Molly's grandmother who raised her and passed away before the events of the novel. Gran's love for cleanliness and daily rituals are remembered fondly by Molly throughout the story.

Charles Black's trophy wife who forms a peculiar friendship with Molly. Her character serves as a red herring in the story.

The doorman at the Regency Grand Hotel and an old family friend of Molly. He helps her in times of need and provides access to legal assistance through his daughter.

A detective who misjudges Molly and is involved in the investigation surrounding the events at the hotel.

The hotel manager who appreciates Molly's work but struggles to manage his staff effectively. His character develops as he becomes more aware of the issues within the hotel.

A cook at the hotel who cares deeply for Molly. Their unique relationship provides a romantic subplot.

The head barman at the hotel who is a negative influence, and becomes involved in the story's central conflict.

The head maid who is dishonest and makes life difficult for Molly. She acts as a foil to Molly's character.

Charles Black's first wife, a strong character who plays a crucial role in the unfolding events.

A disreputable character and the victim in the murder mystery at the heart of *The Maid*.