Luckily, he was a Puppet Master, and his specialty was creating Puppets.
Using the method of creating Puppets to manufacture these devices was feasible, as long as he knew the required functions and corresponding principles. He could replicate them.
He was just missing some of the necessary materials, but substitutes could be found. At most, the resulting devices would be larger and more expensive to produce.
With Transparent World combined with the highest inheritance of Sand Village's Puppetry, his precision in controlling tools with Chakra Threads was comparable to that of top-tier 21st-century equipment. He could also produce other related devices.
The need for lightweight, high-strength materials like carbon fiber for manufacturing centrifuges and similar equipment was not an issue. He only needed to infuse them with Chakra when in use, just like with ninja tools, to temporarily boost their strength. Even if they broke after one use, it didn't matter.
And some chips didn't need to be manufactured. On one hand, his own brain, combined with Chakra Threads, served as an integrated replacement for chips. On the other hand, even Qingshui couldn't manually produce nanoscale chips at the moment.
However, the manufacturing process would be very troublesome. Often, a single piece of glass would require meticulous polishing, and even Qingshui would have to repeat attempts to produce a qualified finished product.
Just as Qingshui was still engrossed in making components, a Kakushi knocked on the door.
"Lord Uesugi, Hayami Shou has returned."
Since the last Hashira Meeting, the Demon Slayer Corps now had two Masters.
One was the current head, Ubuyashiki Kagaya, and the other was the Acting Head, Qingshui.
To distinguish between the two, current Demon Slayer Corps members referred to Qingshui as Lord Uesugi, while Ubuyashiki Kagaya was still referred to as Master, as in the past.
"I understand."
Turning off the buzzing machinery, Qingshui opened the door, nodded slightly to the Kakushi, and walked towards the courtyard.
At the table, Ubuyashiki Amane was tearing strips of cured meat and feeding them to a Kasugai Crow.
This was Ubuyashiki Kagaya's Kasugai Crow, named Suishou. It was the smartest Kasugai Crow in the Demon Slayer Corps, with an intelligence close to that of an adult human. Just by looking at its wise eyes, one could tell this Kasugai Crow was different from the others.
Seven years old, it was in its prime as a crow, with a strong build, smooth feathers, and two sizes larger than other adult Kasugai Crows.
Combined with its ability to speak, like other Kasugai Crows, it was as if this crow had become a spirit.
"Qingshui, you're here. Suishou has found Tamayo's location."
Amane softly said to Qingshui.
Searching for Tamayo was Qingshui's request.
In the original story, Muzan was dragged until dawn and killed. The poison jointly created by Tamayo and Kocho Shinobu played an indispensable role, essentially cutting off a large chunk of Muzan's HP and applying several debuffs.
If Tanjiro was the MVP, then Tamayo was the gold-medal support, with considerable output, and her contribution might not be lower than Tanjiro's.
To defeat Muzan, Tamayo's help was essential.
"Yes, thank you, Amane, Suishou. Tamayo, like Nezuko, is a Demon who broke free from Muzan's control. For centuries, she has secretly opposed Muzan and holds many trump cards. She is a valuable ally worth recruiting."
Qingshui nodded slightly to the person and the crow.
"No need to thank me."
The large crow stood on the stone table, swallowed a strip of cured meat, and looked at Qingshui with sharp, gleaming eyes. It then spoke:
"They demand to meet tomorrow at the agreed location, and no more than three of us can meet them; at most, only one Hashira. Otherwise, they will not appear."
"That's understandable. After all, they are also Demons, so they naturally worry whether our Demon Slayer Corps will try to kill them. I'll just bring one or two people myself tomorrow night."
Qingshui wasn't concerned about his own safety.
Unless he encountered Muzan, even if he faced Kokushibo, Upper Rank One, he might not lose.
Although Tamayo and Yushiro had some tricks, their abilities were more geared towards support and control. They needed to be paired with someone of absolute strength to unleash their full power, and they posed no threat to him.
"Then I'll go with you tomorrow. Your status and mine should be enough to gain their trust. Also, Shinobu recently became pregnant, so you don't need to rush to work on those things at night. Spend more time with her when you have free time."
Amane stood up from the stone stool and advised Qingshui.
"I understand."
Qingshui turned his head and looked in another direction in the courtyard.
Kocho Shinobu was half-reclining on the bed, her lower abdomen slightly bulging. She held a pharmacology book that Qingshui had asked someone to buy from Tokyo Medical University, reading quietly.
She was now pregnant; three months ago, Qingshui had hit the mark on the first try.
Through Transparent World, Qingshui could clearly see the not-yet-distinctly-formed embryo in her womb. It looked like a pair of twins.
The gender couldn't be determined yet; he would have to wait another month or two for the fetuses to show more distinct sexual characteristics.
...
...
The next day, at night, during the Hour of the Boar.
In a bamboo forest on the outskirts of Tokyo.
Qingshui, dressed in a light blue long robe and wearing a blue and white haori, walked into the area.
To his left was Ubuyashiki Amane, holding a golden Nichirin Blade. To his right was the legendary "Road Hashira" Murata – Qingshui brought him mainly to borrow the good luck of this passerby king who could clear Infinity Castle without taking damage.
"Where are they?"
Ubuyashiki Amane looked at the tranquil bamboo forest, her slender fingers gripping the sword hilt, her beautiful eyes constantly scanning her surroundings.
Qingshui swept his gaze around and looked in a certain direction.
"Yushiro, it seems we've been discovered. Dispel your Blood Demon Art."
Tamayo sighed softly and said to the green-haired young man beside her.
"Yes, Lady Tamayo."
Yushiro acknowledged her and dispelled his Blood Demon Art, revealing their forms.
His Blood Demon Art allowed him to make others invisible and briefly affect enemies' minds with illusions for control.
"You are true to your word; only three of you came."
Tamayo and Yushiro emerged from the bamboo grove, observing Qingshui and his two companions.
"A member of the Priest Clan who is marrying into the Ubuyashiki Clan, a regular Demon Slayer Corps member, and a Hashira. You've come on behalf of the Demon Slayer Corps. Do you wish to cooperate with me?"
Tamayo's crimson lips parted as she questioned the trio.
Having lived for centuries, she could easily identify Amane by the patterns on her attire and discern from Qingshui's profound aura that he was a Hashira, and a very strong one at that.
As for Murata…
Well, he looked quite ordinary, and his strength was quite ordinary too.
"You haven't mistaken my identity, but I'm not the one in charge here. He is. And now, he's not just a Hashira anymore; he's the Demon Slayer Corps' true spokesperson."
Tamayo frowned.
It seemed something had happened to the Ubuyashiki Clan.
"Miss Tamayo, I am Uesugi Qingshui, the current Acting Head of the Demon Slayer Corps."
Qingshui stepped forward and introduced himself to Tamayo.
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