Castle Sinister

A conscientious objector who secretly works for British Intelligence. He navigates family politics with restraint and protects the Glenye honour, even as he hides Nigel’s complicity. His strategic milieu shapes the investigation and the eventual revelation of truth.

The glamorous yet cowardly son who hides a still-injured leg to avoid the war. He becomes the Phantom, collaborating with Selwyn to leak secrets, driven by jealousy and a need to prove himself. His rebellion leads to his downfall and a final act of betrayal.

A scheming officer who courts Nazi sympathy under a medical guise, secretly plotting to steal Britain’s war plans. He manipulates Nigel and uses authority to forward his schemes. He dies in a climactic blaze of gunfire and betrayal.

The aristocratic matriarch wary of Selwyn’s influence and protective of her family’s honour. She distrusts outsiders and remains vigilant as secrets unravel. Her presence anchors the social stakes of the estate.

War Office investigator sent to uncover the truth behind Matthews’ death and the missing plans. He pursues the trail of deception, recognizing when to press for answers and when to shield the truth to preserve lives.

The estate housekeeper who witnesses strange events and provides grounded, practical observations amid mounting tension. Her role highlights the human costs of the intrigue within the Glenye estate.

The local contact who explains the backstory in a flashback, grounding the plot in the estate’s history and the pre-war dynamics that lead to present danger.