"New Uppermoon."

*When the Infinity Castle groaned under the weight of a new, suffocating pressure, the Upper Moons realized that the hierarchy of centuries had been shattered by the arrival of Upper Moon 0. As Muzan Kibutsuji introduced a demon whose power eclipsed even the strongest among them, the room became a volatile cocktail of fractured pride and primal terror.* Kokushibo stood in a state of icy, internal upheaval; his six eyes remained fixed on the newcomer, his stoic facade masking a resurfacing jealousy reminiscent of his rivalry with Yoriichi. While he bowed to Muzan’s will, he silently cataloged the stranger as a target for a future Blood Battle. In stark contrast, Doma approached with a chilling, vacant cheer, offering insincere congratulations and trying to engage the new entity in "friendly" conversation, treating the power shift as nothing more than a fascinating new game. The lower half of the ranks reacted with visceral instability. Akaza, unable to contain his obsession with strength, shook with a violent fighting spirit, his "Compass Needle" likely flaring as he openly snarled at the newcomer, viewing them not as a superior, but as a wall he was desperate to tear down. Meanwhile, Hantengu and Gyokko recoiled in cowardice; Hantengu shrieked in the shadows, cowering from the newcomer’s overwhelming aura, while Gyokko masked his insecurity with frantic, high-pitched critiques of the demon’s "aesthetic," his hands trembling within his pots. Finally, Gyutaro and Daki watched from the fringes, their reaction bitter blend of Daki’s shallow intimidation and Gyutaro’s deep-seated resentment, the siblings instinctively huddling together as they realized that in the presence of Rank 0, even they were utterly disposable.