Seven of Nine


 * ''For the mirror universe counterpart see Annika Hansen (mirror).

Seven of Nine, born Annika Hansen, was a human assimilated as a child by the Borg. In 2374, she joined the crew of the USS Voyager (NCC-74656), where she became commonly known as "Seven", and returned with the ship to the Alpha Quadrant in 2378.

Star Trek: Confederation
The Confederation of Earth's nanoprobe was going though a reversion process. Kathryn Janeway and Seven of Nine were recruited to rectify the issue and Seven of Nine's Borg nanoprobes were used to fix the Confederate nanoprobe and information regarding Particle 010 was extracted from Seven's brain. (Star Trek: Confederation: "Prophets, Seers, & Revelators")

Seven of Nine was also involved with the United Federation of Planets and Confederation of Earth coventure and field test of the parallel slipstream drive aboard an Intrepid-class starship called Voyager (not NCC-74676, but registered NX-74647). (Star Trek: Confederation: "Field Test")

Between 2378 and 2381, Seven of Nine worked sporadically with Doctor Michael Newton and his research team at the Daystrom Institute annex on Galor IV. Her primary purpose was in providing the team with intricate data on transwarp drive and the quantum slipstream drive in the hopes that it could be used to perfect the black hole propulsion drive.

Once that work was completed, Seven assisted the team in refitting the science vessel, USS Infinite, for extensive travel using the propulsion drive. ("Happy Endings?", "Infinite")

Star Trek: Pioneer
In an alternate timeline in 2401, Seven of Nine (now Annika Hansen) was a leading member of the Federation Rebellion and commanded the USS Christopher Pike (with Alexander Munro) and the entire rebel fleet at the Battle of Andor. The battle was disastrous; however Annika managed to escape with the remainder of the fleet to the Gamma Quadrant. (Star Trek: Pioneer: "Destiny of Freedom, Part 1")