Reincarnation as Lower Rank Five in Demon Slayer

In the Infinite Castle, Tanjuro's surroundings shifted, and he found himself in a field filled with pillars one meter in diameter.

A figure stood in the center of the arena, holding a knife, like an unmoving stone statue.

"You've finally arrived, successor of the Sun Breathing. Our unfinished battle can now continue."

Kokushibo turned to look at Tanjuro and spoke, his eyes filled with fighting spirit, looking at Tanjuro as if he wanted to devour him.

Kokushibo, the Upper Moon One of the Twelve Demon Moons, was a monster with superb swordsmanship and the strongest demon under Muzan's command. Countless Pillars died by his blade.

After adjusting his breathing, Tanjuro's mind was filled with various information about Kokushibo: the time he turned into a demon was unknown, his blood demon arts were unknown, and his personality was unknown.

Tanjuro's only information about Kokushibo was what he remembered from their previous encounters.

"Stop talking nonsense. You degenerate into a vengeful ghost who harms others. You are not worthy to speak to me."

As Tanjuro spoke, he drew the Nichirin Blade that the Demon Slayer Corps's Swordsmith Village had specially made for him and charged toward Kokushibo.

……

In the Infinite Castle, in a scene filled with lotus ponds, the Upper Moon Two child model sits in the middle of a frozen pond, eating blood-stained snacks while waiting for his opponent to claim them.

"I wonder how many pillars I'll be fighting later, and whether any of them are young and pretty girls. Just thinking about it makes me so hungry."

A clanging sound of a zither drifted out, just as the child model was lost in thought. Suddenly, two figures appeared beside the frozen lotus pond where the child model stood.

"Hanahashira, be careful. This demon is not simple. He is probably one of the strongest Upper Moon demons."

The rock pillar, who had suddenly arrived at a new location due to a spatial shift, immediately spoke to Kanae beside him the moment he noticed the child model's presence.

"Teacher, don't worry. I've encountered this guy before; he's Upper Moon Two. He's very strong. His Blood Demon Art can create ice of varying sizes, and the ice mist he creates is very effective against Breathing Techniques. You and I must be careful and not let our guard down."

The moment Kanae saw the child model, she immediately told Iwahashi about the child model's skills and Blood Demon Art.

"Oh—isn't this the beauty who escaped from my grasp last time? I was so sad for a while because I couldn't have you last time."

"By the way, where's Lei, the little lover I rescued? Where did he go?"

"Because of his defection, I was severely scolded by Lord Muzan. Thinking back to that time, I still feel choked up."

The child model had a big smile on her face, chatting away as if she had met a good friend.

Faced with the child model's friendly and familiar question, Kanae remained silent. She and Iwahashi formed a pincer movement, preparing to quickly defeat the child model, who was Upper Moon Two, so that they could help the others.

……

Giyu the Water Pillar, Kyojuro Rengoku the Flame Pillar, and Shinazugawa the Wind Pillar were teleported to a spacious martial arts room. The room's owner, Upper Moon Three Akaza, stood opposite them with his fist clenched, awaiting their challenge.

"Very good! The three of you are very strong. As strong individuals, you are worthy of making me use my full strength."

Akaza clenched his fists, positioned himself with his legs one in front of the other, and assumed a fighting stance, with a huge pale blue snowflake pattern unfolding beneath his feet.

-

In the constantly shifting rooms of the Infinite Castle, hundreds of bizarre demons, possessing Lower Moon strength in addition to their Blood Demon Arts, are attacking the remaining Serpent Pillar, Love Pillar, and Sound Pillar, along with the Upper Moon Four siblings and Kaigaku, who has just become the Sixth Admiral.

"Lord Muzan will reward those who kill the Pillars of the Demon Slayer Corps handsomely. Those who perform well will be rewarded with his precious blood, making them Upper Moons of the Twelve Demon Moons."

Daki stood beside her brother, Fukutaro, and said.

The great battle between the Demon Slayer Corps and the demons was about to erupt, while Muzan hid somewhere in the Infinity Castle, breaking down the countless mixed toxins within his body.

On an ordinary path in the Infinite City, two transparent figures, a man and a woman, looked around as if searching for something.

"Lord Zhu Shi, is this the direction?"

Yushiro asked the beautiful figure beside him.

"Hmm—based on the music and the movement of the Infinite Castle, the demon controlling this place is in this direction. Yushiro, let's go."

Having located the controller of this space, Zhu Shi led Yushiro toward the location of the space's master, Nakime.

"Hey—look what I found, two little mice that sneaked into the Infinite City."

Li Lei, who also possesses numerous Blood Demon Arts that grant invisibility, quietly followed Zhu Shi and her little follower after discovering them, wanting to see what they were up to.