The Nuclear Weapons Devil personifies humanity's terror of the atom bomb. Pochita swallowed it long ago, erasing nuclear arms from the world, an act that sets the Horseman Yoru chasing the Chainsaw Man to force them back into being.
No one has laid eyes on the Nuclear Weapons Devil; its form stays undocumented.
In the same way, nothing of its character or temperament has ever come to light.
Before the story begins, Pochita consumes the devil, and with it nuclear weapons disappear from the world. That loss drives Yoru, one of the Four Horsemen, to hunt the Chainsaw Man, set on forcing him to disgorge the weapons she craves. During the War Devil arc, Yoru learns that conflict has broken out between the United States and the Soviet Union, with the American side loosing a devastating atomic weapon against several Soviet cities; built around atomic energy and first meant for use on devils, it is turned instead toward ending the war. The spectacle finally jogs her memory of nuclear arms. She concludes that Pochita never coughed the devil back up, and that mankind simply reinvented the weapons from nothing. As a fear-born devil, it is implied to wield enormous destructive force, though its specific powers remain unknown.

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Yes, the Nuclear Weapons Devil personifies humanity's terror of the atom bomb. Pochita swallowed it long ago, erasing nuclear arms from the world, and it is mentioned in Chapter 84.
The Nuclear Weapons Devil embodies humanity's terror of the atom bomb, with a power source described as nuclear anxiety, or nucleomituphobia. As a fear-born devil, it is implied to wield enormous destructive force, though its specific powers remain unknown.
Before the story begins, Pochita consumed the Nuclear Weapons Devil, and with it nuclear weapons disappeared from the world. That loss is what drives the Horseman Yoru to chase the Chainsaw Man.
Because Pochita erased nuclear weapons by eating the Nuclear Weapons Devil, Yoru, one of the Four Horsemen, hunts the Chainsaw Man set on forcing him to disgorge the weapons she craves. During the War Devil arc, an atomic strike between the United States and the Soviet Union finally jogs her memory of nuclear arms.
No, no one has laid eyes on the Nuclear Weapons Devil; its form stays undocumented, and nothing of its character or temperament has ever come to light.
Looking for more on Nuclear Weapons Devil? The Chainsaw Man Wiki on Fandom has a dedicated page with community notes.
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