Voice

Belonging to Hizashi Yamada, Voice is an Emitter Quirk with long reach that does one thing exceptionally well: it strips any ceiling off how loudly its holder can shout. What leaves his mouth arrives as piercing, high-frequency noise rather than ordinary speech.

The Quirk is unusual in its origins. Most powers surface in early childhood, but Hizashi's was active from the moment he was born, a rarity he shares with the Luminescent Baby. It debuts in Chapter 66 of the manga and Episode 13 of the anime, and the two versions differ on timing: readers meet it in the Final Exams Arc, while the anime moves the moment earlier, to the U.S.J. Arc.

Pushed to its upper range, the sound is punishing enough to knock people out of a fight by tearing at their eardrums, sometimes drawing blood. It also functions as a jammer. Anyone relying on a sound-based power, whether that is Earphone Jack or Anivoice, finds their own output swallowed by the volume, which hands Hizashi a structural edge against that whole category of opponent.

Two drawbacks temper it. Leaning on the Quirk for too long leaves his throat raw, and an enemy who burrows below the surface is effectively safe, since soil is a poor medium for carrying sound. To keep his allies out of the blast, Hizashi wears a Directional Speaker System at his collar, a support item that funnels the waves where he wants them.

His named techniques build on that control. Loud Voice pushes his shout into a shockwave that breaks glass and knocks back anything standing in its path, while Loud-Out Shout spreads the same concussive burst across a cluster of targets. In the anime the words themselves ride along the wave in yellow; the manga marks Quirk-amplified dialogue with double-bordered speech bubbles.

Hizashi Yamada is the sole holder. Beyond combat, he treats the Quirk as a public address system, broadcasting evacuation instructions to panicked civilians during Number 6's assault on Naruhata and again amid the terror campaign waged by Humarise.