Born from the quantum silence between the Arcane Fracture's first echoes, Entropy Whisper emerged where reality's fundamental laws began to fray at their edges. It feeds on the uncertainty that follows every spectral disruption, growing stronger each time a Wielder questions their memories or doubts their perceptions.

Manifests as a barely-visible shimmer of deep purple and spectral yellow energy that seems to exist in the spaces between sound waves. Its form constantly shifts between states of matter, neither fully solid nor entirely ethereal, carrying within it the mathematical certainty of increasing disorder. The entity resonates at frequencies just below conscious perception, making reality feel subtly wrong in its presence.

Serves as the Fractureborn Echoes' primary agent of systematic corruption, specializing in transforming minor uncertainties into cascading failures that undermine harmonic restoration. It excels at turning the Harmonic Binders' methodical approaches against themselves by introducing doubt at critical moments.