Seven of Nine

Seven of Nine, or just Seven for short, was a former Borg Drone and crewmember of the USS Voyager. She joined the crew later on in their journey after she was sent to the ship as a Borg drone to assist in a brief alliance between the Borg and the crew of Voyager. The Borg were unable to prevent her from being rehabilitated by the crew of the Voyager and they severed her link with the Borg Collective, allowing her to be an independent individual. After physically reconstructing her to resemble a human, the crew healed the scars of her Borg assimilation and allowed her to join the crew.

Despite initially wanting to rejoin the Borg Collective, Seven quickly came to like the crew and the ship, even allowing herself to engage in a romantic relationship with Chakotay. However, the Borg Queen came close to convincing her to rejoin the collective even after years of being free, showing that she still in a sense wished she was back with her Borg buddies. Seven became the ship's Science Officer in a sense, and advised them on tactics to use against the Borg.

She came to respect Kathryn Janeway and saw her as her friend and liberator. However, Seven had a tendency to go crazy at times, usually to do with ghostly echoes from her time as a Borg Drone. This made others cautious of her, even the headstrong Torres, but Seven eventually learned to adjust properly to Human life.