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 2382Harry Kim and Nancy 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 Nancy and Harry's romance was problematic wherein Nancy had trouble committing to a relationship with Harry for various reasons. Nancy's body was taken over by an alien entity and as a result of the entity's possession of her body caused the triggering of an auto immune disease which caused her DNA to loose the ability to self repair which would kill her eventually. It was also revealed that she was pregnant with Harry Kim's child and the child's stem cells might an important key to healing Nancy's condition.