Seven of Nine (Star Trek Voyager/Star Trek Picard)

Seven of Nine, also referred to by her birth name, Annika Hansen, a former Borg drone, assimilated by the Borg at the age of six under the designation of Seven of Nine, Tertiary Adjunct of Unimatrix 01, she was liberated by the crew of the USS Voyager in 2374. Seven joined the crew under Captain Janeway's mentorship and returned to the Alpha Quadrant with the starship in 2378. The Doctor, Voyager's holographic chief medical officer, was able to remove most of her implants and restore most of her Human appearance, but her long-term assimilation meant that some parts were vital to her survival and could not be removed. She also refused to be called by her name of Annika Hansen as Seven of Nine was the designation she had always known. But she accepted a shortened version, "Seven" at the suggestion of Captain Janeway