T'Pera was a holographic Vulcan female created by The Doctor to serve as mate for Vorik during his pon farr. At first, Vorik was skeptical about this, but then apparently changed his mind and mated with her, apparently curing his pon farr. However, in reality Vorik disguised himself as healed so he could execute his plan to mate with his real desire, B'Elanna Torres. (VOY: "Blood Fever")