The PI-Series medical assistant droid was a medical droid manufactured by Arakyd Industries, that was mainly used by medical researchers throughout the galaxy. It could not perform medical aid on its own, as it was incapable of making critical decisions, and had to be paired with either a living doctor or a 3Z3 medical droid. Sith Lord Darth Maladi made use of these droids in her laboratory during interrogation sessions, as they would assist her without disturbing her, unlike living assistants.