12 : Seraph - Of The End

: It is revealed that the Seraph project isn't just a weapon; it was originally a taboo experiment intended to revive the dead .

The 12th chapter of the manga focuses on the immediate aftermath of Yuichiro’s first "berserk" transformation. It introduces the darker side of the Moon Demon Company’s methods, specifically the use of experimental drugs to control the demonic powers within the soldiers, setting the stage for the human experimentation themes that dominate later arcs. 12 : Seraph of the End

: Ferid and Crowley Eusford approach the Shinoa Squad with a "suspicious proposal" to join forces, further blurring the lines between hero and villain. Chapter 12: "A Very Safe Supplement" : It is revealed that the Seraph project

: The failed escape resulted in the massacre of their "family" by Ferid Bathory. This specific age marks the end of Yuichiro's childhood innocence and the beginning of his four-year journey toward revenge. The Revelation: Manga Volume 12 : Ferid and Crowley Eusford approach the Shinoa

: The episode introduces heavy foreshadowing regarding Guren Ichinose’s true motives. A mysterious rooftop meeting and Guren's refusal to share information with Shinoa suggest that the humans may be just as "monstrous" as the vampires they fight.

: The volume suggests that the 2012 apocalypse was actually triggered by Guren himself to resurrect his fallen comrades, a secret he has carried while manipulating Yuichiro.