Ada is a heavily modified assaultron robot, with sentry bot and protectron parts, and was created by Jackson. She traveled with his caravan, which specialized in mechanical repairs and trade, throughout the Commonwealth. Jackson's caravan attracted the attention of the Mechanist, and after three attacks, every member of the caravan except Ada had perished. Ada is first encountered during the quest Mechanical Menace during which the Sole Survivor must help Ada eliminate the robots that attacked her caravan.