What is Mirio’s Quirk in My Hero Academia? Explained

Fans of My Hero Academia are frequently curious about Mirio’s Quirk due to its unique functionality and his loss of powers in the Overhaul arc, causing some confusion. Throughout the series, his Permeation ability has proven to be incredibly versatile, and Mirio made the most of it during his journey in the story.

It can be argued that this Quirk serves as a perfect representation of Mirio’s persona in My Hero Academia, as his commitment to honing his skills with it is a defining trait. This was evident in his fight against Overhaul, where his Quirk proved to be highly advantageous even against adversaries possessing formidable abilities.

This article includes spoilers for the series.

What is Mirio’s Quirk? Explained

Explaining Mirio’s Quirk

Mirion as seen in the anime (Image via Bones).

Mirio’s Quirk, Permeation, allows him to become intangible, granting him the ability to pass through objects and living beings. This was demonstrated during his fight against Overhaul, where he was able to surprise the villain by punching him and passing right through his body.

Additionally, it should be noted that his Quirk allows every element to pass through him, including light, sound, and air. This renders him unable to see, hear, or breathe while utilizing his power. As a result, he must always keep one foot on the ground to prevent falling, a crucial aspect of his Permeation ability.

How Mirio uses his Quirk in My Hero Academia

Mirio using his hero outfit in the anime (Image via Bones).

Throughout the Overhaul arc in My Hero Academia, Mirio demonstrates the full range of his Quirk’s versatility, which he also utilizes in various ways throughout the series.

Deku and his classmates are no match for his Permeation ability, as he effortlessly moves around the building and defeats them in record time. This has caused many to question the specifics of Mirio’s Quirk and its workings, as it can be quite perplexing.

During the invasion of Kai Chisaki’s headquarters, Mirio and a team of heroes manage to gain an advantage as he uses his Quirk to walk through walls, allowing him to reach Overhaul and successfully rescue Eri.

During the battle with the main villain, it was demonstrated that he can easily counter attacks due to his avoidance of physical contact. In fact, Mirio would have emerged victorious if he had not lost his powers during the confrontation.

After regaining his Quirk, he joined the ranks of multiple heroes in the ultimate battle against Tomura Shigaraki during the final war arc. Despite the significant difference in strength, Mirio’s Permeation proved to be a formidable opponent against Tomura’s Decay Quirk, as Tomura’s ability relies on physical contact for destruction, giving Mirio the opportunity to buy time for Deku to arrive.

Why Mirio’s Mastery of His Quirk is So Impressive

Mirio’s determination to become a hero since his childhood is evident in his complete mastery of his Quirk, making him one of the most hardworking characters in My Hero Academia.

Despite being initially viewed as useless and unsuitable for a hero, his Permeation ability proved to be his greatest strength as he was able to defeat and overpower a formidable opponent like Overhaul.

The final chapter of the series, which took place eight years after, confirmed that Mirio had risen to the rank of Number One Pro Hero. This demonstrated that his mastery of his Quirk had enabled him to fulfill his lifelong ambition, just as his mentor Sir Nighteye had foretold before his passing.

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