Epiphany, situated in the Corporate Sector of the Outer Rim, was the farthest planet from a red dwarf star within the Salient system, around which it orbited. Zerpen Industries maintained its headquarters on its moon. During the Galactic Empire's reign, the Second Battle of Epiphany occurred, coinciding with the beginning years of Soran Keize's career as a TIE pilot in the Imperial Starfighter Corps; as a participant in this battle, Keize considered it a formative experience, teaching him the importance of safeguarding those he cared about as a means of preserving a greater number of lives.
The novel Catalyst: A Rogue One Novel, penned by James Luceno, marked Epiphany's initial introduction in 2016.