Deep within the Infinity Castle, Muichiro stared at his trembling hands in shock.
Under the terrifying pressure of the demon before him, his body instinctively resisted fighting. He was so weak that he could not even draw his sword.
The demon before him was far stronger than he was.
This overwhelming pressure was on an entirely different level from Hantengu, whom he had encountered in the Swordsmith Village.
He raised his eyes, his body taut, and met the demon's six blood-red eyes.
Actually, there were far more than six eyes. Many horrifying eyes also sprouted from the rusted sword in the demon's hand.
But setting those horrifying details aside-a swordsman, the mark on his face, the Nichirin Blade in his hand...
Upper Rank One, standing before him...
Could he have once been a Demon Slayer?!
And his hairstyle, along with the position and shape of the mark on his face...
They looked far too much like the Yoriichi Tsugikuni doll Muichiro had seen, the one passed down in Kotetsu's family!
Upper One did not immediately draw his sword and attack.
His voice was slow but firm. He watched Muichiro, seemingly puzzled.
"What... is your... name...?"
Upper One's question made Muichiro dimly realize something.
"...Muichiro Tokito."
He answered while keeping his eyes fixed on Upper One's expression.
Could it be...?
Had the Demon Slayer who had dominated the Sengoku Period and nearly slain Muzan switched sides and joined the demons during the years after his disappearance?
If that was true... how could the Demon Slayer Corps possibly win?!
Upper One watched him calmly and spoke slowly. "So even the surname... 'Tsugikuni'... has been lost..."
Tsugikuni...
Muichiro's heart leaped into his throat.
"Who are you?!"
Muzan's massacres had killed the Tsugikuni family's descendants one after another. The Tokito family's ancestors had only