Breathing in as much as possible, making the surrounding atmosphere fizzle as if in an electromagnetic field.
El immediately increased the output of muscle power expenditure and oxygen in the blood vessels inside, then stacked them consecutively, eight times. "Hekireki Issen: Rokuren."
Crasshing!
With a sound of the sky crashed with a violent thunder, shaking the ground beneath us, El moved with blinding speed.
El's movements continued to increase significantly. The air around El continued to vibrate and hiss frighteningly.
Slash! Slash! Slash!
In one precise and precise swing, El cut through the surface of the living flesh around her, and disrupted the regeneration process of the red tentacles.
This time, the pain Enmu felt as a result of El's slash was as if the surface of his flesh and skin had been subjected to a high voltage electric shock.
"Gyaaaa!" No doubt, Enmu's scream was louder than ever, the vibrations in every carriage containing the living flesh that came from his echoing even more.
After slashing the surface of the surrounding living flesh, in order to slow down the regeneration process, El then moved towards the front carriage to give Zenitsu, Nezuko and Tanjiro instructions.
When meeting with Zenitsu who was in sleep mode and Nezuko, El said something similar to what he had said to Inosuke, but with a slight modification.
Firmly, El gave important instructions to Nezuko and Zenitsu as they fought against Enmu and protected the sleeping passengers.
Zenitsu and Nezuko were responsible for protecting the passengers in the front three cars, while El herself would take care of the back five Carriages.
Nezuko nodded with a funny-sounding growl. While Zenitsu was silent, because Zenitsu was in sleep mode. In other words, Zenitsu was experiencing Sleep Walker, in a cooler and braver version.
El was very trusting of them, even though Nezuko was a demon and Zenitsu tended to be timid. Zenitsu, in his sleeping state, used his Thunder Breathing ability to protect the passengers, while Nezuko, with his powers, also played an active role in keeping the people on the train safe.
Finished giving instructions, El moved towards the other front carriage, to direct Tanjiro. This time, El said a few things briefly and clearly.
Almost the same as what Kyojuro had said in the Kimetsu no Yaiba anime, El gave directions to Tanjiro along with Inosuke, going to the front of the train to defeat the demon.
El told Tanjiro to focus on finding the demon and cut the neck that had merged with the train. El asked Tanjiro to coordinate with Inosuke in attacking the demon.
Zenitsu and Nezuko will take care of the three front cars of the train. While El would take care of the back five cars while looking for weak points.
"Do you understand, Tanjiro?" asked El with a serious expression.
"Yes! I got it!" Tanjiro replied quickly.
Turning around, El turned his back to Tanjiro and took in as much breath as possible until it burned like fire. "Honō no kokyū."
"Ichi no kata: Shiranui." El ran with incredible speed, the visual of fire seemingly created around his as he left Tanjiro.
Tanjiro was shocked and impressed, but with that he finally understood where the previous shaking had come from. The shaking came from El's incredible movement.
"There's no time to be impressed you idiot. Hurry up and do what you can!" Tanjiro rushed towards the front carriage while slashing at the few lumps of living flesh around him.
In his mind, Tanjiro said. 'This demonic scent is getting thicker and stronger. Hurry up, I have to hurry!'
"Inosuke, where are you!" said Tanjiro in a loud tone of voice while running.
"Shut up, I'll kill you!"
Suddenly, Tanjiro heard a loud voice with Inosuke's harsh tone. From the origin of the voice, it came from the top of the train. "Upstairs!" Tanjiro was a little surprised to find Inosuke running on top of the train car.
On the roof of the train, Inosuke seemed to be running with all his might. In his mind, Inosuke imagined the figure of El wearing an eye patch.
With a look of annoyance, mixed with admiration, Inosuke said, "That one-eyed one just interfered. But, somehow... Somehow it's so cool! It's annoying!"
"Inosuke!" said Tanjiro loudly.
"Watch the front three carriage" Tanjiro shouted from inside the carriage, reminding Inosuke of the instructions given by El.
"I know!" Inosuke replied in a loud voice from the top of the carriage.
"And I'll find it right away!" Inosuke spread his arms as he ran. With divided focus, Inosuke used the Breathing Style.
Before long, Inosuke had found Enmu's weak point. "This creature has one weak point somewhere!"
"I see! Then I guessed it!" Tanjiro eyed with a loud tone of voice. "Is it in the front?"
"Yes, in front! What's clear is that the front feels really disgusting!" replied Inosuke from the top of the carriage as he continued to run.
Tanjiro was lost in thought for a moment. Tanjiro corrected his sense of smell which had become rather useless as the demonic scent in the air was blown away by the truth of Inosuke's extraordinary sense of taste.
"I got it!" said Tanjiro with confidence. "Is it in the coal carriage?" asked Tanjiro, correcting his guess.
"Yes, in the coal car!" replied Inosuke as he focused his gaze.
With confidence, Tanjiro said, "Inosuke, remember! Uncle Adrian said we must find the demon's weak spot and stop it. We can do it together, Inosuke!"
"Yes! I, Inosuke-sama, will lead the way! No one can stop me, let alone this monster!" said Inosuke with passion and energy.
From inside the train carriage, Tanjiro ran with all his might while slashing at Enmu's lump of flesh. With a calm and focused look, Tanjiro said. "We must be careful, Inosuke. That demon will definitely not be easy to defeat. But if we work together, we can protect everyone on this train!"
With a bit of stubbornness, Inosuke replied. "Hah! I don't need a warning! But fine, we'll work together. But remember, I'll be the one to deliver the decisive blow! Come on, Zonsuro, let's destroy this monster!"
Tanjiro smiled and prepared, using his water breathing style. "Yes, we can definitely do this together. I'll support you, Inosuke! We must focus and not give up."
Inosuke was still running on the roof of the train. Occasionally, red tentacles would pop up and attack Inosuke. However, Inosuke vigorously cut down all the tentacles.
...
In the rearmost carriage, El was using an injection to take a sample of Enmu's blood. Since Enmu had already joined the train, it wasn't too difficult for El to take his blood.
"Almost, I forgot." El said after taking Enmu's blood.
Inserting the syringe containing Emnu's blood into the space storage ring, El then looked at the red tentacles that had regenerated. "It regenerates quickly too."
"Oh yeah, I forgot, I have a breathing style that I really want to try. But, I never got around to using it." El said and recalled the stance.
El drew the sword, revealing the shiny black blade. Standing tall, his left foot slightly stepped forward, his knees bent low and his body ducked down like mist hanging on the ground.
His legs felt light as if they were ready to move at any time with unpredictable speed, reflecting the fluidity of the mist itself.
The hand grasping the sword positioned the blade parallel to the body, slightly lowered, as if to hide the intensity of the upcoming attack.
As El took a deep breath, the air around his seemed to freeze for a moment. A thin vapor escaped from his mouth, mingling with the mist that had begun to coagulate around his.