A human exobiologist who set out with her husband Magnus and young daughter Annika to study the Borg aboard the USS Raven and was assimilated along with them.
Erin Hansen is the mother of Annika Hansen, the girl who became Seven of Nine. She is seen in childhood memories in the fourth-season Voyager episode The Raven and at greater length in Dark Frontier.
Erin and her husband Magnus were exobiologists with unorthodox theories about a little-known cybernetic species. In the 2350s they took their small daughter aboard the research vessel Raven, followed a Borg cube through a transwarp conduit into the Delta Quadrant and spent a long period observing drones at close range from behind special shielding.
The shielding eventually failed and all three were assimilated. Seven's recovered memories of her parents' last moments, and later her reading of their field journals, shape her return to humanity.