Aaron was a Starfleet vice admiral who, in 2364, was taken over by alien neural parasites that infiltrated Starfleet Command. (TNG: "Conspiracy")
- Rear Admiral Aaron was played by Ray Reinhardt, who later portrayed Tolen Ren in VOY: "Ex Post Facto." His rank insignia was an admiral braid and two pips, indicating a vice admiral in the TNG season one rank insignia.