The arc could involve Bail as the mastermind behind the gruesome crimes that Rogue is investigating. Bail, leveraging his oligarch influence and access to powerful technologies, has been secretly controlling a humanoid, typically under Heaven's control, by hacking it. This rogue humanoid, manipulated by Bail, is responsible for a series of kidnappings.

Initially, the kidnappings are attributed to an Archeston citizen, possibly one who conceals their identity with a hood. However, as the investigation progresses, it is revealed that the true perpetrator is the humanoid, not a human. This humanoid has been abducting women and delivering them to Bail, who then commits unspeakable acts upon them.

The humanoid becomes infamous as a serial killer known as "The Tooth Fairy," due to his chilling signature—kidnapping victims from their beds at night and leaving behind only their teeth, perfectly dissected and clean, placed under their pillows.