Dominique Delacroix was an actress.
She was the star of Executive Desires, which was broadcast from Reef Station One. Walter J. Matheson helped make an Auton replica of her. It was deliberately created to be extremely advanced, as it was intended to be the host for the Nestene Consciousness, which was under attack on its homeworld Polymos by the Time Lords. However, the duplicate of Marcus Brooks that was made was advanced as well, retaining the original's personality and helping the Doctor trap the Consciousness in the Delacroix replica. The real Brooks and Delacroix were later freed. (PROSE: Synthespians™)