【姉】INTEGRITY ➛ ❝Various! Kny 𝚡 Gn! Isekai! Reader¡! ❞

『Official Meeting-』

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Japanese will be underlined.

[Warning: Spoilers, cursing, violence.]

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[𝐂𝐡𝐚𝐩𝐭𝐞𝐫 40]

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 You and Shoichi had ditched Senjuro and Tanjiro when they decided to search through a ripped up book, attending warm up training with Shoichi's trainer. You had an idea of who the boy had been training under, however you weren't sure. "Mm, Shoichi. Trainer, who?" you'd interrogated, having recognized the foul language that'd been spilling from the boy's lips. While you didn't necessarily care that he was cursing, he was actually going a bit overboard.

"Uhm, he's the wind hashira but I couldn't figure out how to use his breathing technique so we agreed to try and make one of my own. I guess it worked but the events where I got hurt badly are really fuzzy- Oh... You're bad with Japanese, sorry. I forgot-" the boy paused in his rambling, sweatdroping whilst averting his now orange eyes. "Name. Shinazugawa Sanemi. Me, he teach." he'd attempted to translate.

So you happened to be correct in your assumption. Now that you observed your son's appearance, you'd realized how much he changed. You didn't realize the boy saw you as a sibling rather than a parent. Shoichi's hair had grown out and was currently pulled into a short pony-tail, the ends seemingly dyed a bright orange, similar to Nezuko's. Wait, what? Was Shoichi a demon now?

You hurriedly reached forward, taking Shoichi by the jaw and inspecting his teeth, greatly startling the adolescent. His teeth didn't share a resemblance to that of a demon, so why did his appearance change so greatly-

Your eyes went wide in realization. Back then, Shoichi had used a breathing technique you hadn't seen before, ash had flooded the area, it was hard to breath and the temperature was amplified, it was burning hot. You'd passed that off as being from Kyojuro, however it never got that hot when he was fighting Akaza. You'd only gotten a quick glimpse at Shoichi's face as he'd thrown himself in between the two battling men, so quickly that you'd brushed off an important development.

Shoichi had a demon slayer mark at that time.

Gradually releasing the uncomfortable child from your grasp, you further observed his features. "Shoichi, breathing technique you make, called?" you questioned in anticipation.

"Uhm, I think I called it Volcanic Breathing..." the boy answered whilst rubbing his mouth, his eyes screwed shut in discomfort, still feeling the sensation of his mouth being pried open.

You pursed your lips, his mark appeared to represent lava or magma of some sort. That would explain his sudden enhanced development, however what could've triggered it?