Seven of Nine (full Borg designation: Seven of Nine, Tertiary Adjunct of Unimatrix 01) was a Human female who was a former Borg drone. She was born Annika Hansen on 1423 N.E, the daughter of eccentric exobiologists Magnus and Erin Hansen. She was assimilated by the Borg in 2356 at age six, along with her parents, but was liberated by the crew of the USS Voyager in 2374. She joined the crew and returned to the Alpha Quadrant with the starship in 1885 N.E.