Shie Hassaikai Arc
A raid to save a girl from a yakuza's Quirk-erasing experiments.
The Shie Hassaikai Arc is a dark turn in My Hero Academia, shifting focus from school heroics to organized crime. It centers on the Shie Hassaikai, a yakuza group experimenting on their boss' granddaughter Eri to produce Quirk-Destroying Drugs. Multiple Hero agencies, led by Sir Nighteye's team, raid the Shie Hassaikai's base to save Eri. The League of Villains also comes into conflict with the group, and the remaining drugs are stolen by the League after the raid.
- Primary Antagonist
- Kai Chisaki (Overhaul)
- Key Protagonists
- Class 1-A, Eraser Head, Sir Nighteye
- Central Conflict
- Rescue of Eri from the Eight Bullets
- Major Location
- Shie Hassaikai Headquarters
- Narrative Impact
- Establishes Overhaul as a top-tier threat and deepens the lore surrounding Quirk
Lore & Background
The Shie Hassaikai is a yakuza group experimenting on their boss' granddaughter Eri to produce Quirk-Destroying Drugs. Multiple Hero agencies, led by Sir Nighteye's team, raid the Shie Hassaikai's base to save Eri. During the raid, Nighteye is killed, Mirio is de-powered, and the remaining drugs are stolen by the League of Villains. Eri is adopted by the U.A. staff, and she trains her 'Rewind' Quirk to eventually restore Mirio's Quirk.
In Their Own Story
Three third-year students select Deku, Kirishima, and a pair of Ochaco and Tsuyu Asui to join them as interns. Mirio Togata, the third-year who chose Deku, is interning under All Might's former sidekick Sir Nighteye. Both Nighteye's team and the League come into conflict with the Shie Hassaikai, a yakuza group who are experimenting on their boss' granddaughter Eri to produce Quirk-Destroying Drugs. Multiple Hero agencies, led by Nighteye's, raid the Shie Hassaikai's base to save Eri, during which Nighteye is killed, Mirio is de-powered, and the remaining drugs are stolen by the League. Eri is adopted by the U.A. staff, and she trains her 'Rewind' Quirk to eventually restore Mirio's Quirk.
Reader's Guide
The raid on the Shie Hassaikai base results in the rescue of Eri, but at a heavy cost: Sir Nighteye is killed, and Mirio Togata is de-powered. The League of Villains steals the remaining Quirk-Destroying Drugs, leaving a lingering threat. Eri is taken in by U.A. staff and begins training her 'Rewind' Quirk, with the goal of eventually restoring Mirio's Quirk. The arc shows the students facing the brutal realities of hero work, including loss and the moral complexities of dealing with villains.
Did You Know?
- The Shie Hassaikai is a yakuza group experimenting on their boss' granddaughter Eri to produce Quirk-Destroying Drugs.
- Sir Nighteye is killed during the raid on the Shie Hassaikai base.
- Mirio Togata is de-powered during the raid, losing his Quirk.
- The League of Villains steals the remaining Quirk-Destroying Drugs after the raid.
- Eri is adopted by U.A. staff and trains her 'Rewind' Quirk to eventually restore Mirio's Quirk.
More in Arcs & Major Events
Elsewhere in the My Hero Academia universe
Spotted an error? Know more?
This is a living reference — every entry is fact-audited, and reader corrections feed straight into our audit queue. Suggest an edit · See this site's audit record