At its core, Satanophany explores a terrifying phenomenon known as . This illness transforms ordinary young women into ruthless killers by giving them a "Base"—a secondary personality modeled after history's most notorious serial killers.

The series suggests that these murderous split personalities are developed through mirror neurons, allowing prisoners to inherit the habits and instincts of their "murder models". Why the Raw Manga for Chapter 291 is Trending

For fans tracking the latest developments, Chapter 291 marks a critical juncture in the ongoing survival struggle within Haguro Prison. The Evolution of the Medusa Syndrome