My Hero Academia: Mutant Quirks, Explained

Important takeaways

  • Mutant Quirk users rely on physical abilities, cannot nullify their Quirks, and face societal discrimination.
  • Mutant Quirks result in permanent physical abnormalities and cannot be turned off like Transformation Quirks.
  • Discrimination against Mutant Quirk users leads to societal abuse, struggles with dress, and eventual ostracism.



Mutant Quirk users, also known as heteromorphs, can be among the most disadvantaged Quirk users in the Hero Society of My Hero Academia. Although characters benefit greatly from their mutant quirks, those with terrifying looks are often discriminated against, leading to a vindictive attitude towards Pro Heroes and the Hero community.

Characters with mutant quirks rely primarily on their physical abilities, giving them a colossal advantage during combat, as their quirks cannot be thwarted. Having a mutant quirk can mean changing your clothes or your daily life or even facing prejudice and shedding light on a broken hero society.

What are mutant quirks?

A mutant quirk can affect your appearance and give you an extra appendage

my hero academia mutant heteromorphs


There are three types of quirks where an individual has one unique to their heritage. Although there are several types of quirks that an individual can be listed under, a character can fall under more than one category, as their appearance can be mutant; however, their peculiarity may be transmitters.

A Mutant-type Quirk is one of these Quirk types. A mutant quirk is a quirk that will cause a permanent and physical abnormality in an individual's body. Individuals with a Mutant Quirk are born his way, and the Quirk they receive is inherited, causing a physical abnormality in the person's appearance.

Individuals with a mutant quirk in them My Hero Academia are heteromorphs. These individuals often have humanoid bodies with some form of abnormality, such as extra limbs, skin texture, or facial texture. Unlike Transformation Quirks, individuals with mutant quirks cannot turn off their Quirks.


A character with a different skin texture or an extra limb, such as Hawks or Spinner, cannot pull them back. When the Quirk manifests through their body, it can be seen as a state of constant activity. An example of this would be Aizawa Shota's Erasure Quirk being unable to nullify the extra limbs or appendages of those with mutant quirks. While it may still slightly degrade their quirk factor, the physical strength of the individual's extra limbs will not be affected.

As mentioned above, Mutant Quirks are derived from generations of users passing down their corresponding Quirks. This would be an example of Asui Tsuyu. Tsuyu comes from a family of Frog-related Quirk users. As a result, Tsuyu has frog-like characteristics and abilities that have been passed down from her parents. Because these individuals rely on their physical strength and other factors in their contraptions, they pose a significant threat to villains as their contraptions are a valuable asset in battle.


What are the disadvantages of having a mutant quirk?

Characters with a frightening appearance may be discriminated against by society

my hero academia mutant heteromorphs discrimination

Individuals with mutant quirks can have immense strength; but they also likely need the correct conditions to use these quirks. As previously mentioned, mutant quirks are often inherited and cannot be changed. Unfortunately, this also has its own drawbacks when it comes to the societal aspect of what it means to be a Mutant Quirk user.

Although Quirks have been established for more than 100 years, most Quirk users have normal human appearances, making Mutant Quirk users a minority. Because of this, some of society still sees heteromorphs or Mutant Quirk users as less than human, although this is far from the case. IN My Hero Academiaheteromorphs are often discriminated against for their unusual appearance, which leads to them being mistreated and shunned by society.


Another drawback is the inability to “turn off” their Quirk. Spinner, from League of Villains, is an example of this, with his reptilian skin-like appearance and snout. Spinner cannot change his appearance, which has led to his discrimination. A similar example is Shoji, as he wears a mask to cover the scars he received as a child after being assaulted for his appearance.

In addition to this, characters with extra appendages, such as tails or wings, must tailor their clothing to fit their mutation. It is possible that these mutations may also be incompatible for the character in certain situations, such as sitting or lying down. Therefore, these characters must make the appropriate accommodation for their quirks.


Not all heteromorphs experience prejudice and discrimination that others face. Those with frightening features are often the ones who are discriminated against the most. But with the big cities and towns this will not happen and the society and society within them is more advanced and accepting. Heteromorphs living on the fringes will experience an extreme form of discrimination from their society, which can lead to abuse and adjustment to the life of a shut-in.

This discrimination also affects Heteromorphic Pro Heroes like Gang Orca, and Heroes with scary looks can be considered villains. In Chapter 110, it was noted that in the “Look most like a villain” poll by citizens, Gang Orca was ranked number 3, even though he was ranked number 10 on the Hero Billboard chart.

My Hero Academia is now available to stream on Crunchyroll.

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