Stories related to her relationship with Captain Janeway and with The Doctor appeared throughout the series some episodes, such as ' The Raven', explored her background and earlier life as Annika Hansen before she was assimilated by the Borg. The character appeared through the final episode, ' Endgame'. The character replaced Kes in the main cast, and was intended to introduce a foil to Captain Kathryn Janeway, similar to the role Spock performs for Captain Kirk in Star Trek: The Original Series. Seven of Nine was introduced in the fourth-season premiere, ' Scorpion, Part II'. While her birth name became known to her crewmates, after joining the Voyager crew she chose to continue to be called Seven of Nine, though she allowed ' Seven' to be used informally. Her full Borg designation was Seven of Nine, Tertiary Adjunct of Unimatrix Zero One. Portrayed by Jeri Ryan, she is a former Borg drone who joins the crew of the Federation starship Voyager. Seven of Nine (born Annika Hansen) is a fictional character introduced in the American science fiction television series Star Trek: Voyager.

Commanding officer, USS Enterprise (NCC-1701-G).

Acting commanding officer, USS Stargazer (NCC-82893).

7 of 9 Tertiary Adjunct of Unimatrix 01.

Raven (child on her parents' research vessel).

Nine work for android enterprise