Dark Hero Arc

The Dark Hero Arc is the nineteenth story arc in *My Hero Academia*, and the first story arc in the Final Act Saga.

Hero society has faced a significant decline ever since the Paranormal Liberation War.

Many of Japan's top villains, including All For One, have escaped from prison, courtesy of Tomura Shigaraki.

With the fate of the country in their hands, Class 1-X decides to leave U.A. High School, working alongside All Might and Pro Heroes Endeavor, Hawks and Best Jeanist to track down the remnants of the League of Villains, as well as continue to harness the full power of One For All in preparation for the final battle against All For One and Aisha.

## Events

* Details about before departure from U.A. High are revealed.
	+ The first user's name is revealed to be Yoichi Shigaraki.
	+ The second and third inheritors of One For All originally freed Yoichi from his imprisonment by All For One, and are convinced to lend their support to Class-X.
	+ Upon waking up, Akatani learns that his injuries aren't as severe as before, thanks to his body increasing its capacity of 5% to 45%.
	+ Without telling anyone, Class 1-X must leave U.A.
	+ Before leaving, Gran Torino gives his cape to Akantani.
	+ Hawks also informs Class 1-X that due to them dismantling all of Doctor Kyudai Garaki's facilities, All For One needs Akatani alive to steal One For All.
* The hero students of Ketsubutsu Academy High are one of the groups dispatched to escort any remaining civilians to evacuation points, while keeping a lookout for villains.
	+ Grand and Turtle Neck try to convince a group of civilians to join them when they're suddenly attacked by Muscular.
	+ A hooded Akatani arrives to save them and assist in the fight, where he re-encounters and swiftly defeats Muscular, sending him to prison once more.
		- During the fight, it is revealed that the Quirk of the sixth user, En, is Smokescreen.
		- It is also revealed the users can now freely communicate with Akatani without him being unconscious.
* It's revealed Akatani is now equipped with a new compression support item known as the Mid-Gauntlet, which All Might ordered from overseas, to help support his arms.
* While continuing to apprehend villains, Endeavor, Hawks, and Best Jeanist are berated by a mob of protestors for their prior failures, including stating they know Tomura is after "someone".
	+ Discussing the nature of One For All, Hawks suggests All For One needs Tomura's hatred to steal it because he doesn't carry any himself.
* Akatani is targeted by an assassin sent by All For One to capture him, Lady Nagant.
	+ She is revealed to be a former Public Safety Commission Hero, and Hawks' senior, who he had earlier warned him about.
	+ She worked as an assassin for the Public Safety Commission and killed various villains and corrupt Pro Heroes that threatened the image of hero society.
	+ She became disillusioned with her job and ended up killing the former President of the Commission, though it was reported that she had killed a Pro Hero.
	+ Her Quirk is Rifle, allowing her to transform her right arm into a rifle and shoot up to 3 kilometers.
	+ During the Tartarus riot, All For One personally requested her for the job, giving her his Air Walk Quirk as payment.
	+ She also brings along Kai with her, who she uses to identify Akatani, while he asks to reunite with his boss.
* During their battle, Deku utilizes for the first time the Quirk of the third user, Fa Jin.
	+ Lady Nagant explains her past to Akatani, as they argue about their ideologies about their world.
	+ She attempts to shoot at Kai to disorient him, but Akatani develops the Faux 100 Percent technique, using a combination of Blackwhip, Fa Jin, and One For All 45%, to save him, and then eventually defeat Lady Nagant.
	+ He rescues her, believing she still has the soul of a hero, while she acknowledges him as a true hero.
* All For One executes a fail safe within Lady Nagant for failing her mission, causing her to self-destruct.
* Lady Nagant and Kai are apprehended by the heroes.
	+ Lady Nagant manages to survive the explosion and tell Deku about All For One's location.
	+ Akatani agrees to fulfill Lady Nagant's promise to Kai and let him apologize to his Boss if he also apologizes to Eri.
* Class 1-X storm the former Creature Rejection Clan hideout, only for it to be a trap by All For One.
	+ A pre-recorded message from All For One reveals he no longer cares about All Might and tells Akatani it's "his turn".
* The Lurkers are revealed to know the truth behind One For All and suggest revealing the truth to more Heroes for help.
* Death Arms is revealed to be one of the heroes who has retired, unable to handle all the stress and criticism.
* Shoto attempts to contact Endeavor, but is ignored.
* Akatani easily dispatches the second assassin.
	+ Stain secretly watches them from afar.
* Endeavor reveals they've received word that overseas heroes will be arriving to assist them soon.
* Rumors begin to spread as people talk about Deku's new "heroic" persona, with some believing him to be a Nomu or All For One's subordinate.
* Principal Nezu implements the "U.A. Barrier", a security system previously installed for the Culture Festival, which encompasses the entire surrounding area of U.A., turning it into an impeccable fortress on par with Tartarus.
	+ Each section of the school is connected to an underground emergency shelter, which can then travel through a network of tunnels underneath the school in case of an emergency, which itself is fortified with layers of steel built to detect unusual activity.
	+ Nezu personally worked, and paid for himself, to redesign the defense system to withstand Tomura's Decay.
	+ Shiketsu High created a similar defense system after the "imposter incident", and has formed an alliance with U.A.
	+ It is revealed most civilians have been escorted to the various evacuation centers, with the only holdouts being the anti-hero vigilantes and the violent pillagers.
* It is revealed that since Oboro's re-awakening, Kurogiri was relocated to Central Hospital for restorative research.
* All Might finally meets and encounters Stain in person.
	+ The Hero Killer provides All Might words of advice, as well as information he had collected when he escaped from Tartarus.
* The heroes learn that Tomura requires two months of rest until his body is complete, so they have about one month until he is.
	+ However, the information from Stain, which is revealed to be data on the attack on Tartarus, unveils a conversation between All For One and his vestige within Tomura using the Radio Waves Quirk, revealing Tomura will be complete in just 3 days.
* All Might requests immediate assistance from the foreign heroes, which the nations of the world discuss about, while America's No. 1 Pro Hero, Star and Stripe, heads over immediately to help.