Kanae Kocho did not immediately agree to become a demon.
Her hesitation was quiet but unmistakable, lingering in the stillness between them. It was not fear that held her back, but attachment threads of humanity she could not so easily sever. Her younger sister, Shinobu Kocho, and the girls of the Butterfly Estate all depended on her. Those bonds weighed heavily on her heart, making the decision far from simple.
Sensing that hesitation, Kokushibo's six eyes narrowed slightly, a faint, knowing smile forming across his face. His voice was calm, yet carried a subtle pressure that struck directly at her beliefs.
"You have always claimed that humans and demons can coexist," he said. "If that is truly what you believe, then why hesitate now? Or is it that even you doubt those words?"
The question was not loud, yet it cut deeper than any blade. Kanae's defenses wavered, and after a brief silence, she let out a soft, self-deprecating smile. There was no anger in her expression only acceptance.
"…You're right," she admitted quietly. "If I cannot even take this step, then my belief means nothing."
Lifting her gaze once more, she steadied herself.
"Very well. I will believe in it… even if I must become a demon to prove it."
Without further hesitation, she accepted the blood Kokushibo offered.
The transformation came swiftly.
Her body trembled as the demonic blood spread through her veins, altering her very existence. Her breathing grew erratic before settling into an unnatural rhythm. When she opened her eyes again, their gentle hue had turned a deep crimson. Her beauty remained unchanged, yet something about her presence had shifted something darker, more dangerous, laced with an unmistakable aura of predation.
Unlike Kokushibo, she did not manifest additional eyes, but there was no mistaking what she had become.
Then the hunger surfaced.
It was immediate and overwhelming, a primal instinct that clawed at her consciousness. Her body trembled as she struggled to maintain control, the realization dawning upon her with terrifying clarity.
She wanted to consume humans.
Kokushibo placed a hand on her shoulder, his tone steady, almost indifferent. "This is the reality of demons. Without consuming humans, your strength will wither. There is no exception."
Kanae bit her lip, her composure wavering. She had believed she could endure it, that her will would be enough but now, even before true hunger had taken hold, the craving gnawed at her relentlessly.
"…So this is what you have endured all this time?" she asked, her voice strained.
Before Kokushibo could respond, a sudden presence broke through the tension.
"Sister…!"
The voice trembled with disbelief.
Shinobu Kocho stood a short distance away, her eyes wide as she took in the scene before her. Her entire body shook as the truth settled in her beloved sister had become a demon.
Kanae's expression faltered. "Shinobu… why are you here?"
But Shinobu did not respond. Her grief and rage had already taken over. Drawing her Nichirin Blade, she charged forward without hesitation, her voice breaking as she shouted, "You're the one who turned my sister into a demon! I'll kill you!"
At this point in time, Shinobu had not yet become a Hashira. Her strength, though remarkable, was far from sufficient to challenge an Upper Rank. To Kokushibo, her attack was little more than that of a child.
He did not even move.
But before the blade could reach him, Kanae stepped forward.
Steel clashed sharply as she intercepted the strike, standing firmly between them.
Kokushibo's gaze flickered with faint surprise, though he made no immediate move to interfere.
"Sister… why?" Shinobu's voice trembled violently, tears streaming down her face. "Why are you protecting him?"
Kanae's heart wavered, but she did not step aside. "Shinobu… listen to me. Go back."
Her voice was gentle, yet firm, though her own thoughts were in disarray. She had not expected her choice to unfold like this but now that it had, she refused to regret it. Even as a demon, she would cling to her belief.
Yet Shinobu had already broken down. The image of her sister that she cherished shattered completely, leaving her lost and helpless.
Seeing the situation spiral, Kokushibo stepped forward, pulling Kanae behind him. His patience had its limits. With a single motion, he drew his blade.
Moon Breathing, First Form: Dark Moon • Evening Palace.
The strike was precise and controlled, landing just before Shinobu. The sheer force alone sent her collapsing backward in terror, her body trembling uncontrollably.
"I spared you," Kokushibo said coldly. "Take it as a warning."
Kanae instinctively moved to help her sister, but Kokushibo stopped her. The moment hung heavy, but Shinobu did not flee. Instead, she cried out even more desperately, her voice filled with raw emotion.
"Sister… don't go… please come back…!"
She lay on the ground like a child abandoned, reaching out helplessly.
For a brief moment, even Kokushibo hesitated. Then he exhaled quietly.
"…Go. Say your farewell."
Kanae nodded.
She knelt beside Shinobu, just as she had done countless times before, gently brushing the dirt from her clothes. Her touch was unchanged, painfully familiar.
"Shinobu," she said softly, "I chose this path so that humans and demons might one day coexist."
Her smile was faint.
"But I may fail. If that happens… then you must be the one to stop me."
Before Shinobu could respond, another presence cut into the moment.
Without warning, Giyu Tomioka appeared, his blade already in motion.
Water Breathing, Fourth Form: Striking Tide.
The rapid succession of slashes surged toward Kokushibo, but each strike was effortlessly deflected. The difference in their strength was immediate and overwhelming.
Giyu's expression changed sharply as he realized the disparity.
In the next instant, crescent-shaped slashes erupted outward. He was thrown back, his body marked by multiple precise wounds, forced to his knees.
The fragile calm shattered completely.
Recognizing the danger of prolonging the situation, Kokushibo turned away. There was no reason to continue.
"Enough," he said flatly. "We're leaving."
Kanae rose slowly. Without turning back immediately, she removed her haori and placed it gently in front of Shinobu.
"Shinobu… live on."
Then she stepped away, joining Kokushibo without hesitation, ignoring the desperate cries behind her.
Giyu, still recovering, could only watch in silence, unable to fully comprehend what had transpired.
After a moment, he forced himself to stand and approached Shinobu, gently placing a hand on her shoulder.
"…What happened?"
The question, though simple, broke what little composure she had left, and she collapsed into tears once more.
Giyu stood there, completely at a loss.
The news spread quickly through the Demon Slayer Corps, shaking its very foundation.
The fall of the Flower Hashira was not something easily accepted.
Gyomei Himejima clasped his hands together, tears streaming down his face as he murmured prayers for her.
Sanemi Shinazugawa reacted with fury, his eyes filled with killing intent as he declared he would personally end her life should they meet again.
Tengen Uzui sighed, clearly dissatisfied. "How unflashy… for a Hashira to fall like this."
Giyu remained silent, his thoughts unreadable.
Meanwhile, the position of Flame Hashira stood vacant. Kyojuro Rengoku was still in training, while Kagaya Ubuyashiki had already accepted Makijuro Rengoku's withdrawal from active duty though his reasoning remained questionable.
Kagaya raised his hand gently, bringing the discussion to a close.
"That is enough."
His voice was soft, yet carried authority.
"We mourn Kanae… but there is still much to do. Shinobu will need support."
His gaze shifted.
"Tomioka… stay by her side."
Giyu froze slightly, clearly uncertain, but he did not refuse.
"…Yes."
Kagaya watched quietly, a faint weariness in his eyes. There were many things beyond his control, yet he could not allow himself to falter.
"Gyomei," he said softly, "come with me."
His health was deteriorating, and time was no longer on his side. Still, he continued to move forward seeking hope where he could, even as the world around him grew darker.
The war had not changed.
But something within it had begun to shift.