Garou vs. Gyoro Gyoro

Garou vs. Gyoro Gyoro is the battle between the hero hunter and one of the leaders of the Monster Association.

Prologue
Garou is in battle against Overgrown Rover and is dominated for most of the battle. When Garou is blasted by one of Overgrown Rover's energy blasts, he's sent through several floors. Garou is buried underneath rubble, feeling trapped but knowing that he has to get out fast to counterattack. However, Garou doesn't realize that he's in the personal quarters of Gyoro Gyoro, who is very impressed with his growth. At this point, Overgrown Rover decides to stop pursuing Garou to allow Gyoro Gyoro to talk to him.

Battle
Gyoro Gyoro speaks to Garou, referring to him as a half-monster, although says that despite not being a full-fledged monster, he still shows incredible resistance against Overgrown Rover's energy attacks. In the end, Gyoro Gyoro says it still isn't enough, but that Gyoro Gyoro can train Garou to be the strongest monster of them all. Garou asks the psychic monster how she plans to do that, and Gyoro Gyoro replies that what she would teach is not about psychic power or martial arts, but rather the secret of monsterfication.

Gyoro Gyoro goes on a rant of how Garou must experience death a number of times, and the numerous dangers that come with the task, such as the high risk of dying, the chance of losing one's mind, or not experiencing any further growth. Gyoro Gyoro also states that the most important factor is having the individual experience a personal hell suitable for their level. Garou remarks that Gyoro Gyoro appears to have done a lot of testing on the subject. Gyoro Gyoro states that "a lot" doesn't even begin to describe how much she's tested the process. Many of her tests involved creating monster cells, although the monster cells only give one increase of power without further growth, and other tests involved feeding monsters to other monsters, performing blood transfusions, organ transplantations, mating monsters with one another, inflicting pain and stress on them through various means, amplifying their anger and hatred, and much more. Finally, she learned the secret of putting monsters through multiple near-death experiences, although many of these monsters died before reaching disaster level Dragon, until one day, she came across her first success: Orochi.

Gyoro Gyoro, however, states that Garou has potential that surpasses Orochi, and that after his clash with Royal Ripper, he surpassed another wall. Gyoro Gyoro tells Garou that his monsterfication is progressing slowly but surely, and that he's become extremely strong in such a short amount of time. Gyoro Gyoro continues by saying that with her help, she can make Garou's dream come true by becoming the strongest monster and eradicating heroes from the world. Surprisingly, Garou rejects her offer, saying that he wouldn't be caught dead working with someone like her, and to not stick her nose where it doesn't belong.

Gyoro Gyoro retorts by saying the moment he caught her eye, he lost the right to refuse. Garou viciously states that he hates assholes who look down from their perch more than anything, so Gyoro Gyoro states that those are big words coming from someone who can't move. The psychic monster uses her psychic powers to restrain Garou, proclaiming to Garou that her powers impinge on the domain of the gods, surpassing even Fubuki and Tatsumaki. But to her surprise, Garou is able to adapt to her psychic powers little by little, and Garou states that this is his fighting spirit, referencing Metal Bat's usage of the term. Gyoro Gyoro thinks to herself that his adaptive abilities exceed the norm, so she launches multiple rocks at him in an attempt to restrain him, but Garou punches all of the rocks. The hero hunter then mocks Gyoro Gyoro by saying that the moment she started throwing rocks at him, her psychic binding came undone, specifically mocking her inability to multitask.

Garou jumps up onto a perch, meeting Gyoro Gyoro at eye-level, proclaiming that the idea of a lowly monster such as herself cultivating a genius like himself was ridiculous. He thinks out loud that if he defeats one of the heads of the Monster Association, the rest of the association would come crashing down with her. Garou prepares to resume their fight, but Gyoro Gyoro comments that with the heroes coming at her doorstep, she doesn't have time to waste stamina, so she calls upon Orochi to deal with Garou. Garou's eyes widen, and Gyoro Gyoro wishes Garou the best of luck as Orochi's hand erupts from underneath Garou and grabs the hero hunter, ending the battle between Garou and Gyoro Gyoro.

Aftermath
Shortly after, Orochi and Garou engage in battle. Gyoro Gyoro watches from the sidelines and comments on the battle several times.

Trivia

 * In the webcomic, Gyoro Gyoro has no knowledge of the Limiter, and Orochi does not exist, so instead, Gyoro Gyoro uses her psychic powers to increase gravity around Garou, ending the battle.