Mr. Cheng Mo bypassed Himura Senichi's rigid body and quickly arrived at the unconscious Ruri's side.
His movements were swift and precise, his hands quickly touching and examining several key areas on her torso and limbs.
"Multiple rib fractures, humerus fracture in the left arm, tibia and fibula fractures on the right side, accompanied by internal bleeding..."
Mr. Cheng Mo calmly assessed the injuries, his hands never stopping.
With a few extremely faint but teeth-grinding 'clicks,' Mr. Cheng Mo skillfully reset her several obvious displaced fractures.
Then, he picked up a shattered wooden board nearby, smoothed it, and used bandages to quickly secure the girl's body.
During this process, a faint wisp of Chakra attached to his fingertips, carefully probing into Ruri's body.
The Chakra gently stimulated her nearly depleted cell activity, strengthened her cardiopulmonary function, and applied temporary energy pressure to stop bleeding in the internal organs.
After completing all this, he took out more bandages and medicinal powder for external bandaging.
Although Himura Senichi's body was unable to move, his crimson eyes remained fixed on Mr. Cheng Mo's actions.
When he felt his daughter's breath, which had been as weak as a flickering candle in the wind, miraculously become steady and strong under the dangerous man's ministrations... the threatening and angry growl in his throat gradually subsided.
Eventually, he just lay there quietly, though still maintaining his terrifying demonized form.
But that frantic aggression inexplicably quieted down, leaving only a stubborn, silent posture of protection.
After dealing with Ruri's emergency injuries, Mr. Cheng Mo finally turned his full attention to the now quiet Himura Senichi.
In his eyes, a faint golden glow silently swirled.
The Eye of Truth was fully activated, meticulously observing the condition within the other party's body.
The situation was more complex than he had anticipated, and also... more interesting.
Muzan's demon blood was rampant and chaotic, furiously eroding and assimilating Himura Senichi's original human tissues.
The demon blood released endless hunger and destructive urges, attempting to completely transform him into a monster capable only of slaughter and feeding.
But at the same time, an extremely strong, incredibly resilient energy was stubbornly erupting from the depths of his brain, which was almost completely devoured by the demon blood!
This energy was not ethereal; it was tangibly integrated into his flesh and blood, forming a peculiar barrier that fiercely resisted the demon blood's erosion.
It was even... attempting to, in turn, influence and guide those rampant Xenomorph energies, making them less destructive!
"Is it due to his strong protective obsession for his daughter? Or..." Mr. Cheng Mo mused.
He immediately thought of his series of interventions, such as saving Nezuko, slaying a Lower Moon, and even directly confronting Muzan.
The world's trajectory might truly have begun to deviate.
Muzan might have accelerated his insane and cruel experimental process because of this, attempting to create more powerful pawns.
And this Himura Senichi, before him, might be an "unexpected product" resulting from the interaction between this accelerated experiment and some kind of world correction force.
A special case who, in the early stages of transformation, temporarily resisted the complete erosion of demon blood with an extraordinary human will!
Unlike Nezuko, who completely suppressed her appetite and fell into a deep sleep, he relied on strong obsession to remain conscious and even tried to influence the demon blood in reverse.
This was a more active and difficult struggle and resistance.
Just then, accompanied by hurried footsteps, several Kakushi Squad Members wearing masks finally arrived at the scene.
They gasped at the horrific state of the scene and the Flame Pillar's injuries, but immediately began to act with practiced efficiency.
"Mr. Cheng Mo! Tanjiro-kun!"
The leading Kakushi Squad Member saluted respectfully.
Although Kyoujurou Rengoku and Himura Ruri's injuries were stabilized by Mr. Cheng Mo's emergency treatment, they were still not optimistic.
They had to be immediately sent to the Butterfly Mansion, which had more complete medical facilities, for further treatment.
Although Tanjirou was also injured by the previous shockwave and coughed up blood,
his physique was far stronger than his peers due to Mr. Cheng Mo's inhuman physical training and medicinal meals. His internal organs only suffered a slight concussion and were not seriously damaged, only requiring rest to recover.
Mr. Cheng Mo's calm voice rang out, quickly directing the Kakushi Squad Members, "Mr. Rengoku has a penetrating wound to his left shoulder, multiple rib fractures, and internal organ concussion. Be sure to keep his body straight when moving him. That girl has injuries to her cervical spine and chest. Use a neck brace, move her as a whole, and be gentle."
The members immediately complied, carefully placing Kyoujurou Rengoku and Himura Ruri onto stretchers.
Though weak, Kyoujurou still loudly reassured the members, "Don't worry, I'm not dead yet!"
One Kakushi Squad Member looked at Himura Senichi, who was paralyzed and rigid from Mr. Cheng Mo's lightning, especially his obvious demonized features.
He subconsciously tightened his nichirin blade and asked nervously, "Mr. Cheng Mo, shouldn't this demon be executed immediately?"
Mr. Cheng Mo's gaze swept over Himura Senichi's blood-red eyes, which were still fixed on his daughter's direction, and he said lightly, "He is temporarily useful, an important research sample, and I will personally supervise him."
With that, he flicked a few more subtle tendrils of lightning from his fingertips, precisely embedding them into several areas of Himura Senichi's head, causing him to fall into a deep coma and completely lose his ability to move.
Only then did he allow the Kakushi Squad Members to carefully lift him onto a specially made restraint stretcher.
With the help of the Demon Slayer Corps' efficient and secretive transportation network, everyone traveled day and night, finally returning to the Butterfly Mansion within a day.
"Mr. Cheng Mo, Tanjiro-kun, this is...?"
Kochou Shinobu, having received the news, was waiting at the entrance. Seeing Kyoujurou Rengoku and another severely injured, unfamiliar girl being carried down, her characteristic gentle smile was immediately replaced by a serious expression.
And when her gaze fell upon Himura Senichi, who was carried down last, bound by lightning restraints and emitting a distinct demonic aura, the smile on her face vanished instantly.
A hint of undisguised disgust and coldness flashed in her amethyst-like eyes.
"Miss Kochou, the situation is like this..." Tanjirou quickly stepped forward and briefly explained what had happened.
He particularly described Himura Senichi's abnormal behavior of desperately protecting his daughter even after becoming a demon.
Kochou Shinobu listened, her brows furrowing tighter and tighter.
Because of her elder sister Kochou Kanae's death, her hatred for demons was ingrained in her bones.
But hearing that Himura Senichi had not harmed anyone, but instead protected a human, this unprecedented situation plunged her into a huge contradiction.
"I understand. Since it's a special case... let's keep him for observation first. However, this matter still needs further discussion."
She looked at Mr. Cheng Mo, her tone serious.
Himura Senichi was immediately sent to the highest-grade isolation ward in the Butterfly Mansion.
It not only had the traditional wisteria flower barrier but also a large number of anesthetic injection devices and the lightning restraints personally applied by Mr. Cheng Mo, ensuring absolute safety.
However, shortly after settling in, Himura Ruri's condition suddenly worsened, with internal re-bleeding and rapidly declining vital signs.
"Prepare for surgery!" Kochou Shinobu's expression changed, and she immediately gave the order.
Mr. Cheng Mo followed into the operating room without hesitation.
Under the shadowless lamp, Mr. Cheng Mo displayed a level of efficiency that even Kochou Shinobu marveled at.
Strict aseptic procedures, extremely precise anatomical positioning, tissue-minimizing dissection techniques, and subtle hemostasis and vitality stimulation using Chakra... every step far exceeded the medical standards of this era.
It carried a cold, instrument-like precision and beauty.
Kochou Shinobu assisted at the side, her purple eyes shining brightly, occasionally asking in a low voice about the principles of certain treatment methods, to which Mr. Cheng Mo answered concisely.
This emergency surgery even became a form of medical exchange.
During this time, looking at the critically ill girl on the operating table, and then thinking of her father outside, who had become a demon due to Muzan,
Kochou Shinobu, while skillfully handing surgical instruments, couldn't help but sigh softly, bringing up an old topic again:
"Teacher Cheng Mo, the risks of researching demons are truly too great... I know his situation is special, but ultimately... it would be safer to wait for the Ubuyashiki Lord's judgment on this matter."
Mr. Cheng Mo, focused on suturing, didn't pause for a moment, nor did he look up.
But the sound of his voice carried a kind of unprecedented coldness that Kochou Shinobu had never heard before:
"You've misunderstood something, Shinobu."
Kochou Shinobu was slightly startled.
Although she had repeatedly told Mr. Cheng Mo that he could call her by her given name, this was the first time Mr. Cheng Mo had called her name so formally and coldly.
"The Ubuyashiki family head might agree, or might object."
"But to me, that doesn't matter."
"Leaving him is my will."
The cold tone seemed to make the air in the operating room congeal slightly.
Kochou Shinobu's hand, which was delivering instruments, paused slightly, and the smile on her face finally completely vanished.
For the first time, she so clearly felt the hidden strength and ruthlessness deep within this man, who usually seemed so calm—a determination that, once made, no one could change.
She was silent for a moment, her expression returning to her usual gentle smile, but with an added seriousness and... awe in her eyes.
She bowed slightly and said in a serious tone, "I understand, Teacher Cheng Mo."
This was her attitude.
She acknowledged Mr. Cheng Mo's decision and reaffirmed her stance of viewing Mr. Cheng Mo as her "teacher."