Chizome Akaguro, better known as Hero Killer: Stain, is the kind of guy who inspires fear and resentment across Japan and yet, in the same breath, motivates and encourages those who actually pay attention to his words. Hero Society may look pretty and perfect on the surface; however, the unjust balance of power, status, and financial distribution, is dished out to undeserving Quirk Users who hold the fictitious title of Hero, while the rest get discarded like trash and essentially forced to worship these false idols.
The following content contains spoilers from Season 6 of My Hero Academia. Whether fans consider Stain a true Villain or not is up to them, but after his arrest in Season 2, and his heartwarming interaction with All Might in Season 6, more and more people started jumping on the bandwagon after seeing the truth in the Hero Killer's sentiments. Surprisingly, it's not just the Villians who find commonality with Stain, as he has been highly celebrated by a large bulk of average civilians (and a couple of Heroes), many with matching cosplay accessories to boot!
6 Iida's Introspection
Tenya Iida's run-in with Stain essentially changes the whole course of his Hero career. Initially, he faces the so-called-Villain with a hateful vengeance in his heart and yet walked away with greater consideration for his own faults, and a better understanding of what needs to improve before he earns Ingenium's name. "I hate him, but he spoke the truth."
While the class rep. Certainly doesn't condone the Hero Killer's actions, Tenya openly declares that he cannot refute Stain's claims. He admits to allowing his 'heroic' ego to overwhelm his logic and subsequently became fueled by hatred instead of a sense of justice. It is not very admirable to be self-seeking instead of self-reflective, which Tenya learns the hard way, all thanks to Stain's brazen lecture in Season 2. He may not be an all-out supporter, but Tenya does not refute the positive results of his exchange with the Hero Killer.
5 Giran, the Go-Getter
Even though Giran tends to follow the money trail rather than a moral code, he appears to hold the Hero Killer in high regard and ensures to spread Stain's story among the Villain community, to anyone who would hear it. Giran claims that "this guy's way of life is infectious," and is eager to witness the ripple effect as criminals regain their enthusiasm for mischief-making.
It is undeniable that Giran is already tallying his expectant reward, as an increase in the overall crime rate will assuredly help his broker business, lining his pockets substantially, especially when it comes to recruiting for the League of Villains. Regardless of his reasoning, this scoundrel is definitely a Stain Stan!
4 Shishikura The Sherrif
Another Hero to make the list is Shiketsu High School's self-declared representative, although he will fervently deny having any respect for the Hero Killer, if asked directly! Much like his idol, Seiji Shishikura wishes to irradicate the world of false Heroes, so much so that he puts his own Provisional Hero License on the line just to prove his point.
Seiji completely disregards the objectives of the Exam and begins targeting undignified students and "weeding out the riff-raff," impeding their progress up the ranks and therefore eliminating undeserving Heroes right at the source. If Stain could see Seiji's work, he would surely beam with pride!
3 Himiko's Heartbreak
The vicious Vanguard Action Squad (which subsequently became the League of Villains) grew substantially after Stain's life mission was made public, and Himiko Toga was one of many who were spurred to action by the prospects of living in a more just world.
Like many other criminals prowling the streets, Himiko was feared purely because of the nature of her Quirk, and, after years of trying to repress her feelings and act the "goog-girl" part, she was still shunned from society and immediately villainized. Her passion for equity is amplified further by Twice's (arguably) undeserved demise in Season 6, and she begins to question her warped admiration for Izuku and Ochaco. While her bloodlust seemed to be simply opportunistic in the past, Himiko looks more focused, with her targets firmly set on those hateful Heroes.
"If Heroes are supposed to save people, then why didn't they treat Jin like a person?"
2 The Diabolical Dabi
Dabi's recruitment into the Squad is a tense affair indeed, as he and Shigaraki immediately butt heads (Sound familiar, Chizome?) And things nearly come to blows. Dabi has a major problem with Shigaraki's mentality and calls him out for wishing to cause mindless chaos instead of rectifying the wrongs of Hero Society. Dabi's dream is to "make Stain's will a reality," and he shan't waste his time and energy on misguided thrill seekers.
One might argue that Dabi deserves the top spot as Stain's biggest supporter, as this miscreant takes every aspect of the Hero Killer's moral code to heart and is unafraid to shed some blood in order to cull the herd. However, the new-and-improved Stain (of Season 6) aligns better with Spinner's thoughtful approach to seeking justice, debatably taking Dabi down a peg.
1 Spinner the Stan
Shuichi Iguchi was virtually hunted for being a heteromorph in his youth and thus decided to bide his time in solitude as an underappreciated NEET. However, he was fortunate enough to stumble across Stain's wisdom one day and underwent a full-blown makeover in honor of his new mentor.
Spinner eventually teams up with the infamous Shigaraki but doesn't always follow his lead to the tee, particularly if his leader's demands don't align with Stain's sentiments. He even spares Izuku's life during the Vanguard Action Squad Invasion purely because Stain had deemed Deku "worthy"; however, his loyalty to Shigaraki is unlikely to produce the same results. The Hero Killer helped a young, despondent Spinner find his purpose in life and begin taking action to facilitate a revolution, subsequently becoming the leader of the pack in his own right.