J9-04

J9-04, also known as Harold, was a synth that escaped from the Institute.

Background
B-263 was assigned with tracking down and reclaiming J9-04, who had received facial reconstruction surgery to disguise his appearance and hid in plain sight as a supply vendor in Diamond City. B-263 retrieved his resident history file from a confidant in the city, and he confronted J9-04.

J9-04 attempted to expose B-263 for being a synth himself, but the guards did not believe him and Mayor McDonough backed up the agent. B-263 told everyone that J9-04 had been stealing goods, and they let him do whatever he wanted with the escapee. J9-04 was eventually reclaimed and returned to the Institute.

Appearances
J9-04 is mentioned