Great Cataclysm arc

The Great Cataclysm arc is the twenty-fourth and final story arc of the Fire Force manga series.

Summary
Large scale fires and Infernal outbreaks begin to happen across the Tokyo Empire as the Cataclysm begins. With doppelgängers appearing in front of their human counterparts to attack them. The Eight Pillars remain inside Adolla as a weeping Haumea tells them the Evangalist's story is ending now. The citizens recognise this as the Great Disaster described in their Church's teaching while the Fire Force try to find a solution. Using Joker's insight into Adolla and the world, Company 8 conclude that despair and humanity's view of the future is defining reality. Licht and Obi reason that this means restoring hope and envisioning a solution will overturn the Disaster. Contacting the other 7 Fire Force Captains, Obi quells their fears and tells them they need to be the heroes of the country to inspire change. Meanwhile, Arthur enlists Vulcan's aid to complete a ritual that will allow him to defeat Dragon. This determination does not go unnoticed by Dragon, who senses Arthur's resolve and decides to return to the Earth for another battle.

Despite Company 8's work protecting people and evacuating the city there is no real change in events. Licht grimly theorises that The Evangalist's plan, the story of their lives, gives some people more control over the world than others. The issue being that protecting the masses alone will do nothing as the general public get swept up by those who drive events forward. This theory proves its merit as Faerie oversees doppelgängers attacking high ranking members of the Fire Force with the intention of breaking their faith. Pan stares down the monstrous doppelgänger of Captain Hague while Karim and Company 1 are attacked by the doppelgänger of Rekka Hoshimiya. Pan quickly finds his resolve to protect his mentor's memory and destroys the copy with his Rending Multi-Stacked Drill after a short but brutal struggle. Karim struggles to recognise the double as anything but the original, as it is identical in appearance and personality to his fallen friend. Recognising that Karim's guilt over Rekka's death and also unwittingly supporting his criminal desires is the cause of this conflict, Captain Li stands back and lets his Lieutenant find the answer to his problems. When Thermoacoustic Refrigeration clashes with Star Fist Punch, the two former friends try to understand each other during the stalemate. Li's advise to move forward beyond Rekka's death and accept himself pushes Karim forward. Finally accepting Rekka's death and evil ambitions allows Karim to accept his honesty and companionship as well. Realising that they were friends; Karim truly makes peace with Rekka's actions and his own feelings as he manages to overwhelm and defeat him once more. This allows Karim to value his future and hope.

Arriving at Special Fire Cathedral 8, Vulcan follows Arthur inside to aid in whatever trail the Knight has planned.