Akaguro Chizome

" '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.' "Akaguro Chizome (赤あか黒ぐろ血ち染ぞめ, 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

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Appearance
Akaguro Chizome is a tall, gaunt man who walks with a distinctive hunch. Muscular and intimidating, he hulks over most others. He has a long, bumpy tongue that he uses as both a psychological warfare technique and as part of his quirk. His face is heavily scarred, especially around his reconstructed nose, which was done recently; whether he cut if off himself or whether it was cut off by his mother is up for debate, as he has said both scenarios at different points in time.

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. His hair is naturally blond but he regularly dyes it black, including his eyebrows.

As a young man, he wore the stereotypical officer uniform of the Akaguro ninja corps.

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 yellow 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.

Recently, he has begun wearing a combination of his 'Stain' gear and his 'Stendhal' gear.

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Personality
Akaguro Chizome is a cold, mercilness, and unforgiving man with a powerful sense of duty. He has an intense desire and will to cleanse society of false heroes. He used to believe only All Might was a true hero but has recently become disillusioned, now believing that the current social model of what a 'hero' is only taints even those who aspire to heroism and wishes to completely tear the model apart.

He dislikes needless bloodshed and cruelty and often butts heads with his various allies because of it; while he is willing to kill and attack even children for his goals, he refuses to shed more bled than he considers necessary. He has come to blows with Shigaraki Tomura, Adachi Yuudai, and his own mother, Akaguro Kannon, because of this. He was reluctant to attack Iida Tenya before the teenager provoked him and later spared Midoriya Izuku because he showed 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.

His conviction and intensity can grow so powerful that he is capable of giving an incredibly murderous aura and bloodlust that is so strong that it can paralyze heroes in fear. His confidence in this ability is powerful enough that he is willing to challenge several pros at once even while majorly injured.

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 Hachisuka Kuin as a means to an end. During this time period, he struggled massively with his morals and his behavior in and out of uniform, also stemming from his childhood within the Akaguro clan where he was encouraged to commit atrocities at a young age. He attempted to view his civilian and vigilante identities as two separate entities, utilizing his mask as a way to separate his personas. After his confrontation with Knuckleduster caused him to change his beliefs, he started to think that 'false heroes' are the reason for society's problems and set out to 'fix' things.

A complicated man, he has many aspects that he shows different people- the cruel, taxing trainer and uncle for Bakugou Katsuki, the monstrous serial killer to most heroes, a dangerous but principled man to many vigilantes, and so on and so forth. He chose to stand aside and allow his younger sister to abuse his nephew but also defended him against his clan when they would have had his nephew assassinated after a failed attempt at creating a hitobuki, even in the face of losing his status within the clan. For most of his students, he has been a fair but strict teacher, but for his nephew, he is incredibly demanding and cruel, partially as a way to try and convince him to leave, partially as a way of proving his loyalty to his family, and partially as a way of trying to get him the skills he needs to survive the viper pit that is both the hero industry and the Akaguro clan.

As a child, he witnessed the murder of his older sister's boyfriend and began to realize the darkness of the world he inhabited; the seeds of his rebellion were sown.

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Abilities
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 injured 23 others to the point of being unable to make a full recovery prior to his stay in Tartarus, and has now murdered upwards of 32 Pro Heroes and permanently disabled 46 others since his escape.

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's reputation and abilities garnered the attention of Shigaraki Tomura, 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.

Immense Speed: His most powerful asset, Stain's speed is unmatched.

Enhanced Strength: Stain has considerable strength, especially when utilizing his sword.

Immense Stamina: Stain has an extremely high pain threshold and is able to push past injuries that would stop others in their tracks, such as cracked skulls or perforated lungs via broken ribs. He has stayed standing 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 Shigaraki Tomura and the League of Villains were behind the attack. He also keeps a knife under his sleeves in order to surprise his opponents in the event that he is deprived 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 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.

Quirk
Bloodcurdle (凝血 Gyōketsu) is an Emitter-type quirk. It allows him to paralyze people after tasting their blood.

The amount of time a victim remains paralyzed depends on their blood type; in descending order from longest to shortest duration, they are: B, AB, A, and O. The maximum amount of time anyone can be paralyzed is eight minutes.

Stats
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Trivia

 * Stain is a Leo
 * He was born in the Year of the Ox
 * Chizome's name contains the kanji for "red" (赤), "black" (黒), "blood" (血), and of course "stain" (染).
 * The two middle kanji for can be combined to form "venous blood" (黒血)
 * He was downgraded to the rank of Yondan within the Akaguro clan

Quotes

 * (to Tomura) "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."
 * (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."
 * (to Iida Tenya) "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."
 * "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..."
 * "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!!!"
 * (to Naoki) "Is this why your heroes are so coddled I could kill them with ease?"
 * (to Rose) "Will you crucify him for an idolization almost every little child in the country had?"
 * "Ok boomer."
 * (to Blake) "Care is a weakness I cannot afford."