Terrab was a male Gran researcher residing in the village of Voam on the planet Nal Hutta during the Cold War. He was studying the local Evocii's apparent resistance to the planet's pollution. An Imperial-aligned individual, fulfilling a bounty for Suudaa Nem'ro, acquired a datacore from one of Voontara Fa'athra's mining droids and brought it to Terrab for study.