Seven of Nine

Seven of Nine

Promotional image of Jeri Ryan as Seven of Nine in Star Trek: Voyager
Species	Human Former Borg drone
Affiliation	United Federation of Planets Borg Collective Starfleet
Posting	Astrometrics USS Voyager
Portrayed by	Jeri Ryan Katelin Petersen (as young Annika Hansen in "Scorpion: Part 2", "Dark Frontier" and "The Raven")

Seven of Nine (born Annika Hansen) is a fictional character who appears in seasons four through seven of the American science fiction television series Star Trek: Voyager. Portrayed by Jeri Ryan, she is a former Borg drone who joins the crew of the Federation starship Voyager. Her full Borg designation is Seven of Nine, Tertiary Adjunct of Unimatrix Zero One (or Seven of Nine, grid Nine-Two of Subjunction Twelve). The character Seven of Nine arrived just as the character Kes was leaving, and was intended to introduce a foil to Captain Kathryn Janeway in a similar manner as Spock in Star Trek: The Original Series.

Seven was introduced in the second part of the episode "Scorpion", the first episode of the fourth season. The character continued to appear throughout the series until the final episode, "Endgame". Stories related to her relationships with Captain Janeway and The Doctor appeared throughout the series, and she was involved in a romantic relationship with Chakotay towards the end of season seven. Several episodes such as "The Raven" explored her background and younger life as Annika Hansen before she was assimilated by the Borg.

Following the third season of Star Trek: Voyager, the production team decided that the main cast character of Kes was to be dropped from the show. It was decided that Captain Kathryn Janeway needed a contrasting character, and so Seven of Nine was developed to provide this new angle. In addition, it had been a previous Star Trek staple to have a character that could provide a third-person view on the human condition. Prior examples had been Spock in Star Trek: The Original Series and Data in Star Trek: The Next Generation.