Mrs Christina Murdoch is the housekeeper for the Adams' family house in Dulwich, London.
She is the one who opens the door when Matthew Freeman arrives at the Adams' house. She informs him that he just missed Scarlett, who left a couple of hours ago.
She is a small woman with dark hair.
She does not have much of a sense of humor. Although Scarlett and Mrs Murdoch have silently agreed that they? were never going to be friends although they got on well enough, Mrs Murdoch is very worried when Scarlett disappears during her school trip.