A former Borg drone aboard the fictional starship Vortex in the Doctor's holonovel Photons Be Free, modelled on Seven of Nine and the hologram hero's only friend.
Three of Eight is a character in Photons Be Free, the holonovel composed by the Doctor in the Voyager episode Author, Author. Where most of the Vortex's crew are cruel caricatures of Voyager's officers, she is the exception.
Based unmistakably on Seven of Nine, Three of Eight is the one member of the crew who treats the story's emergency medical hologram as a person. She sympathises with his confinement and helps him in his struggle against Captain Jenkins and her officers.
The flattering portrait reflects the Doctor's regard for Seven. It does not spare him the anger of his other shipmates, who recognise themselves in Jenkins, Katanay, Torrey, Marseilles, Kymble and Tulak.