Gun Devil

Stunned that Makima can promise any wish at all, Denji immediately asks what the Gun Devil is capable of. She traces its emergence to an event thirteen years earlier, when mounting dread over firearms, fueled by their heavy use in both devil hunting and society at large, finally gave the creature form. It surfaced amid a massive terrorist attack on American soil.

A memory unfolds of a young boy named Taiyo reading at home with his parents while his older brother coaxes him outside for a game of catch in the snow. The brother insists the boy pull on a pair of gloves first. The moment Taiyo steps back indoors, a single blast from the Gun Devil wipes out both him and the house in an instant.

The recollection widens to chart the Devil's rampage across the globe, with millions slain in less than five minutes of coordinated strikes. In the present, Makima notes that it has not been seen since, prompting a worldwide ban on firearms and a surge in Devil strength as fear thickened everywhere. Denji confesses the tale lost him partway through, yet he brashly swears to defeat the Gun Devil regardless.

Makima reveals that scattered fragments of the Devil's body survived as residue, and that gathering and rejoining those pieces would let the Gun Devil be called back and destroyed for good. Attention turns to Aki and Himeno retrieving one such fragment, exposing that the older brother from the memory was Aki himself. Denji, Aki, Power, and Himeno are then ordered to hunt a formidable Devil lurking in nearby Hotel Morin, believed to have swallowed a piece of the Gun Devil.

Collected in Volume 2 and tied to the Eternity Devil arc, this chapter is adapted in Episode 5 of the anime. It anchors the series' central plot by establishing the Gun Devil as the great target and by linking Aki's personal loss to that enemy. Characters present include Makima, Denji, Aki Hayakawa, Himeno, Power, Hirokazu Arai, and Kobeni Higashiyama, with Taiyo Hayakawa shown in flashback.