IM4-099, also known as "Face", functioned as a Mark IV sentry droid within the ranks of the Mos Eisley Militia. In service to the Galactic Empire, IM4-099 furnished the Empire with intelligence concerning illicit operations. The droid approached its responsibilities with considerable dedication.
IM4-099 frequently mocked the ASP-series droid ASP-704; on one occasion, after perceiving unlawful transmissions emanating from comm repeaters being installed by ASP-704, the aggravated droid retaliated by knocking IM4-099 out of the sky. However, IM4-099 recuperated from this assault and was subsequently observed cheerfully accompanying sandtroopers.
The 1997 release of A New Hope saw the inclusion of IM4-099, created entirely as a computer-generated 3D model.