Hearing Kokushibou's words, Muzan's eyes narrowed slightly, and ancient memories resurfaced.
Speaking of which, he did know that Kokushibou had a younger sister.
Kokushibou had even begged him for blood on her behalf.
Because she was the younger sister of that monster, Kokushibou's younger sister, he had given her a considerable amount of blood.
It seemed that later, after the transformation, she was too weak and was promptly killed by the Demon Slayer Corps.
He regretted it for a while back then; the younger sister of that monster must have possessed talent no less than Kokushibou's.
Kokushibou's voice was deep: "No... I would not be mistaken."
Muzan struggled to maintain his composure, veins throbbing on his forehead: "Are you trying to say someone escaped my control?"
That should be impossible.
He had seen that woman with his own eyes, and even interacted with her.
She only had a very faint demonic aura on her, which is common among Demon Slayers... she couldn't be a Demon.
If she were, there's no way he wouldn't have sensed it.
Muzan pondered silently, and the image of a woman suddenly flashed through his mind.
Tamayo?!
Muzan's pupils trembled slightly. Could it be that woman?
From the visuals transmitted back from the minds of those two useless Demons, those two women did interact, but he hadn't paid much attention at the time, as his entire focus was on the Sun Breathing swordsman.
Because of this, several Lower Ranks were exposed to the Demon Slayer Corps and were eliminated.
Douma scratched his head: "Huh, why can't I understand what you two are talking about?"
Why are you just sulking?
The Demons: So brave!
They hadn't felt this atmosphere in a long time. As expected of Lord Douma.
Muzan ignored Douma's frivolity and asked in a deep voice, "Are you certain?"
"Yes."
There was no doubt, that face... that Demon Slayer Mark... he could never forget it.
Furthermore, given Mizuki's condition at the time, it was impossible for her to have left descendants.
As for Yoriichi's descendants... that shouldn't be possible... not to mention they had already destroyed everything related to Sun Breathing back then.
He actually knew about Yoriichi and his wife Shi much earlier than Mizuki did; they had discussed it shortly after his reunion with Yoriichi.
Yoriichi would never marry again.
Even if they took ten thousand steps back and assumed Yoriichi did leave descendants, they couldn't possibly look exactly like Mizuki.
That face, that expression, was identical to the image deep within his memory.
Muzan's face twitched violently twice, and his teeth ground together, making a grating sound.
Another Demon, just like Tamayo, had actually escaped his control?!
He had thought those two were siblings, master and disciple, or perhaps descendants of that monster.
Unexpectedly, it was the younger sister of that monster... she had survived in the world for hundreds of years.
No wonder she was able to kill Akaza; the talent of this entire family is abnormal.
Fortunately... that woman does not use that monster's Breathing Technique.
At this moment, the assembled Demons were completely confused, watching their boss rage, kneeling on the side and trembling slightly.
What exactly is going on?
Just then, Douma sidled over with a smile: "Hey, hey, Lord Kokushibou, is there anything I can help with?"
The Demons: He is so brave.
Kokushibou completely ignored him, his heart in turmoil.
Mizuki is still alive... why hasn't she come to find him?
Is she still hating him?
But she was about to die back then... Muzan snapped back to reality because of Douma's voice, and his slightly ferocious expression softened a little.
After a moment of thought, he bestowed his blood upon them.
"If you see this woman, report it to me immediately."
If she really is the younger sister of that monster, this group of Demons won't be enough; it would probably require Kokushibou to act personally.
The Demons consumed the blood and finally understood why the expressions of the two senior Demons were so dramatic.
Holy crap!
I'm not looking!
What the hell is that?!
Get out of his head!
As that face appeared in the minds of the Demons, an even more ancient figure, originating from the depths of their cells, gradually surfaced.
Unlike the others, a smile suddenly spread across Douma's face.
"Huh? This woman, I think I've seen her."
Muzan turned his gaze: "Seen her?"
Douma smiled: "It was probably about one hundred or two hundred years ago. She came to the cult back then."
He genuinely remembered clearly; Demon Slayers who got along peacefully with Demons were rare. He felt that woman got along very well with him.
"It's just a pity she got away. I truly regret not being able to eat her back then..."
His voice stopped abruptly.
"One hundred years? Two hundred years?" Muzan's voice grew even deeper, and an inexplicable pressure weighed down on everyone. "Then why didn't you report it to me?"
Except for Kokushibou, all the Demons were pressed down by this aura, prostrating themselves on the ground.
Douma, who bore the brunt of it, his pupils shrank violently, his mind trembling.
Rather than being intimidated by sheer presence, it was fear originating from the cellular level, completely bypassing his personal emotional center.
He's angry, Lord Muzan.
Although his face didn't show anger initially, Douma knew that Lord Muzan was very angry.
Realizing he might have caused trouble, Douma quickly explained: "That woman was masked at the time, completely wrapped up..."
Kibutsuji Muzan was indeed very angry.
It wasn't just because Akaza died, but also because of the face Akaza saw right before his death.
Unlike ordinary trash Demons, the movements of the Twelve Demon Moons are generally highly monitored by Muzan.
When Enmu's location overlapped with Akaza's, Muzan paid attention to their positions.
Muzan's control over Demons weakens with distance, especially when performing targeted observation, but Akaza's distance wasn't far at the time, and Upper Rank Demons have more of his blood in their bodies.
Therefore, the moment he switched to Akaza's perspective, he clearly saw the woman's appearance.
To be honest, his heart skipped a beat at the time.
That face was identical to the appearance of that monster from hundreds of years ago.
When the Sun Breathing swordsman wearing sun earrings and the woman who looked exactly like that monster came together, Muzan couldn't remain rational.
So he chose to have Kokushibou resolve the situation swiftly and decisively.
Having suppressed Douma into silence, Muzan quelled the fury in his heart and turned to look at Kokushibou.
"Kokushibou, you know what you must do, don't you?"
Facing Muzan's command, Kokushibou felt a sense of distraction for the first time in hundreds of years, but after only a moment, he respectfully lowered his head.
"As you command."
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