Nobel Prize

The Eternity Devil keeps chewing through Denji until the blood loss forces his chainsaw arms to withdraw. The creature gloats, only for Denji to bite back and bring his chainsaws roaring back to life. Himeno watches and drifts into a memory of Kishibe at a graveyard, where he remarks that the finest Devil Hunters are the ones with a few loose screws, their fearlessness weakening the devils they face. He cautions her about Aki's earnest resolve to slay the Gun Devil and tells her to ready him as fast as possible. Unsettled, she later proposes Aki take a softer post in the Civilian Sector, but he refuses outright. She feels sure the Gun Devil would end him, though a flicker of doubt lingers.

In the present, Denji keeps ripping into the Eternity Devil before collapsing from exhaustion, and the devil celebrates too soon. Himeno deploys the Ghost Devil to yank Denji's cord and rouse him. He then realizes that swallowing the Eternity Devil's blood rapidly mends his injuries and restores his stamina, letting him attack without pause, and Himeno trusts that this very madness could topple the Gun Devil. Three days on, the worn-out group agrees to go drinking once they get out. Reduced to shredded remains, the Eternity Devil bares its heart and begs Denji to end its torment, which he does with the offhand line about it already being over.

Denji bites the Eternity Devil to recover his chainsaws after losing them to blood loss. A flashback shows Kishibe warning Himeno about Aki's drive against the Gun Devil and pushing her to train him quickly. Himeno revives the collapsed Denji using the Ghost Devil. Denji learns he can heal by drinking the devil's blood, fights on indefinitely, and finally kills the Eternity Devil at its own request after three days.

Nobel Prize closes the Eternity Devil arc in Volume 3 and was adapted in Episode 7 of the anime. The chapter marks the death of the Eternity Devil and seeds the looming conflict with the Gun Devil through Kishibe and Himeno's exchange. Arai, Kobeni, Power, Meowy, and Pochita also feature among the cast.