Three of Three was a freed Borg drone, like her siblings One of Three and Two of Three, and served on the USS Voyeur. (VOY: "Author, Author", RIS Bouteina) In "Author, Author", the USS Voyeur, as well as its crew, was imaginary, but was real in RIS Bouteina. She served as the second officer of the Voyeur. (RIS Bouteina: "Relief and Refuge")