Though a skilled engineer, she still felt uncomfortable in her position even nine months after her promotion, specifically with her social skills. This prevented her from engaging in any romantic relationships during her time on the da Vinci. (CoEeBook: Troubleshooting)
Between 2381 and 2382, Harry Kim and Conlon entered into a romantic relationship. (VOYnovel: Protectors) Nancy also had a close relationship with B'Elanna Torres as Nancy often babysat for Miral Paris. It is worth noting that Conlon and Kim's romance was problematic as Conlon had trouble committing to a relationship. Conlon's body was taken over by an alien entity. The possession triggered an auto immune disease that caused her DNA to lose the ability to self repair, and would kill her eventually. It was also revealed that she was pregnant with Harry Kim's child and the child's stem cells might be an important key to healing Conlon's condition.