Demon Slayer: The Journey That Began When I Became Yoriichi's Sister

Yu Zi picked up the booklet on the table, examined it carefully, and fell silent.

"...Is it hard to understand?"

This black blob... oops, this black blob is full of intricate patterns, can't you tell that it's a drawing of hearts and brains?

Yuko admits that her painting skills are a bit lacking, but as her only original work, shouldn't we give her some respect?

How could anyone not understand such an obvious art style?

Everyone: "...What do you think?"

I don’t understand a thing!

What exactly is that thing?

It was a dark blob, like something scribbled on randomly; who could recognize it?

but……

It appears in various parts of the human body... Could it be...?

"Joints?" Giyu Tomioka suddenly asked.

Yuko clutched her chest, giving him a look that said, "I've misjudged you."

I think you'd better not say anything.

Giyu Tomioka's expression remained unchanged, but his heart was completely frozen.

From today—no, from this moment on—he will never speak another word.

Indifference.jpg

Butterfly tilted her head as she examined the booklet, then hesitated and said, "Even if it's called a joint, the location doesn't seem quite right."

Yuko, no longer wanting to hear their analysis, said directly, "It's the brain and the heart."

“But isn’t this number strange?” Tanjiro pointed to the contents of the booklet with a puzzled look. “Judging from the number of these black…black patches, there are probably more than ten.”

"You mean a black blob, right?" Yu Zi retorted expressionlessly, choosing not to delve deeper.

Tanjiro gave an awkward smile and dared not utter a sound.

Yuko explained, "Muzan's physical structure is very different from that of ordinary people. He has a total of 5 brains and 7 hearts."

"These black ones... black spots... black depictions are so clear that you can recognize the heart and brain at a glance, that's it."

Everyone: "..."

Yu Zi blushed slightly: "Anyway, that's the gist of it. I hope you understand."

Kyojuro scratched his head: "I can understand it, but isn't Muzan immortal? Even if you cut off his neck, he won't die. Are his heart and brain considered weaknesses?"

Yuko suddenly realized that what he said made a lot of sense.

Ghosts cannot be weakened by their heart or brain. Even the weakest evil ghost, once transformed into an evil ghost, will not die unless its head is completely severed from its neck.

Not to mention the heart.

If the heart can be considered a weakness, then the most commonly used weapon of the Demon Slayer Corps members should not be swords, but guns.

Because stabbing attacks cannot provide an effective means of attack against demons, slashing weapons like swords have become standard issue weapons for the Demon Slayer Corps.

But Muzan is the Demon King, so there must be something wrong with him having so many hearts and brains, right?

“This is probably what you call a weakness that can’t be considered a weakness.” Yuko paused for a moment and explained, “Yoichi, the swordsman who started breathing, once severed Muzan’s neck along with his five brains and seven hearts in an instant.”

"Although we failed to kill him, we did manage to weaken him."

Yuko speculated that the loss of these vital organs would leave Muzan in a weakened state.

Uzui Tengen stared blankly: "In an instant... he severed Muzan's neck..."

Tanjiro: "Including the five brains..."

Sanemi Shinazugawa: "Seven hearts..."

The crowd shouted in unison, "Slash them all at once?"

Kyojuro laughed heartily: "That swordsman who started breathing is truly amazing."

Yuzui Tengen shook his head rapidly: "No, no, no, that's not about how powerful it is anymore, is it?"

He turned to Yuko for confirmation: "Muzan is very powerful, right?"

Yuko nodded.

"They were already very capable hundreds of years ago, right?"

Yuko nodded again.

"You can't beat Muzan, right?"

Yuko hesitated before nodding, "It's not that I can't beat them, it's just that I can't cut them down..."

"That means we can't beat them."

Ikuko: "..."

Uzui Tengen said in an exaggerated tone, "Hey, just how powerful do you have to be to kill Muzan in an instant?"

Yu Zi paused for a moment, then thought, "Why does this sound so enjoyable?"

They weren't praising her at all.

And... Yoriichi can't hear it either!

Yuko couldn't help but say, "Yoichi was born with the mark and the Transparent World; even Muzan would call him a monster."

Everyone: "I thought Tokito was invincible, but I didn't expect there to be someone even more valiant than him."

Yuko rolled her eyes, speechless.

Tokito could be compared to others, even to his ancestor Kokushibo, but compared to Yoriichi… she felt that no matter who he was compared to Yoriichi, they were all too pathetic.

"You know Upper Moon One, right? My other older brother." Yuko suddenly became interested and started rambling on. "Back then, I wanted to become a demon because I was jealous of Yoriichi's talent and power, so I wanted to have unlimited time to surpass Yoriichi."

"The result is obvious: even if he had hundreds of years more to train, he would still be incredibly bad."

Someone fell silent: "Food?"

Uzui Tengen, who had previously fought Kokushibo head-on, twitched his lips and said, "If that monster is weak, then what are we?"

Yu Zi blurted out instinctively, "Useless."

As soon as she said it, she realized she had misspoke and quickly corrected herself: "No, I was just kidding. What I meant was that Kokushibo is actually talented too, just not as much as Yoriichi..."

"Stop talking," Yuzui Tengen said, covering his face in pain.

Yu Zi smiled somewhat awkwardly: "Practicing for several hundred more years will definitely lead to improvement. At least that guy wasn't this strong when he was still human."

A glimmer of hope rose in Uzui Tengen's heart, and he looked at Yuuko expectantly: "How do you compare to us?"

“Um…” Yu Zi’s expression was subtle for a moment. She looked at the ceiling and said against her will, “Bad, about the same.”

At least she felt that Iwaju was no worse than Iwakatsu.

Hmm...maybe it's because they both have the surname Yan?

Everyone: ...His words are written all over his face.

He looked very unwilling.

So your whole family are monsters, and even the least talented among them can't see their backs.

Yu Zi coughed twice and changed the subject: "As it turns out, even a pile of shit can't turn into gold after a hundred years."

Everyone: Although we know she wasn't talking about us, we still have a feeling that she's being alluded to.

Shinobu Kocho couldn't help but chuckle to herself as she looked at the expressions on everyone's faces, which resembled those of someone who had just eaten excrement.

But as she laughed, her expression suddenly darkened, as if she were the worst one...

Yuko steered the conversation back on track: "In short, Muzan is a demon who has overcome his weakness in the neck and can only be destroyed by sunlight. Yoriichi has already verified this."

Everyone nodded.

If it weren't for the information about Muzan's ability to survive being decapitated, they would have found it hard to believe that Muzan could actually survive being decapitated.

Only Kagaya Ubuyashiki remained calm, his expression as serene as ever. He had already considered this before Ikuko even joined the Demon Slayer Corps.