Summary
The world ofMy Hero Academiais teeming with hundreds and thousands of quirks, and despite such a colossal number of novel quirks populating the series’ landscape, each one can beclassified into three categories. These categories are Emitter, Transformation, and Mutant type quirks, and out of these three types, Transformation quirks are the rarest kind. Classifying quirks in the Transformation type category is also rather tedious, as these quirks sit on the border between Emitter and Mutant types.
The workings ofMy Hero Academia’sTransformation-type quirks may seem rather simple, yet these quirks display a certain complexity that isn’t quite apparent in the other two classifications. From resource prerequisites to activation delays, Transformation quirks pose a few challenges for their users. However, overcoming these very limitations is the true source of power for Transformation quirks.

What Are Transformation Quirks?
True to their namesake, Transformation quirks are meta-abilities that grant users the power to either enhance their current physical features or add on to their bodies in the form of physical transformations. However, this explanation of Transformation quirks merely scratches the surface of how these quirks function and aid wielders in battle. These quirks range from allowing users to entirely change their appearance, suchas Himiko Toga’s “Transform,” or enhancing existing body functions, as witnessed in the case of Kirishima’s “Hardening.”
Another function also exists within certain Transformation type quirks, which pertains to removing body parts temporarily,such as Edgeshot’s “Foldabody”which allows him to fold his body to miniscule sizes. Every single Transformation quirk revolves around modifying the wielder’s body to some extent, making their nature quite similar to Mutant-type quirks.

However, the underlying difference between these two quirks lies in the ‘activation’ aspect of Transformation quirks. Instead of inducing a perpetual anomaly in the user’s body, as seen in the form of Heteromorphic quirks, Transformation quirks have to be voluntarily activated to gain enhanced effects. This key difference separates these quirks from their Mutant counterparts.
The Hybrid Nature of Transformation Quirks
Transformation quirks are often called Hybrid or Composite quirks, and this title alludes to their similarities to the other two quirk categories. Dubbing Transformation quirks as Hybrid quirks is logical considering these quirks bear the two main differentiating aspects of Emitter andMutant type quirks. The activation aspect of Transformation quirks is exactly the same as Emitter quirks, as both types require the users to consciously activate their powers.
However, Emitter-type quirks don’t result in any sort of physical changes in the users’ bodies, as this attribute is associated with Mutant-type quirks. Since these two quirk types cannot overlap, the Transformation quirk category serves as a perfect classification for any abilities that require voluntary activation, coupled with physical anomalies in the body.

Limitations of Transformation Quirks
Being a mesh of Emitter and Mutant type quirks, Transformation quirks are riddled with a lot more downsides and limitations. While several Transformation quirks offer powers similar totheir Heteromorphic counterparts, their uptime is extremely limited, and once users run out of stamina and endurance, the enhancements these quirks offer will wear off. Mutant-type quirks are perpetually active, but Transformation types require resources to activate.
Users also need to train their quirks tremendously to prolong their uptime, and some quirks even require an external source of power.Teststetsu’s quirk Steelis a prime example of a Transformation quirk being entirely dependent on external resources, as Steel becomes entirely useless without an external supply of iron. Over-exertion of a quirk in a limited time frame results in similar conditions, reducing the time of Transformation quirks considerably.

Another weakness that Transformation quirks often exhibit is a lack of long-range maneuverability. Since these quirks enhance or mutate certain body parts, most of the resulting powers are tied to their bodies, meaning that most of these quirks operate only in a short range. Emitter-type quirks mostly exhibit free-range powers, but Transformation ones lack this crucial mechanic, deeming them slightly weaker in certain circumstances.
Are Transformation Type Quirks Strong?
Aswith any shonen anime, the most pressing question of all is exactly how strong a certain power is. The same goes for Transformation-type quirks and how they fit intoMy Hero Academia’spower system. Since Emitter type quirks are some of the most prominent ones in the series, viewers expect less from the other two categories. However, Transformation-type quirks have proven to be exceptionally strong in the narrative, and some of the strongest quirks happen to be classified in this category.
Mirio’s Permeation quirk, one of the strongest in the show at one point, is a transformation quirk that entirely permeates his body. Himiko Toga’s Transform, Pro Hero Ryuko’s Dragon, and Tamaki Amajiki’s Manifest are just a few more examples of the extent of power Transformation quirks possess. These characters have pushed these quirks to their limits, showcasing exactly how powerful Transformation quirks are within the show’s landscape.