Locphet

Locphet was an ancient Sith Lord whose likeness was chiseled into the rock walls of the citadel on Exegol by 35 ABY. When Supreme Leader of the First Order and Master of the Knights of Ren Kylo Ren arrived on Exegol to confront Darth Sidious, he traveled through the Sith Citadel and recognized a number of statues of Sith Lords that were etched into the walls from his studies. Of those he recognized were Felkor, Mindran, Sissiri, Naga Sadow, and Locphet. While there, Kylo Ren also heard their unintelligible whispers, along with the familiar voice of Sidious, which he had heard since childhood.

The Acolyte of the Beyond and personal servant of Darth Vader, Vaneé, used the phrase "thank Locphet" to express his relief of being freed from the dungeons of Vader's castle in the aftermath of the Battle of Endor.