The My Hero Academia universe is renowned for its diverse and intricate character roster, captivating audiences with a mix of heroes, villains, and everything in between. A standout figure in this vast array is Kai Chisaki, also known as Overhaul. His unique quirk, sharing its name, has sparked numerous discussions among fans, particularly regarding its perceived limitations throughout the series.
Many fans ponder the question: “Did Horikoshi nerf Overhaul?”Although determining a definitive answer is inherently speculative, it’s clear that Kai’s abilities were circumscribed by narrative requirements and character development throughout the story.
Disclaimer: This article may contain spoilers from the My Hero Academia anime and manga and reflects the author’s personal perspective.
Exploring the Overhaul Quirk in My Hero Academia

Introduced in episode 62 during the compelling Shie Hassaikai arc, Overhaul is a quirk that grants its user the extraordinary ability to disassemble and reassemble matter at will. Sir Nighteye elucidated this power, confirming Kai Chisaki as the possessor.
Once Kai disassembles a target—be it a living organism or an inanimate object—he possesses the choice to either leave it in its disassembled state or reconstruct it, even altering its form if he desires. Remarkably, he requires only the faintest touch to trigger his quirk, as vividly illustrated in the anime when he dismantled Mr. Compress’s arm with just a fingertip.

Furthermore, Kai can merge various objects or living beings, resulting in a singular entity. His quirk is versatile enough to affect other quirks, allowing him to recombine their effects as long as he retains contact with both elements. This ability can create a continuous cycle of enhancement, demonstrating the vast potential of the Overhaul quirk.
Additionally, the Overhaul quirk offers regenerative properties when used on humans. Kai can mend injuries and various ailments by reconstructing the affected body part to a perfect biological state. However, he emphasizes that this deconstruction process is often agonizing, highlighting a significant drawback to his otherwise miraculous healing ability.
Overhaul’s Vulnerabilities in My Hero Academia

One of the most evident weaknesses of the formidable Overhaul quirk is its reliance on Kai’s hands. If they are restrained, his ability is rendered ineffective. This fact is showcased in the anime when Mr. Compress and Tomura Shigaraki incapacitated his arms, thus nullifying his quirk’s functionality.
Other limitations include the inability to activate the quirk mid-air and a short cooldown period, meaning that Kai must physically touch an object for his powers to work. In addition, due to this cooldown, he cannot rapidly disassemble or reassemble nor utilize his ability multiple times in quick succession.
Final Thoughts
While the manga creator, Kohei Horikoshi, provides little definitive insight into the limitations of the Overhaul quirk, this article aims to illuminate its powers and vulnerabilities rather than label them as “nerfed.”Many fans believe Overhaul holds tremendous potential that could have presented tougher challenges for the heroes if fully realized. It stands as a quintessential example of how versatile abilities can be creatively showcased in a narrative, leaving fans eager for more exploration of such formidable powers in the series.