(Played by Salli Alise Richardson)

Alluring humanoid female whom Benjamin Sisko became romantically involved with in 2370 on DS9. It was discovered that Fenna was actually an unintentionally projected being of pure energy, a doppelganger for Nidell, the Halanan wife of Prof. Gideon Seyetik and a psychoprojective telepath. Fenna voluntarily "died" so that Nidell could live, especially after her husband sacrificed himself to his project—and so as to set his unhappy wife "free."