Quick Facts:

• Species: Human (assimilated by Borg as a child but severed as an adult, retaining portion of cybernetic implants)
  
• Full Name at Birth: Annika Hansen
  
• Parents: Magnus & Erin Hansen (both assimilated by Borg ca. 2356); only known surviving relative is an aunt, Irene Hansen
  
• Place of birth: Tendara Colony, SD 25479
  
• Marital status: Single
  
• Last recorded assignment: U.S.S. Voyager (no formal assignment or rank)
  
• Current status: Returned to Alpha Quadrant with Voyager in 2378
  
  

Complete Bios:

FROM STARTREK.COM

The Borg formerly known by the designation "Seven of Nine" has been disconnected from the Borg collective mind through the neutralization of the upper-spinal column neurotransceiver. 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. Left eyepiece has been replaced by an artificial organ replacement, simulating her own organic eye.

Starfleet records indicate that Seven of Nine was formerly Annika Hansen. 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.