Three!

The Parts And Failures Managers, and their Sister Dismantle, are Three Female robots Created by The Professor, with help from Raven, who are each in charge of Managing the parts the Professor has available to him at any given moment and keeping them properly organized, Managing Failed projects of the Professor’s, of any mechanical kind, and Dismantling Failures and Scrap at any time if needed, and salvaging anything possible. The three of them are labeled as one robot because the three of them basically are one robot with three different bodies, and somewhat different personalities to take on their jobs properly. Dismantle has a muscular, larger build, while The Parts and Failures Managers are more slim.