Whirlwind

Whirlwind is an Emitter Quirk with long-range reach, belonging to Shiketsu High student Inasa Yoarashi. It hands its owner authority over the surrounding atmosphere, letting him summon everything from a rough shove of air to a self-contained tornado. The Quirk first appears in Chapter 104 of the manga and in Episode 54 of the anime.

What separates Inasa from a simple wind-thrower is precision. He rarely needs to move much at all to raise a gale, and once the currents are up he owns them completely, steering many separate streams at once rather than releasing a single indiscriminate blast.

Air answers Inasa on command, and it answers in layers. He can run numerous distinct currents simultaneously, threading rubble and people through the sky along separate paths so nothing crashes into anything else. That same delicacy scales up into raw force whenever he wants it, sweeping opponents off their feet or launching allies and heavy objects together in one motion.

Defensively the Quirk earns its keep by batting projectiles off course and granting Inasa the mobility to slip away from incoming attacks. Bursts fired at the ground shove him forward for a sudden turn of speed, no equipment required. His hero costume extends this further: tubing routed around his body funnels the wind into miniature cyclones that suspend him aloft, giving him genuine flight.

Two limitations exist. Restraint blunts it, since Whirlwind still functions when Inasa is pinned but drops sharply in power and speed once he cannot work his limbs freely. Fire is the sharper problem, because high temperatures push air outward and a large enough blaze scrambles the flow he depends on, costing him control.

Inasa Yoarashi is the sole wielder, and his mastery of it made him one of the strongest students of his year. Offensively he leans on broad, punishing blasts that simply remove opponents from where they were standing.

The Quirk's friction with Shoto Todoroki's Half-Cold Half-Hot became a story in itself. Shoto's heat initially wrecked Inasa's airflow, putting the two at odds, but cooperation turned the clash into a partnership. Working together they produced results neither could reach alone, among them a rotating column of flame and, in a lighter moment, an entire playground built from ice. Inasa has also supported teammates directly, notably by pouring wind into the Light of Baldur so that Fumikage Tokoyami's Ultimate Move struck harder.