Y4-E was a silver-colored protocol droid owned by the Metatheran Cartel.


Y4-E served in the Personnel Office of the Cartel's jungle base on Cularin alongside 3B-IR and LS-121 during the time of Velin Wir's plot to take over the economy of the planet Cularin in 31 BBY. At this point, Y4-E had been with the Cartel for some time, and was well versed in the organization and assignments of Cartel personnel. When the Cularin resistance successfully attacked the jungle base, they captured the base's guards and other personnel and escorted them out before the base was destroyed by a turbolaser bombardment from above.