The Reason Why.

(2404 Words!)

Anos: "It's good that your all here already. This makes things easier. This is Tamayo, and her assistant Yushiro. They are both Demons who will be working alongside the demon slayer corps to help make a drug to help you all kill Muzan."

Everyone: "....."

Anos tilted his head in confusion as he spoke.

Anos: "Hrrm? I know it's surprising to see a demon within your headquarters, but I don't think it would cause you all to give such defeated looks."

All the Hashiras present felt a headache when Anos finished speaking. They wanted to attack Tamayo, but ultimately gave up knowing that Anos was the one who brought her, and they couldn't do anything to him anyways.

Kagaya: "Anos Voldigoad-San. I don't mean any disrespect, but you should know that having multiple demons will cause us many, many problems right?"

Anos nodded his head as he replied.

Anos: "Fumu, indeed I do."

Kagaya started to feel a headache appear as he spoke.

Kagaya: "And you still brought these two demons to our headquarters why?"

Anos: "The first being that she has vast medical knowledge acquired through several hundreds of years of research. So I'm having her train Shinobu in the medicinal field. This should make her a more capable doctor faster."

Anos's words surprised the Hashiras who looked at Tamayo and Yushiro suspiciously, but didn't act. They allowed Anos to continue.

Anos: "The second is that she has seen what Kibutsuji Muzan is capable of, and should be a great source of information for you all."

Anos's words didn't really cause as much surprise to the Hashiras as they expected. Tengen even muttered.

Tengen: "I'm somehow not even surprised. Did our fight against him broke my sense of surprise?"

The other Hashiras nodded their heads in agreement as Anos continued with the third and final reason.

Anos: "And last but not least, Tamayo, Yushiro, and Shinobu will be the reason for the defeat of Muzan."

Anos's words turned the atmosphere completely serious as the Hashiras looked at Tamayo and Yushiro in confusion and scepticism. How would these two demons and a Tsugoku be the reason for the defeat of Kibutsuji Muzan?

Kagaya: "Voldigoad-San, could you please explain what you mean?"

Anos: "Tamayo and Shinobu will create a drug that would not only slow down Muzan's cell regeneration, but also speed up his aging making him far, far weaker compared to him without these drugs."

Shinjuro: "Say we trust your words. That with the help of this demon and Kanae's sister, they can create a miracle drug that will not only slow down Muzan cell regeneration, but also speed up his aging. Where will we get the necessary materials and equipment to even make them?"

Anos: "Simple really. You just need to gather the blood from the 12 demon moons. The higher the rank of the demon, the more likely they are to have large concentration of Muzans blood."

Sanemi: "Are you saying that you want us to fight against an Upper Moon Demon just to get some blood to make this "Miracle" drug?"

Anos: "That's right. After all, Tamayo and Shinobu would have already create this drug in the future even if I never intervened. All I'm doing is merely allowing you all a quicker solution to finishing Muzan."

Anos's word's silenced the pillars who all contemplated what they heard from Anos. In the end, all the pillars looked to their leader for the final decision.

Kagaya: "As much as I would have loved to be rid of Muzan as fast as possible, there still remains the fact that Tamayo is a demon. If she does work alongside Shinobu, the Slayer's who are recovering at the butterfly Manor may eventually come to learn of her true identity if she only appears at night. Not to mention the fact that both Tamayo-San and her assistant will have to waste alot of their time to go back and forth no?"

Anos: "Then if its just sunlight that is preventing Tamayo from being able to teach Shinobu, I'll just grant her and the boy immunity to sunlight. Problem solved."

Everyone: "Eh? EH? EHHHHHHHHHHHHHH?!"

Anos's words shocked everyone deeply. To so casually say that he can grant a demon immunity to sunlight was too much of a shock for everyone to comprehend. Sanemi all but growled as he questioned Anos.

Sanemi: "What the hell did you just say?! Do you think this is some kind of joke?!"

Anos sighed before he spoke.

Anos: "It'll be quicker if I showed you."

Tamayo: 'I don't think I'll like whatever he's about to do.'

Anos snapped his fingers, and then pointed his index finger at both Yushiro and Tamayo. Anos then lifted the two of the from the back of their clothes, and under the curious gaze of everyone else, he threw them out through the wall of the Ubuyashiki Manor.

(crash!)

Tamayo and Yushiro groaned in pain as they were thrown through the wall.

Tamayo: "Couldn't you have just asked us to go out peacefully?"

Anos: "I'll keep that in mind for next time something similar happens. Besides, this makes things far faster."

Yushiro: "YOU BASTARD!!! HOW DARE YOU THROW LADY TAMAYO THROUGH A WALL!!! I'LL KILL YOU!!!!!!"

Anos: "You're too noisy."

Anos casted a silencing spell on the still screaming Yushiro, before he spoke.

Anos: "There. You're both now immune to death by sunlight."

Tamayo and Yushiro suddenly froze at Anos's words as they inspect themselves.

Tamayo: "Eh?"

Tamayo then realised that she was outside, under the sun. And she wasn't dying! Tears started falling down her eyes as she chuckled lightly with joy even as the tears continue streaming down her face. She could finally walk under the sun again!

Yushiro was just as shocked as Tamayo but he got over it quickly as he went to make sure his lady Tamayo was alright.

Tamayo: "It's been so long since I've last been able to freely walk under and enjoy the sun. Thank you Anos Voldigoad."

Anos: "Think nothing of it."

Anos turned his head to the Hashiras and even the Ubuyashiki family, all who had expressions of disbelief written all over their faces.

Anos: "(Ahem) If your done gawking, this should resolve all of your worries no?"

Kagaya: "I don't have any issues as I've known about Tamayo-San as she has been known since the founding times of the demon slayer corps. However, what of everyone else? Do any of you have an objection to Tamayo staying here?"

All the other Hashiras were surprised that their leader knew about Tamayo, but they decided to focus on their answer.

Gyomei: "I will be honest and say that I cannot trust these demons. However, I will try to believe in them just this once only because I wish for the death of Kibutsuji Muzan."

Most of the others agreed with Gyomei, except Sanemi.

Sanemi: "That's it?! You're just gonna trust these demons?! Have you forgotten what we live, fight, and die for?! It's to get rid of abominations like them! How many humans must they have eaten to survive this long huh?! How many innocent people have been devoured so they can live?! And now these Demons are even immune to sunlight! The only logical course of action is to kill them."

Yushiro glared at Sanemi for his words, however, Tamayo stopped him from yelling at Sanemi as she spoke.

Tamayo: "Your words are true. I don't deserve to live for what I've done in the past. However, I've modified mine and Yushiros body to be able to live off just a drop of human blood. If you want to kill me I have no objections to it. However, like all of you I wish to see that monster Kibutsuji Muzan dead first. If afterwards you still wish to kill me, then I won't stop you. All I ask now is that you trust me enough to help you end that man's legacy. Afterall, I also have a personal grudge against him."

Sanemi growled as he spoke.

Sanemi: "Fine then, however to prove that you really will not harm anyone during your 'Stay', I wish to put all three of you on a trial. If you pass it, then I will agree with this whole shenanigans. If you fail, I'm decapitating you right here and now."

Tamayo: "I accept."

Kagaya looked at Sanemi as he spoke.

Kagaya Ubuyashiki: "Sanemi."

Sanemi bowed respectfully to Ubuyashiki as he spoke his tone apologetic.

Sanemi: "Forgive me Oyakata-Sama, but this is for everyone's safety."

Kagaya: "... Very well then, you may continue."

Sanemi: "I thank you for your mercy Oyakata-Sama."

Kanae looked rather disappointed with Sanemi, but stayed silent as she continued watching everything that was happening.

Sanemi walked up to the three demons, before he drew his blade and cut his forearm causing blood to drip. The moment Tamayo and Yushiro smelt his blood, they both felt lightheaded and tipsy as if they were drunk as Tamayo muttered.

Tamayo: "This scent, is this Marechi blood?"

Sanemi: "That's right. I know you demons can't resist the smell and taste of this blood now can you?!"

Yushiro scoffed at Sanemi quite offended by his words as he spoke.

Yushiro: "While it's true that Marechi blood is a very rare delicacy for demons, Lady Tamayo has modified our bodies to not go insane over Marechi blood. Although it's still has that sweet scent, it is just a slight nuisance for us. Don't forget, we've helped many humans throughout the hundreds of years travelling around, and Lady Tamayo knew that if we ever encountered a human with Marechi blood, it could cause us problems, so she made sure when she modified our bodies that Marechi blood isn't much of a problem for us."

Sanemi: "..."

Anos: "What a 'windy' surprise no?"

Everyone looked at Anos blankly as Anos muttered to himself.

Anos: "Even such jokes don't make them laugh. I was so sure of the joke as well."

Sanemi's eye twitched in annoyance not just at Anos's words, but at what he was just told about the demons standing before him.

Anos: "Does this satisfy you Shinazugawa-San?"

Sanemi: "Tch. If I learn that even a single one if you harmed a human, its off with your heads."

Leaving those words behind, Sanemi flicked the blood of his blade before sheathing it and returning to the wall where everyone else was watching.

Tamayo: "I promise for as long as I stay here, not a single human will be harmed."

Kagaya the spoke up.

Kagaya: "Is there any more objections?"

Kanae raised her hand pulling all eyes to her as she spoke.

Kanae: "It's not that I have an objection to Tamayo-San teaching Shinobu, but there's a question for Voldigoad-San that only he can answer."

Anos: "What is your question?"

Kanae took a deep breath before asking her question.

Kanae: "Anos Voldigoad, why are you doing all this? Why do you go out of your way to help us and not the demons? I mean, your a demon as well no? And one with power clearly surpassing all the Demon Moons and even Muzan. So why then are you helping us to beat Muzan if you can do it yourself? You even beat all the Hashiras without any difficulties, so what reason would you have for doing all this?"

Anos: "An excellent question indeed. I believe your asking this because you worry about your sister?"

Kanae just nodded her head. Anos continued.

Anos: "My reason is really rather simple. Tell me Kanae Kochou, why does anyone do anything?"

Kanae: "?"

Anos: "Sheer Absolute Boredom."

Kanae: "Huh?"

Anos: "You see, I've gone Eons with nothing to entertain myself with. As the strongest, you're always admired, envied, and even hated by others. However, I've become so strong that I cannot find entertainment in fighting with full strength as everyone would simply die before I even did anything. So I decided to travel and explore the vast Omniverse to discover a possible opponent to rid myself of this boredom, or to find anything else that could bring me entertainment."

To everyone's surprise, Kanae stood before Anos with her blade drawn to his neck as she yelled. Her expression was one of anger.

Kanae: "Then answer me right now. What is Shinobu to you?! Is she just a pawn you want to use to bring yourself some entertainment?!"

Anos: "You're anger is unjustified. Just because I am in search of entertainment does not mean that I view others as pawns to be used to entertain myself. Besides, If I wanted to simply use you all as pawns, there'd be no way I'd be so willing to help. I'd just forcefully control you without a care. I am a heartless monster, I would not care even if I ripped an unborn child out their mothers womb and force feed them their child. But, I do not do it because it brings me no joy as many things do."

Kanae: "You really don't have any bad intentions for Shinobu and everyone else?"

Anos: "I'm am merely trying out what it's like to be a mentor, and if being one is as rewarding as I've heard. Just know that I do not like my strength and authority to be questioned. Keep that in mind and fir the most part there's nothing that could really anger me."

Kanae stared into Anos eyes for around a minute or so before she released a tired sigh and sheathed her blade as she spoke.

Kanae: "Then I'll put all my trust that you aren't completely bad Voldigoad-San. Maybe a little messed up in the head, but nothing new experiences can't possibly change."

Anos: "Great. Then take Tamayo and Yushiro with you and go meet Shinobu. She will start her lessons right away, and the rest will follow me to begin their training."

Kagaya closed his eyes contemplating all that he's heard, before he released a tired sigh and spoke.

Kagaya: "This Hashira meeting is now dismissed. All of you please follow Voldigoad-San to train. If he really can help you, then at least try once to see if you it helps you all."

All the pillars bowed their heads respectfully as they said their farewells at the same time.

Hashiras: "Yes Oyakata-Sama!"

The Hashiras all reluctantly followed Anos as Kanae brought Yushiro and Tamayo to go meet Shinobu and start her lessons.