Both this sham-filled society... and the criminals who wield their power in the name of petty mischief... are targets of my purge... All for the sake of a better society...
Chizome Akaguro in "Conclusion?!"

Chizome Akaguro ( (あか) (ぐろ) () (ぞめ) Akaguro Chizome?), also known as Hero Killer: Stain (ヒーロー殺しステイン Hīrō Goroshi Sutein?) and formerly the vigilante Stendhal (スタンダール Sutandāru?), is a villain and ex-vigilante that is notorious for having killed many pro heroes. He is the main antagonist of the titular Vs. Hero Killer Arc

Chizome is currently under police custody and locked up in Tartarus.


Stain's true appearance

Chizome's true face

Chizome is an intimidating, muscular man who walks with a distinct hunch, and has a flat, somewhat triangular face with no nose; he removed it himself, and a very long tongue, tainted with numerous small bumps. He has rather long black hair which he wears in a messy fashion; it would drape over his face if not for his headband and mask, and small blood red eyes with tiny irises.

He sports a dark combat suit, plated with metal armor across his body to holster his weapons. The torso is sleeveless, so he instead wraps his arms in yellowed bandages, all the way from just below his shoulders to his wrists. He also wears long black wristbands and a watch on his left arm, and his knees are protected with metal pads, the costume completed by black boots with steel armor. He always dons his signature blood-red scarf and matching headband, as well as the tattered cloth he wears around his face as a mask.

As Stendhal, he had long black hair that he tied into a ponytail. He wore black clothing which looked similar to bulletproof clothing and had six small folding knives, three on the right side and three of the left side, with two pairs of pockets beneath them, but his most striking feature was his mask, which completely covered his face.


Stain intimidates Izuku

Stain's frightening intensity.

Stain is a cold, unforgiving man with a sense of duty to cleanse society of false heroes. He believes that those who work as Heroes to collect income are unworthy of being called the name and only All Might is a true hero. Due to his strong ideology, he took it upon himself to become Hero Killer: Stain to stain his own hands with blood to purge fake heroes and change the current society.

Stain does not wish to kill those who are not targets for his own cause. He dislikes needless bloodshed and came to blows with Tomura Shigaraki because of it. He is reluctant to attack Tenya Iida before the hero-in-training provokes him. He even tells Tenya the true traits of a hero in contrast of those who desire to use their Quirks in selfish ways. Stain spares Izuku Midoriya because he shows the characteristics of a true hero. He believes heavily in creeds and convictions, stating that they are needed in order to accomplish anything and that without them people are weak and will eventually die.

In spite of his extremist views and beliefs, Stain does have genuine ideals about Heroism which he stands by firmly. He does not hesitate to save people he deems worthy of being called Heroes, does not like killing without reason, and will even give advice to his enemies. He seems to acknowledge that what he is doing is morally wrong, but believes that in order for society to be put on the right path, someone must be what he is, indicating he sees himself as somewhat of a martyr.

Stain's bloodlust

The Hero Killer's malefic aura

Stain's conviction gives him an incredibly murderous aura and bloodlust that paralyzed several heroes in fear. It gives him enough confidence to willingly challenge several pro heroes at once, even after sustaining major injuries.

As Stendhal, he believed that any who "wielded power without conviction" were automatically sinners deserving of death, and used this belief to justify his actions as heroic instead of hypocritical. That said, he was perfectly willing to work alongside villains like Kuin Hachisuka as a means to an end. Stendhal also appeared to suffer from a split-personality disorder of some kind that caused him to view his vigilante and civilian identities as two separate entities (his mental change signified by whether or not he is wearing his mask at the time). However, his confrontation with Knuckleduster caused him to change his beliefs, and start thinking that those who are not "true heroes" are the reason for society's problems.


Stain overpowers Shigaraki

Stain's abilities allowed him to easily overpower Tomura Shigaraki of the League of Villains.

Overall Abilities: Stain is an extremely powerful villain who has claimed more lives than any other since All Might's debut. Stain's aptitude allowed him to murder 17 known Pro Heroes, and cripple 23 others to the point of being unable to make a full recovery. Stain has displayed creativity and mastery over his fighting style. He is able to deal with close and long-ranged opponents through a mix of misdirection, aggression, prediction, and use of the environment. His battle prowess allows him to overwhelm his targets in armed combat and compensate for his Quirk's restrictive activation cost. Stain was able to defeat and critically injure Tensei Iida, a Pro Hero with above-average formidability and high fortitude, who had attempted to apprehend the former vigilante. This spectacle left Tensei as a paraplegic, Stain's 24th crippled victim, and the last Pro Hero that Hero Killer had defeated. Stain's reputation and abilities garnered the attention of Tomura Shigaraki, who attempted to recruit the Hero Killer into the League of Villains. After refusing to join the Villain Alliance, Stain effortlessly overpowered both Tomura and Kurogiri, two highly capable villains.

While in Hosu City, Stain attempted to kill the Pro Hero Native, and was faced with Tenya Iida, and was able to incapacitate the new Ingenium, mostly due to the U.A. student being vengeance-driven over the Hero Killer crippling Tensei, Tenya's older brother. Stain almost killed Tenya, had it not been for the timely arrival of Izuku Midoriya, who was searching for Tenya. Even though Izuku's new abilities took Stain by surprise, the ex-vigilante was still able to blindside him with his Quirk, Bloodcurdle, but, seeing Izuku as a true hero, decided not to kill the latter. After Stain paralyzed Izuku, he attempted to kill Tenya and Native again, but his crusade was once again interrupted due the additional appearance of Shoto Todoroki.

Stain kills Nomu

Despite being incapacitated, Stain was able to swiftly kill the Winged Nomu, and save Izuku Midoriya from the creature's grasp.

Stain found it more difficult to handle Shoto compared to Izuku, Tenya, and Native, especially thanks to the heterochromic using the interchangeability of his fire and ice powers. This drawn-out confrontation caused the effects of Bloodcurdle to wear off for Izuku, giving the One For All inheritor a chance to join the fight, resulting in Izuku and Shoto tag-teaming to oppose the Hero Killer. Tenya also found himself free from his paralysis, and with him jumping into the fray as well, having purged himself of his desire for revenge, Stain found himself grossly outnumbered, 3-to-1, and nearly overpowered. According to Izuku, Stain's tenacity completely changed his movements after getting desperate to kill Tenya before reinforcements arrived. Overall, it took the combined efforts of Izuku, Shoto, and Tenya, 3 of U.A. High School's strongest students, to finally defeat Stain. After the battle, Shoto commented on Stain being a strong combatant who likely allowed him and Izuku to live. When the Winged Nomu arrived on the scene and captured Izuku, Stain broke free of his restraints, and displayed that, even when incapacitated, he was still more than capable of immobilizing and killing the artificial human, saving Izuku as a result.

  • Immense Speed: Stain's most notable ability is his unmatched speed. He is able to evade Tenya's high-speed kick when they first meet as well as partially block Tenya's Recipro Burst during the ensuing battle, and Tenya is revered as U.A.'s fastest student. Shoto Todoroki was unable to land a single strike on Stain, even using both fire and ice attacks, due to the Hero Killer's formidable reaction time. Shoto mentioned that Stain is so fast that he could not even consider running away as an option. Despite Stain's incredible speed however, he was unable to evade the combined, high speed assault from Tenya's Recipro Extend, and Izuku's One For All: Full Cowl that was used in tandem with a 5% Detroit Smash.
  • Enhanced Strength: Stain has considerable strength, enough to cleanly slice through many of Shoto's ice attacks.
  • Immense Stamina: Stain also appears to have a high pain threshold, as shown when he takes a direct blow from Izuku's 5% Detroit Smash to his head and remained mostly unfazed. Despite his lungs being perforated by his broken ribs, Stain remained standing even after falling unconscious.

Tactical Intellect: Stain is shown to possess some analytical skills. Stain took notice of all the chaos caused in Hosu City, and correctly deduced that Tomura Shigaraki and the League of Villains were behind the attack. While engaged in battle against Shoto, Stain pointed out that the heterochromic hero relied too much on the destructive power of his Quirk, making him predictable and easy to exploit in battle. Stain also carries a spare knife in under his sleeve in order to surprise his opponents in the event that the Hero Killer is deprived of most of his weapons.

Indomitable Will: Stain's ridiculous force of will has a strong impact on the psyches of others, even in during combat. He was able to paralyze several top heroes, including a seasoned veteran like Gran Torino and the No. 2 (now No. 1) Hero Endeavor, with fear despite having suffered severe injuries. He was also able to force many heroes to reconsider their actions and beliefs, even during combat. Even after his capture, footage of his speech to the heroes inspired many criminals and vigilantes into action, bolstering the ranks of the League of Villains considerably.


Bloodcurdle anime 2

Stain licks blood from his knife to activate his Quirk.

Bloodcurdle (凝血 Gyōketsu?): Chizome can paralyze his target by ingesting samples of their blood. The amount of time a victim is paralyzed for varies depending on blood type; in descending order from longest to shortest duration, B, AB, A, and O. Regardless, the maximum amount of time anyone can be paralyzed is eight minutes. Chizome uses blades to draw blood from his opponents in order to use his Quirk.


3/5 C
6/5 S
5/5 A
3/5 C
1/5 E
Stain's stats, according to the Official Character Book


Stains weapons

Stain's weapon arsenal.

Weapon Arsenal: Before being arrested, Stain carried various weapons with him: A worn and partially damaged katana, five daggers, throwing knives, toe-spiked boots, and folding knives.

Battles & Events

Battles & Events


Chizome Prototype
  • In his first sketches, Stain had shorter hair, his headband was smaller, and he wore a belt with pockets on his sides. He did not have his wristbands, his neck was covered with ribbons and he carried more weapons. He also had a tube equipment connected from his throat to his mouth, possibly to assist him with blood ingestion for his Quirk activation.
    • The tube equipment idea may have been reused for Himiko Toga, who utilizes similar equipment for quick blood absorption.
  • Stain's dark outfit, choice of weapons and violent ideology are most likely derived from the comic book anti-heroes of the 90's, a trend galvanized primarily by creators like Rob Liefeld and Todd McFarlane. His mainly black costume and long, flowing, tattered red scarf are particularly reminiscent of McFarlane character Spawn.
  • Stain's design, bandanna, samurai equipment and perhaps even his lack of a nose may have possibly been inspired by the Teenage Mutant Ninja Turtles, given that they debuted in a comic with a much darker tone than what they are known for today.
    • Interestingly, Shuichi Iguchi, his admirer, has a similar appearance, furthered with the green skin, reptile attributes and wild teenage motivations.
  • Additionally, Chizome's personality and premise are very similar to the Marvel anti-hero Frank Castle, aka The Punisher. Both are seasoned warriors (Chizome a vigilante, Frank a Vietnam War veteran) who resort to murder to act upon their absolutist ideals of "justice", both with a strict moral code conducting their actions that separates them from outright villainy (The Punisher only kills criminals, while Chizome only kills corrupt heroes)
  • Chizome's name contains the kanji for "red" (?), "black" (?), "blood" (?), and of course "stain" (?).
    • The two middle kanji for can be combined to form "venous blood" (黒血?)


  • (To Tomura Shigaraki) "To truly accomplish anything... one needs will and conviction. Those without it... the weak ones.. They'll be weeded out. It's only natural. That's why you're about to die."[2]
  • (To Kurogiri) "Hero is a title reserved for those who perform truly great feats! Too many are undeserving... Just money worshipers playing hero! Until this society wakes up and rectifies itself... I will continue to do my work."[3]
  • (To Tenya Iida) "Forget about yourself for a second and try saving others. Don't wield your power for your own sake. Because getting trapped by your own hate and acting out of pure self-interest... makes you the furthest thing from a hero."[4]
  • (To himself) "Both this sham-filled society... and the criminals who wield their power in the name of petty mischief... are targets of my purge... All for the sake of a better society..."[5]
  • (To various heroes and U.A. students) "If I don't fix it... if someone isn't... stained with blood...! If heroes aren't restored...!! Come! Just try me... you fakes! The only one allowed to kill me is... All Might, a true hero!!"[6]


  1. My Hero Academia Anime: Episode 37.
  2. My Hero Academia Manga: Chapter 49 (p. 11-12).
  3. My Hero Academia Manga: Chapter 50 (p. 7).
  4. My Hero Academia Manga: Chapter 51 (p. 13-14).
  5. My Hero Academia Manga: Chapter 55 (p. 18-19).
  6. My Hero Academia Manga: Chapter 56 (p. 6-8).

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