"No! Don't make contact with them!" Marvin's expression became much graver, "Freya is the Great Demon Asmode, one of the Supreme Pillars. Ordinary people are no match for her, let alone a mere handgun."
"If Your Majesty has planted a spy by Freya's side, it's very likely she could use them for counter-espionage."
"Asmode possesses the ability to brainwash humans?"
"I'm not sure about that, but demons can possess human bodies. Suppose tonight's assassination was a play directed and acted by Freya herself. Then, after hearing about this, Your Majesty would surely initiate contact with several spies to inquire about the specifics. Wouldn't this reveal your methods of communication to Freya?"
Once the methods of communication were known, the spies planted near Freya would completely go underground. No matter what orders Katerina issued, Freya would be fully aware.