Shie Hassaikai

Shie Hassaikai (死穢八斎會) also known as the Eight Precepts of Death is a Yakuza Organization founded and lead by Overhaul.

History
The Eight Precepts of Death is a criminal organization founded by Kai Chisaki. Chisaki was raised by a Yakuza man known only as "The Boss". The Boss believed that gangsters would only follow a boss with a code and morals. The boss's generation ran the criminal underworld until the rise of All Might and Heroes. Chisaki feels he needs to restore the Yakuza to their former glory because he owes the boss a great debt.

Chisaki developed a plan to use the Boss's granddaughter Eri to create a drug that could destroy people's Quirks. Eri possesses a Quirk that could rewind genetics far enough back that their Quirks will disappear. Chisaki would use his own Quirk to infuse her DNA with drugs that could erase Quirks.

Chisaki believed they could cull the Heroes by developing "Quirk-Killer Bullets" and distributing throughout Japan. This would bring guns back to prominence as a legitimate threat to people. Then the Yakuza would sell a cure to the Heroes after the plan gets in motion. By controlling an entirely new market for Quirks, Chisaki could reinstate the Yakuza as the biggest superpower in Japan. He would achieve his goal of getting rid of Quirks and returning the world to the way it was before.

This Boss would not consent to Chiksaki's plan. He did not like how Chisaki planned on abusing Eri or how lowly he thinks of humans. The Boss didn't Chisaki involved with drugs and asked him to leave the Yakuza if he refuses to embrace their code of ethics.

Once the boss fell ill, Chisaki took over the Yakuza group as Captain and took on villain names. The small-time Yakuza group soon became a powerful villain organization. Some of the older Yakuza members believe Chisaki is involved in the Boss's illness. Chisaki went ahead with his plan despite the Boss's wishes but still did so with the intention of repaying his debts.

Kai Chisaki took on the name Overhaul and began recruiting members to his cause. He allowed anyone, even those who were considered trash, to join his group as long as they used their Quirk for his ambitions. Overhaul first shared his goals with Joi Irinaka and Hari Kurono, the only two people he grows to trust. Following the fall of All For One, Overhaul believes it's the perfect time to enlist himself as the new lord of darkness.

Internship Arc
The Yakuza are still a small organization on the brink of extinction and do not have ample resources for Overhaul to carry out his plan. The Shie Hassaikai need to collect funds for their operation. They commit a series of unresolved crimes where they escape with the stolen money, including one incident where Overhaul attacks Team Reservoir Dogs. The Yakuza keep their hands clean by using Overhaul's Quirk to heal the people they attack.

The Shie Hassaikai also supply Trigger (a Quirk enhancing drug) to dealers around Japan as a means for income. Overhaul is eventually contacted by Twice and recruited to the League of Villains. Overhaul agrees to meet with the League so he can recruit them to work under him instead. This enrages Big Sis Magne and she attacks Overhaul.

Chisaki is forced to defend himself and uses his Quirk to brutally murder Magne. Compress tries to capture Overhaul, but his reinforcements on standby shoot him with one of the Quirk-erasing bullets. At this stage, the bullets are incomplete and Quirks eventually return. This opening gave Overhaul enough time to blow Compress's arm clean off his body.

Overhaul tries to defuse the situation and tells Tomura Shigaraki to contact him once things have cooled off. The Yakuza continue accumulating funds and experimenting on Eri, but one day she gets away from her minder. Overhaul chases her out into the city streets where she finds solace with heroes in training Deku and Lemillion. They recognize that she's been abused and Overhaul is forced to show his killer instinct.

Eri recognizes his bloodlust and runs back to him so he doesn't attack. He brings her back to headquarters, kills the minder who lost her, and reminds Eri that she's the key to the plan. Mimic interrupts, telling Overhaul he has a call from Tomura Shigaraki with his answer.

A black communion between the Shie Hassaikai and the League of Villains commences a few days later. Tomura meets with Chisaki after being lead through their underground base. Tomura sits down with his feet up and immediately announces that if the League should join forces with Yakuza, it will not be under the Eight Precepts of Death, instead, they will be equals.

Tomura's second condition is that Overhaul shares the details of his plan because the League won't be involved in worthless schemes. Tomura reaches into his jacket and insinuates he has an idea, but Chrono and Mimic threaten him. Tomura is mostly unaffected and demands compensation for the death of Magne. Overhaul calls them off and Tomura reveals the Quirk-Killer Bullet that was used on Mr. Compress and asks if the plan has anything to do with it.

Chisaki invites Tomura to play a game of Shogi but he refuses. Chisaki explains the fun of Shogi is using the opponent's pieces and asks that Tomura lend him Himiko Toga, Twice, or Kurogiri because he doesn't want them moving about. Tomura initially refuses, but Chisaki insists that the League return the favor since Chisaki did reveal his entire plan.

Despite their misgivings toward Overhaul, Twice and Himiko become temporary Yakuza. Overhaul apologizes for killing Magne and asks that the new recruit share their abilities up front. Both Himiko and Twice explain their Quirks and Shin Nemoto uses his own Quirk to make sure they don't plan on betraying the Yakuza. Overhaul asks that as wanted criminals, both the temps stay on base for the time being.

Sir Nighteye's Agency launches a full-scale investigation of the Shie Hassaikai. They recruit several Pro Heroes and heroes in training for an intelligence meeting that ends with the decision to launch an assault on the Yakuza to rescue Eri. Eri's new minder encounters Sir Nighteye at the store while purchasing a toy and this gives Sir Nighteye the location of the Yakuza base. The Police and a large team of Heroes assemble at the Shie Hassaikai HQ a few days later. Overhaul notices they've finally come for him.

Chisaki visits the Boss on his sickbed and apologizes for the upcoming battles by telling his elder it will get a little loud inside the base. The fighting begins at 8:30 AM that day. Rikiya Katsukame launches a preemptive strike against the heroes. Ryukyu's Squad takes him on while the others storm the base. Minor Yakuza thugs try to stop their entry but minor heroes deal with them as the main heroes get inside the base.

Overhaul and Chronostasis take Eri and begin fleeing the base through the underground passageways. Chisaki always figured the Police would catch on, just not this quickly. He refuses to allow himself to be captured and releases the Eight Expendables to buy him enough time to escape.

Battles and Events

 * Shie Hassaikai Raid
 * Ryukyu Squad vs. Rikiya Katsukame
 * Suneater vs. Setsuno, Hojo &amp; Tabe
 * Red Riot &amp; Fat Gum vs. Rappa &amp; Tengai
 * Nighteye Squad vs. Toga &amp; Twice
 * Nighteye Squad vs. Mimic
 * Lemillion vs. Nemoto &amp; Sakaki
 * Lemillion vs. Overhaul &amp; Chronostasis
 * Nighteye Squad vs. Overhaul &amp; Chronostasis
 * Deku vs. Overhaul

Trivia

 * In Buddhism, the Eight Precepts are set of strict moral guidelines to be followed by the most serious of adherents. Kai Chisaki can be seen as the "Bhudda" in this situation. His followers act according to his will and model themselves after him, even wearing the masks like him.

Each of the eight expendables can in some way be related to a Precept through their Quirk or their personality.


 * 1. Kendo Rappa - Avoid killing, directly or indirectly. (Kendo's bloodthirsty nature and excitement for fights is in direct conflict with this precept.)
 * 2. Toya Setsuno - Avoid stealing and taking things without the permission of their owner. (Setsuno's Quirk allows him to steal things from opponents.)
 * 3. Yu Hojo - Avoid wearing jewelry, perfume, and make-up. Avoid singing, dancing or playing music with attachment. (Hojo's Quirk can be related to jewelry.)
 * 4. Soramitsu Tabe - Avoid eating more than one meal that day. (Tabe's Quirk allows him to eat and digest almost anything.)
 * 5. Hekiji Tengai - which forbids taking shelter and resting under a luxurious canopy.(Hekiji's Quirk allows him to to make a shelter to protect himself.)
 * 6. Rikiya Katsukame - Avoid sexual contact. (Rikiya's Quirk saps life force through physical contact and his main opponents are Ryukyu's all-female team.)
 * 7. Shin Nemoto - Avoid lying and deceiving others. (Nemoto's Quirk disallows others from violating this precept.)
 * 8. Deidoro Sakaki - Avoid toxicants: alcohol, tobacco and drugs, except for medical purposes. (Deidoro's Quirk causes others to enter a state similar to intoxication. Sakaki is also an alcoholic.)

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