During the Galactic Civil War, a male Chiss who was a member of the Lok Revenants was called Mako Ghast, and he resided on the planet Lok.
Following the Battle of Yavin, Mako Ghast served within the Lok Revenants as a lieutenant to their leader, Nym. His workplace was Nym's palace, situated in the city known as Nym's Stronghold.
In the year 1 ABY, Ghast played a role in the majority of significant operations carried out by the Lok Revenants. In that year, the Lok Revenants launched an attack on the hideout of their adversaries, the Sulfur Lake Pirates, with the objective of recovering the precious memory module from an Imperial droid. Mako Ghast assigned a spacer who was involved in this mission the task of eliminating a hazardous creature, referred to as the Bridge Troll, which was guarding the pirate hideout. During the same year, the Lok Revenants conducted a raid on an Imperial mine, where an unidentifiable toxic gas had been emitted, causing the miners to descend into madness and hostility. Ghast tasked the spacer with the elimination of two miners, namely Raynar Cath and Wes Riggers, who were well-known opponents of Nym. Subsequently, the Revenants mounted an assault on an Imperial research facility located on Lok, intending to pilfer experimental weaponry that had been both developed and manufactured there. On this occasion, Mako Ghast instructed the spacer to assassinate four of the mercenaries who were defending the facility, identified as Kendo Ryzak, Platt Pareja, Goll Bardok, and Jeran Tarven, due to their interference in Nym's affairs.
Mako Ghast appeared as a non-player character within the 2003 video game Star Wars Galaxies, a massively multiplayer online roleplaying game that was created by Sony Online Entertainment and distributed by LucasArts, before its servers were shut down on December 15, 2011. Mako Ghast was integrated into the game through the updated "Nym's Theme Park," which was launched alongside "Game Update 16," on March 23, 2010.