Inasa Yoarashi is a tall, muscular figure standing at 190 cm, with buzzed dark brown hair, black eyes, and a hero costume comprising a burgundy suit with yellow buttons, a fur-lined cape, wind-expulsion tubes, and goggles. Post-graduation, his hair lightens, and he replaces his hat with goggles, marking his ascent to Pro Hero No. 16 eight years after the Final War. Raised idolizing heroes with "hot spirits," particularly Endeavor, Inasa’s admiration shattered when Endeavor rejected his autograph request. This bitterness extended to Shoto Todoroki after a cold interaction during U.A. High’s recommendation exam, where Inasa bested Shoto in a marathon but faced dismissal. Despite top scores, he left U.A. for Shiketsu High. His Quirk, Whirlwind, enables precise wind manipulation for combat, defense, and flight, though heat destabilizes his control. His costume’s vents and propulsion systems enhance Quirk efficiency. During the Provisional Hero License Exam, Inasa defeated 120 competitors in the first phase but clashed recklessly with Shoto during rescue exercises, causing mutual failure. Reflecting, he recognized his own resemblance to Endeavor’s coldness and apologized. Partnering with Shoto in the Remedial Course, they combined Quirks to pacify children, passing the exam. Though initially disdainful of Endeavor’s reform attempts, Inasa acknowledged the hero’s genuine growth during the Remedial Course and pledged support. In the Final War, he unleashed storm-enhanced winds to neutralize Twice’s clones, showcasing evolved heroism. Energetic and loud, Inasa values passion and camaraderie, prioritizing teamwork despite occasional overzealousness. His early pettiness toward the Todorokis matured into mutual respect, reflecting his commitment to "hot-blooded" heroism through adaptability and self-improvement.