Assembler, a droid, became a member of the Directive 7 group led by Mentor during the Galactic War period. After selecting a new designation, Assembler was one of the droids who assembled on the moon Zadd under Mentor's command. Uniquely, Assembler was among the few droids that escaped assimilation into Mentor's mind. However, Assembler met its end, being destroyed in an attempt to safeguard Mentor's core from approaching enemies.
Within the Flashpoint "Directive 7" of the video game Star Wars: The Old Republic, Assembler is featured as a uniquely identified enemy.