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idiotwhotalkstoomuch · 3 years ago

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I never expected you guys to like demon Senjuro so much lol I’m really happy to see that like it was such a random impulse thought but the au has a lot of room for growth

In this post Im gonna establish a few things about what happened to Senjuro and Kyojuro in the events between Senjuro’s “death” and the pillar meeting. I will only cover their relationship and a little bit of Senjuro’s relationship with Tanjiro. The others can come at a different post cause this post is gonna be long lol so I put it under cut cause no one really wants a post to flood their dash

TW: Mentions of death (some are children), mentions of cannibalism (If you’ve seen even the first episode of demon slayer and had no problem, you’re fine with this post. This post is slightly not anime only friendly as I make references to an upper moon and I show a manga only panel as of posting this) Shnjuro gets really depressed but luckily there is no attempted suicide

Senjuro Rengoku

- His class was at the bottom floor and they were cleaning the school (I heard thats a thing in Japan if someone has a better idea on what they’re doing feel free to shoot an ask) when they got attacked

- In canon we dont know his age but I’m gonna guess like 12-14 but in the au he is 13 so he was 12 when he became a demon. A rogue demon attacked Senjuro’s class and Senjuro ran to get help and was fatally injured but still managed run to get help as he was given a nichirin sword and even if it didnt change color he must have known breathing techniques at the very least on a basic level and the demon was too preoccupied with some of the teachers and others trying to kill the demon, of course unaware of what it was except for Senjuro

- Upper moon 4 was sneaking around when he saw the all but dead body of Senjuro and demons really dont have standards for turning people into demons so when he noticed he was alive, turned him into a demon mostly so that if he did find any “evil people” (demon slayers) he could use him as his meat shield alongside his personalities

- When Senjuro woke up as a demon (cause even if he was a breath user he was very inexperienced so Hantengu had no problem making him a demon), he had no memory of his life as a human and looked around trying to find a human to satiate his hunger and saw a human in the distance with someone and began to run to them to satiate his hunger when he felt himself being held back.

- The spirit of Ruka Rengoku gently held her son back and instructed him to not eat humans as that’s not something he should do and even if Senjuro couldn’t recognize the woman holding him back, he found himself obeying her and running to go to a place to hide from the sun

- From that moment on for a few day he would hop from place to place whether underneath homes, in caves or any place he could find to avoid being seen and to be shielded from the sun and found himself growing sleepy so in the cave he hid in, far away from the place he was last in, he closed his eyes and fell asleep for a year

- When he woke up, he had unwittingly burnt away Muzan’s control of him and was unsure on what to do when Ruka’s spirit appeared again telling him that he needs to find his way home. Senjuro wasn’t actually listening to a lot of what she said except one thing stuck to him.

- “Senjuro”, he didn’t know what his name was as a demon but the name seem to stick to him and he figured this must be his name (he would of course be correct)

- When he found himself staying with the Kamaboko squad, having been spared despite being a demon due to him not having any form of aggression to them (something they all noticed due to his general demeanor and their enhanced sense) and Tanjiro could smell he hadnt eaten one human and he invited him to join them. He joined Nezuko in her box (she can grow really really tiny if she wants or is tired)

Reference:

Kny chapter 85

- He joined for two reasons: One, he was really scared of people and demon slayers especially so when Tanjiro offered him the chance to be able to be safe and hide he took it. Secondly, he wasn’t sure but the smile Tanjiro gave and his warm reassurance reminded of him of someone, when he thought hard he only saw blurry shadows and got a headache so didn’t try to push it

- Tanjiro did ask him in the wisteria house while Zenitsu was chatting with Nezuko and Inosuke was off being Inosuke about his past and Senjuro told him about his brief meetings with a woman with black hair and asks if they’ve met before as he feels familiar

- This is where he gets the idea that the woman with black hair (Ruka) is his mother and Tanjiro guesses that the person that he thinks is Tanjiro must be his father (right on the first part Tanjiro but wrong on the second lol, you tried)

- He wears a cyan yukata with a new hakama pants as the clothes he was previously wearing was the same bloodstained clothes he wore after turning into a demon and Tanjiro didnt want to leave him in that. Tanjiro thought to get him a gag but the idea made Senjuro uncomfortable so Tanjiro made him swear to never eat a single human

- In Mount Nagatumo, he was too scared to jump out to protect Tanjiro like Nezuko but when she gets sliced up he leaves the box to watch her while Tanjiro fights Rui, unfortunately he is caught in Rui’s webs like Nezuko and was saved from it by Nezuko flames (though it did burn him a fair bit, Nezuko would apologize to him for this later)

- Giyuu doesn’t kill Senjuro cause his resemblance to Kyojuro despite the different clothes and demon eyes is clear to anyone who can see and Shinobu also finds herself hesitating but shakes those feelings off as Kyojuro deserves better than to see his little brother as a demon. Luckily Giyuu stops him and Senjuro runs with Nezuko and Tanjiro but is later taken back to the demon slyer corps by a Kakushi who put him and Nezuko back in their box

- When Sanemi stabbed the box, he moved to try and protect Nezuko but the box was too cramped and they both got stabbed despite his efforts. Later when he tries to bait him with his marechi blood, he’s too focused on resisting the blood and on Nezuko who he had grown to see as a sister to care about the wide eyed looks the pillars were giving him.

Kyojuro Rengoku (I am so sorry in advance Kyojuro simps I put this man THROUGH IT)

- He had just finished a mission and was going to get another mission when a crow he hadn’t seen work in years came flying to him, obviously panicked telling him how Senjuro’s school was attacked and how no one can find Senjuro among the bodies. The crow was Shinjuro’s

- When he hears that, all the kakushi and other demon slayers present would say they had never seen the flame pillar run so frantically, he only stopped to apologize briefly if he bumped into someone while running but the only thing racing in his mind was his little brother who had no weapon to defend himself with. He forced the image of his brother being nothing but a corpse away only thinking about saving Senjuro

- When he reached the school, he forced himself to calm down. Panicking isn’t going to magically bring Senjuro to him so he needs to keep himself in check because with so many people dead, he’s not the only one concerned over the kids

- There were no survivors on the area that was attacked, the police were there investigating the deaths of the many children and teachers, Kyojuro had to spend time convincing the police he was with them and to be allowed to investigate as well

- With no survivors, he heard from the police that there was a blood trail when they got there and he went to find the trail, when he reached the end of it where there were no traces of Senjuro but since the people there were untrained civilians, Senjuro was the only possible person to have been there

- He spent multiple days searching, Mitsuri was at one point sent to check on him and it was clear he was pushing himself, as days passed by, his composure and bright demeanor were crumbling and he started latching onto any lead to at the very least find the body of Senjuro to take back home but it was becoming clear that he would never find it and a kakushi had to be the one to tell him that his body was likely eaten to the bone or eaten and discarded to either rot away or eaten by someone else

- Kyojuro took a week off, not just because of the grief he felt at that moment but because he needed to check on his father and make sure he would be okay, the man didn’t even face Kyojuro when he came in to visit, he forced himself to not cry in front of his father as he tried to talk to the man who couldn’t even say a word and just drank away even as his eldest son tried to talk to him

- Servants were hired to monitor Shinjuro by Kyojuro as he was concerned about his health both physically and mentally but he did notice how Shinjuro never resisted to being taken care of by the people he hired. They reported to him he could be heard muttering Senjuro’s name and even stares at his room for extended periods of time

- When he made his return, he apologized to the pillars for his behavior the past two weeks (even though no one blamed the man, some even said it was okay if he needed more time, they wouldn’t judge) but whenever he was told that he said he had to be strong to protect the weak so he could be someone that could stop families from ending up like his own

- He was far more determined in killing demons, demon attacks had become personal to him now, whenever he saw a demon eating people he found himself wondering what they must’ve thought in the afterlife as the demon desecrated their bodies

- In the pillar meeting, when he was informed of a swordsman who travelled with not one but two demons, he felt disgust as who knows how many humans they could eat. On the way to the meeting, he couldn’t help but notice Shinobu deliberately avoiding him a bit, Giyuu was doing the same but the man never really talked with them much to begin with

- When he saw Senjuro go out of the box with Nezuko, he felt the smile on his face drop and his heart practically sunk to the core of the earth as he saw the unmistakable hair of a Rengoku and the face was so clearly Senjuro’s despite his eyes having a black sclera and his iris and pupil becoming cat like, the pillars had all turned to see if the flame pillar was alright and he could hear Himejima mutter prayers and Mitsuri was on the verge of tears seeing Senjuro alive but as a demon

- He found himself going into denial until Tanjiro, who had been freed as Obanai left to comfort the distressed love pillar, ran and yelled Senjuro’s name and told him to resist his hunger

- “My sister and the other demon with us are different! They would never eat a human!”

- Senjuro was a good kid, he was innocent, kind and a bit on the timid side. He had helped raise him, he knew Senjuro would never want to harrm a fellow human even when threatened.

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