Tanjiro is the half brother of Kyojuro and Senjuro. After his brother beings training him, he's swept into a game of kill or be killed. This will not follow the plot because I'm a lazy jackass who cant write action scenes.
Tanjiro x Shinobu
As Kagiya Ubuyashiki laid on his futon mattress, his wife sought to his illness by feeding him tea mixed with medicine. As Amane fed her husband. she saw a dark figure emerge from thin air. Immediately she threw a knife at the figure but it caught the weapon. "Is that you, Tanjiro-kun?" Kagiya called. "Yes sir."
"I assume you got my message. Sorry for calling you out so late but I need a progress report in your endeavours." He attested softly. "I live to serve. And my lady, that was a nice throw."
"Thank you."
"Anyway. I've taken aside to lowest performing Demon Slayers and put them through my personal training regiment. Soon, I will let them teach the others. This way, my knowledge will get passed down in my absence." Tanjiro noted. "And your demon reserves?"
"I currently hold 123 servants ready for battle. I do occasionally let them out at night in groups of 5." He answered. "Good. What's your plan of action?"
"Doma stole notes from Muzan along with his own research. Muzan has several research facilities scattered through the countryside. The Demons are getting smarter and hunting in pacts. Not too long ago I stumbled into one of their traps."
Amane gasped, "They're making traps now?"
"More and more of them are regaining consciousness and critical thinking. Muzan has answered my call for war and I do believe this is his sign."
Kagiya sighed with a smile, "Tanjiro-Kun."
"Yes, master?"
"What do you hold in your left hand."
"A death knell."
"What do you hold in your right?"
"A mallet, to ring the death knell."
"And so it has been rung. Muzan's death is upon us. I can feel it. Now, I have a task for you."
"Sir?"
"I have a demon friend. She's a doctor named Tamayo. I have enlisted her help in creating a demon cure. Find her. She's in the XXX district. This necklace has her scent." He said, handing the young man an engraved necklace.
"Consider it done."
"Good. Thank you... Commander Kamado."
Tanjiro departed and rested and decided to get some rest first. The next night, he pondered upon who to take. He needed someone quiet, someone, with great senses.
As he wandered aimlessly around the Mansion, he saw 3 young maidens fresh from Final Selection, being trained as Kakushi. He walked up to them as they gossip about news in the neighboring town.
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Kiyo is the one with the red belt. Sumi is blue and Naho is green.
"Oi! Rats!" He called. Sumi, Kiyo and Naho perked up. "Yes, Commander!?" They all greeted.
"Wanna go on a mission?"
"Yeah!
"Cool."
The three stood up, dusted themselves and awaited his command when suddenly Aoi showed up. "Hold it! What do you think you're doing?"
"Going on reconnaissance." He answered. "So why are they following you, huh? It's like 5 in the evening!" She shouted. "So? Their big girls now. Girls, how old are you?"
"15!"
"See. Their older than Nezuko when she started Slaying. It's just recon." He shrugged. "Sigh... Carry them back safely!" She commanded. "Mhm. Hey rats, get dressed in your uniforms. I'll be in a tree."
Tanjiro disappeared in smoke like a baller and hid amongst the trees. "Is it just me, or is our brother-in-law a complete badass?" Sumi asked her sisters. "No no. He's a badass." The others responded. They have been from different families, who are now dead, but you may as well call them triplets.
They dressed in their uniforms. As Kakushi in training, they're not required to hide their faces.
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Just replace with Sumi, Nano and Kiyo.
The sun has partially dipped behind the majestic mountains when they exited, dressed in their uniforms. Frankly, they were more reminiscent of Demon Slayer uniforms but they couldn't use breaths as well and others. Funny enough, they know quite alot about the different forms.
"Eh... Where's the Commander?" Naho queried with a deadpan. "Commander! Where are you!" Sumi shouted. "Sumi-chan! You're being loud." Kiyo reprimanded.
"Rat number 2 is right. I should've trained you by now," Tanjiro grimaced. "But I guess that's my fault, ain't it?"
He jumped from a tree and landed silently. "W-well! We know a thing or too!" Naho exclaimed. "Oh?"
Sumi gave a smug expression, "We watched you train when he were kids! Uzui-sama was awesome!"
"Firstly, you're still kids. Second... You watched me train?"
All three: Yeah
Tanjrio thoughts: Hmm. Tengen-sensei wasn't keen on his secrets being exposed. He could hear anything within earshot. And somehow they evaded him? They have potential.
He was shaken from his thoughts by the tugging of his clothing. "Commander, can we go now?" Inquired Kiyo. "Yeah. But I move fast."
