The Men in Black were mysterious characters who appear in the Akatsuki no Kiseki game. They appear at the "Genter" Orbal Store to monitor Nacht and Chloe in a scamming case.
They are revealed to be the former Revache & Co. henchmen after the mafia's disbandment from the Cult Incident. They tried to start a financial fraud in North Ambria in attempt to gain bail money, but were stopped by the combined efforts of Nacht, Weiss and Ronald. Impressed by their financial skills, Rieve bailed the men out and hired them to her company. Nonetheless to avoid arrest, they accepted.
In Akatsuki, they appear with the names Carlo (カルロ), Cosimo (コジモ) and Mateo (マテオ).