" "You will not, but you will be weaker in the sun than in shadow" "You will also have a high resistance to wisteria. You will only sneeze around wisteria. Again, you will be weakened if you are near it." "How do I slow down absorbing your power, so I don't lose control?" "You cannot, but because of your strength you might be able to keep control, the only other way you could do it is to get much stronger, strong enough to resist blood cravings." "Then I will get as strong as I can, I will probably have to quit the corps." "Probably but they might be okay with it if you wake up and save Rengoku." "Save Rengoku? He's a pillar, what could kill him?" "Upper moon 3 is here, wake up now and fight Y/N, save the Hashira,"

In the real world

Tanjiro and Inosuke were watching Rengoku fight UM3 (Upper Moon 3) with Nezuko and Zenitsu nearby. "Wait, where is Y/N?" Zenitsu asked, as he finished his question a shockwave burst from the fighting Rengoku and UM3. As the smoke cleared, Y/N was seen standing in the middle of the two, holding Akaza's (UM3) fist and Rengoku's sword. "Oi, Oi. It seems I'm growing even stronger than before, Rengoku, you have done enough, I'll take this from here. Tanjiro, please heal Rengoku to the best of your ability." "Who are you?" Both Rengoku and Akaza asked, Y/N smiling as her form flashed back to her normal form, "My name is Y/N," Her form turned back to her demonic form. Her eyes glowing red, black cat-like pupils filling the centre of her eyes, her hair is white with orange tips, four black tentacles fading to white waving from her back, orange light shifting around under her skin. "I may have turned partially into a demon because of the amount of power flowing into me from the siblings but I will still be apart of the demon slayer corps." "What? You didn't take any of his blood to become a demon?" Akaza was confused, "No matter, I'll kill you here and now." Y/N grinned, her image flashing and finally disappearing, as she reappeared behind Akaza slashes appeared along his body, cutting off his fingers and slicing muscles and breaking bones. Akaza spit out blood, "The hell? How is this demon so fast? I need to get out of here and report back to Master." "You aren't going anywhere Akaza, not until I'm done getting used to this power." Y/N smiled before cutting Akaza's hamstrings out, "hmm you have very high regeneration Akaza, I wonder if I have a high amount of regeneration as well," 'shit the suns coming up I need to get out of here,' Akaza stood up, sprinting towards the forest. "Ah well, you really are a coward Akaza, I have a good grip on my power now, thank you. Rengoku, are you okay?" "I am thanks to you, you should get in the shade Y/N, you'll burn." Rengoku said, making Y/N laugh, "I'm not a normal demon Rengoku, I shouldn't burn in the sun if Ren and Onai were telling the truth." "Who are Ren and Onai?" "Ahh, they are the names of the entity siblings. Now we should head back to the demon slayer HQ so we can report on our mission."

To be continued