When ‘Seven of Nine’ (‘Seven’ for short) was first introduced in season 4 of Star Trek: Voyager in 1997, she became one of Star Trek’s major mainstream celebrities, joining the likes of Capt. Kirk, Mr. Spock, Dr. McCoy, and Scotty.
Born Annika Hansen, she is the daughter of Magnus and Erin Hansen who were both assimilated by Borg ca. 2356, with only her aunt Irene Hansen as sole known surviving relative.
Designated by the Borg as ‘Seven of Nine, Tertiary Adjunct of Unimatrix Zero One’, she was disconnected from the Borg collective mind through the neutralization of the upper-spinal column neuro transceiver, performed by Emergency Medical Holographic program.
In total, I have extracted eighty-two percent of her Borg hardware implants. The remaining bio-implants have been stabilized and remain critical to her life support. I have also stimulated her human metabolism and immune system, though the Borg Nanobots in her bloodstream will more than suffice until she has stabilized. Hair follicles have been repaired and stimulated. The left eyepiece has been replaced by an artificial organ replacement, simulating her own organic eye.
– Medical Records of EMH Program AK-1
Annika’s parents were last reported to be leaving a remote outpost in the Omega sector, headed towards the Delta Quadrant in a small vessel The Raven. It is possible that the Hansen family were the first humans to be assimilated by the Borg.
The lingering psychological effects of once being a drone was a reoccurring theme in several episodes, as Seven was forever marked by her experience as a Borg drone, both mentally and physically. Her remaining implants necessary for her to survive and function in society, and her memories of her time spent as a part of the collective will always impact how she looks at and views society.
She will grow to accept her past as a part of the Borg and look ahead into her future, learning to socialize with humans, have meaningful relationships, and participate in a free open society as an individual.
Seven of Nine was played by Jeri Ryan for four Voyager seasons, featured in many episodes despite coming later to the series. Her introduction was in the second part of the episode “Scorpion”, the first episode of the fourth season.
The initial Borg outfit took some two and a half hours for Ryan to get into, but an error in measurement did not accurately take into account the prosthetics that she was required to wear for the part, which ended up cutting off the blood supply through her carotid artery, causing her to Ryan pass out on two occasions. A nurse had to supply her with oxygen twice, promoting production to modify the uniform.
Once the character had the majority of Borg implants removed, Ryan wore a silver jumpsuit for the first few episodes, was later substituted due to impracticalities of wearing it, and indeed overemphasizing her sexuality, by portraying the female character in a revealing costume. Nevertheless, the crew of Voyager quickly realizes that she is an incredibly formidable, proud, intelligent, and private character.
Seven was later received as one of Voyager’s crew in a Spock-like role, alongside Tuvok, an expert in science, physics, mathematics, and everything in between. With her ‘blonde bombshell’ appearance balanced by intelligence, boldness, rationality, and almost complete lack of interest in the opposite sex.