Eph, a Human of male gender, existed in the final period of the Galactic Republic.
Eph held membership within the Believers, a Sith cult with its central operations in the Cularin system. In the time of the Clone Wars, Eph went with Crymsin Ost, Disch'l of the Believers, and the assassin Melo Centris on a task to the planet known as Caarimon. They made their way onto a space station in orbit around the planet, with the intention of launching a virus to the surface using escape pods. Nevertheless, the Heroes of Cularin met them on the station, overcoming Eph and his allies and stopping their virus release.