Nancy's investigation is driven by the effort to locate Mary.
Nancy investigates Mary's disappearance and plans an operation to find and rescue her.
Their friendship provides Nancy with practical and emotional support.
Ted is described as Nancy's neighbor and best friend, and he assists her throughout the investigation.
Carson is Nancy's father and a trusted legal and investigative ally.
The plot explicitly identifies Carson Drew as Nancy's father, and Nancy seeks his help when the kidnapping case escalates.
Explore the full interactive character relationship map of Nancy Drew… Detective
Related entry on Wikidata (Q1076932), public domain (CC0).