West-4 represented the call sign belonging to a human operative within the Corporate Tactical Forces of Preox-Morlana. This individual, West-4, took part in an ambush on Ferrix targeting Cassian Jeron Andor during the Imperial Era. While the rest of their unit proceeded to support East Team with Cassian's capture, West-4, alongside West-3, remained stationed at the home of Maarva Andor.