The Tal Prai'ex is an elite organization of warriors present within the Romulan Star Empire and are also known as the Praetorian Guard. They were known to have been the personal forces of the Emperor of the Romulan Star Empire.
The Tal Prai'ex follows the regular chain of command within the Romulan Imperial Star Navy, however, their orders can be countermanded by any ranking member of the Imperial Household. All commanders of the Tal Prai'ex are expected to provide regular intelligence to the Praetor of the Romulan Star Empire.
The Tal Prai'ex serve as the space branch of the Praetorians who serve as elite marines. Just as the Praetorians serve as the best of body guards, the Tal Prai'ex serves as elite escorts to important Romulan starships.
Acceptance within the Tal Prai'ex was one of the highest honors available to a member of the Star Empire. Its commanding officers were known for their fairness, honor, ability and their respect for the common people. (TOS video game: Starfleet Command)