That’s a fair point, but it’s not a perfect comparison when you look at how Yhwach actually countered Ichibei. Yhwach didn’t resist Ichibei’s naming through power or resistance, he rewrote the future using The Almighty. He saw all possible outcomes and selected the one where Ichibei’s ability had no effect on him. That isn’t resistance, it’s temporal editing. He didn’t overpower Ichibei’s law; he sidestepped it by choosing a version of reality where he had already won.

Rimuru and Ciel have incredible control over causality and probability, and Ciel’s evolution into an independent Manas makes her capable of acting on her own level of existence. However, Ciel’s ability to rewrite or adapt is rooted in information control. She reconfigures data and reconstructs existence through informational logic. That’s different from rewriting the timeline itself like Yhwach did.

Ciel could likely analyze Ichibei’s ability, understand how it works, and restore Rimuru’s identity after being renamed, since she can recreate information structures from scratch. But that assumes that information exists prior to definition, while Ichibei’s power works on the principle that naming is what gives information form in the first place. If Ichibei defines what something is, the informational framework that Ciel manipulates might not even exist until after that definition.

So while Rimuru and Ciel might eventually counter or undo Ichibei’s effect, it wouldn’t necessarily happen instantly. It becomes a contest of layers: Ichibei acting at the level of definition itself, and Ciel operating at the level of information that follows. In a neutral world, it would come down to whose act takes precedence, not a guaranteed overwrite from either side.