A brilliant and eccentric detective confined to the Nursery, who partners with Stephen to solve the murder using her sharp intellect and scientific reasoning.

The Head Butler at Tithe Hall, a master of the perfect servant role who harbors a complex and secretive past tied to the house and its occupants.

A ladies’ maid with a hidden agenda and sharp mind, who uses her perceived vulnerability to navigate Tithe Hall unnoticed.

The murder victim, an arrogant Viscount whose actions and beliefs set the stage for the unfolding events at Tithe Hall.

A Member of Parliament and Lord Conrad’s cousin, focused on maintaining the family’s public reputation amid the murder investigation.

A Scotland Yard inspector characterized by his incompetence and reliance on pseudoscience, contrasting with the novel's more capable investigators.

Relatives of the Viscount; Lettice is manipulative and focused on financial gain, while her grandson Gilbert adds macabre humor with his blunt observations.

A relative providing dark comedy through his drunken antics, contrasting with the more serious elements of the story.

The first footman, whose insecurity and aggression create tension with Stephen and highlight servant hierarchies.