"Berza" was the identity adopted by Starfleet Lieutenant Patrick O'Shea while working undercover in the Romulan Star Empire in the 2290s. Berza served as third or fourth in command of the Romulan vessel ChR Talon, and then "assisted" Tal Shiar High Examiner Rokan in his questioning of Captain John Harriman. (ST short story: "Shakedown")