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

If demons can truly be awakened by emotions, then what kind of philosophy has the Demon Slayer Corps been fighting with all these years?

Those evil spirits they mercilessly slaughtered clearly had the opportunity to regain their sanity.

Shinobu Kocho's worldview almost collapsed.

The struggling demon suddenly lunged at Yae, but Yuuko pulled it back, took off her cloak, tore it into strips, and bound it tightly.

The other person is still hungry and has exhausted a lot of energy, so it won't be easy for them to break free of the rope.

Besides, aren't they watching over things?

Yuko looked at Yae and explained, "He can't maintain his rationality for long, so we have to control him for now."

How could Yae possibly have any complaints?

Suddenly, a flapping sound came from the treetops overhead.

Yuko looked up and saw a jay with a small purple scarf around its neck perched on a treetop.

Shinobu Kocho exclaimed in surprise, "It's the Lord's Kasugai Crow!"

"Nice to meet you, Ms. Yuko."

"I am Kagaya Ubuyashiki's messenger."

"Y-you...hello." Yuko felt a chill run down her spine. What was with that raven's voice?

She inexplicably felt a powerful sense of oppression.

"I have learned of your request from Giyu. The Demon Slayer Corps is honored to welcome you."

Kasugai Crow turned its head and said, "Mr. Tomioka, Ms. Butterfly, please take this demon back to the Demon Slayer Corps."

The two were slightly taken aback, then nodded in agreement.

There is no one in the Demon Slayer Corps who does not respect this lord.

His will is the will of the Demon Slayer Corps.

The raven flapped its wings and flew away, while Shinobu Kocho glanced at Ikuko with a complicated expression.

"Let's go back."

……

A base of the Demon Slayer Corps.

Because of their past experience of being massacred by Muzan Kibutsuji, the Ubuyashiki clan's territory has become unpredictable and treacherous, making it impossible for even the Pillars to know the true location of important sites.

Muzan possesses the ability to sense the location of demons, so it took some effort to settle Yae's father.

The evil spirit was placed in a secluded room, its limbs were bound, and the room was surrounded by wisteria flowers.

After reminding Yae to call out to her father frequently, Yuko followed Shinobu Kocho to meet Ubuyashiki.

After bringing Ikuko there, Shinobu Kocho left at Ubuyashiki's signal.

"Nice to meet you, I am Kagaya Ubuyashiki."

The boy, with terrible, ugly markings on his head, introduced himself with a gentle expression.

The strange markings on his face are a curse that the Ubuyashiki family has been unable to eradicate for thousands of years.

Yu Zi already knew about this during the Warring States period.

This curse comes from the heavens, because the existence that brings sorrow to this world is called 'demon'. The Demon King, Muzan Kibutsuji, is from the Ubuyashiki family.

It can be traced back to the Heian period.

Since then, boys born to the Ubuyashiki family have been plagued by illnesses and died young, with almost no one living past their twenties. Girls also need to remarry and change their surname to avoid the curse.

In Yuko's opinion, this curse was utter nonsense.

It's just that God has completely lost his mind.

The Ubuyashiki clan has never enjoyed any benefits brought about by Muzan, yet they have to endure this curse that has lasted for thousands of years.

Just because a scoundrel came from the clan?

It's one thing for feudal dynasties to carry out the practice of exterminating nine generations of a family, but it's another thing for God to do the same. What kind of god would have such a barren mind, knowing nothing but tormenting people?

"I am Kagaya's wife, Ubuyashiki Amane." Beside her, a woman with long, snow-white hair nodded slightly.

Yuko removed her straw hat and untied the white cloth: "I am Tsugikuni Yuko, the younger sister of the Beginning Breathing Swordsman."

Seeing the marks on her cheeks, Ubuyashiki Amane was stunned for a moment.

But after listening to Yuko's words...

……

The atmosphere fell silent instantly.

The two: Was she referring to future generations?

"I am a ghost."

The two looked up at the bright sun overhead.

……

The atmosphere remained silent.

Yu Zi's wine-red hair instantly turned white, and hideous demon horns emerged from the top of her head.

Ubuyashiki Amane almost instinctively stepped in front of her husband.

Noticing his wife's unusual behavior, Kagaya Ubuyashiki asked, "What's wrong, Amane?"

Because of the curse, his eyesight has deteriorated to the point where he can barely see.

Ubuyashiki Amane did not reply immediately, but looked at Ikuko with disbelief.

Daytime? Impossible!

Yu Zi calmed her breathing and soon returned to normal.

Seeing that she showed no aggressive intent, Ubuyashiki Amane calmed down her surprise.

“She…Miss Yuko just…turned into a demon.”

Although Kagaya Ubuyashiki had vaguely sensed his wife's unusual behavior earlier, he was still surprised to hear her say this.

"Have you overcome the sun?"

"And...he broke free from Muzan's control."

It's so much easier to talk to smart people; Kagaya Ubuyashiki quickly understood and accepted Ikuko's situation.

Yuuko nodded kindly to Ubuyashiki Amane and explained, "I am the swordsman who created the Initial Breathing technique during the Sengoku period, and the younger sister of Yoriichi Tsugikuni..."

She briefly described her experience of becoming a ghost.

Even Kagaya Ubuyashiki was momentarily stunned after hearing Yuko's story.

After the massacres by Muzan and Kokushibo, very little of the Ubuyashiki family's possessions have survived.

Only after hearing these secrets can one truly understand the origins of breathing techniques.

"Before my brother died, I made a promise to him to kill Muzan, so... I am here."

"To provide the Demon Slayer Corps with the assistance needed to defeat Muzan."

Yu Zi let out a long breath. She had been holding these words in for many years, and letting them out made her feel much lighter.

Kagaya Ubuyashiki quickly processed the information and asked seriously, "Why did you choose this era, Ms. Ikuko?"

Demons have endless lifespans, even though most of the Demon Slayer Corps swordsmen joined with the belief that they would kill Muzan.

However, it cannot be denied that even Kagaya Ubuyashiki himself would not dare to say that he could end Muzan in his generation.

Why would Ms. Yuuko, who has never had any contact with the Demon Slayer Corps, stand in front of him?

"The Breath of the Sun, the swordsman who can master the Breath of the Sun, is in this era."

"...Start breathing?" Kagaya Ubuyashiki was slightly moved.

"Moreover, the Pillars of this era are all very strong, and I believe they have the potential to kill Muzan."

After all, that's how it is in anime.

It is hailed as being no less powerful than the first Taisho Nine Pillars.

In Yuko's view, the reason why the first generation of Pillars were so strong was largely due to Yoriichi's influence.

Kagaya Ubuyashiki smiled slightly: "Those kids... I'm very proud of them."

"Then I'll stay here and welcome Miss Yuko on their behalf."

Having greeted Kagaya Ubuyashiki, Ikuko accepted his invitation to stay temporarily at his residence.

As she went outside, she saw a petite figure standing against the wall not far away; Shinobu Kocho had not left.

With a faint smile, Shinobu Kocho stepped forward and asked, "Miss Yuuko, do you have a moment?"

"Yes, yes..."

Shinobu's eyes gleamed: "I would like to express my gratitude to you for saving my elder sister two years ago. Please do me the honor of visiting the Butterfly Mansion for a chat."

Yu Zi hesitated for a moment, then nodded slightly.