Seven of Nine is the love interest of The Doctor and later Chakotay from Star Trek: Voyager.
She was first seen arriving on the starship Voyager as Kathryn Janeway forged an alliance with the Borg. She was assigned by the Collective to work with the Voyager crew, as Chakotay took Janeway's place while Janeway was injured. She wanted the crew to go to another cube. However, Chakotay would not allow it. Janeway was finally recovered and went back to command. After Kes departed from the Voyager crew, Seven took her place and joined the Voyager crew. She first met the Doctor and he was responsible for the removal of Seven's implants. He also created a holodeck simulation of Voyager for her to make her more comfortable. Seven is also shown to have a good singing voice. She and the Doctor sang in a duet. The Doctor had found himself falling in love with Seven, but he wouldn't admit it to her.
However, she tells him she no longer need the lessons in romance because there were no suitable mates aboard, making the Doctor very disappointed. The Doctor thinks he is going to die, but he finally aditted his feelings for her. The Doctor was also crestfallen when he learned that Seven was going to date Chakotay. Seven begins a romantic relationship with Chakotay during her holodeck simulation of Voyager. She became his love interest and went on several dates with him. After the Doctor removed the affected implants on her, she was free to become involved with the real Chakotay and the two finally began dating. In an alternate timeline, Janeway reveals that Seven of Nine and Chakotay were married.