Lieutenant Bobby was a male Human Starfleet officer in the 23rd century. He served aboard the USS Enterprise under Captain James T. Kirk, during a historic five-year mission that starship undertook. From 2266 to 2267, he often alternated between the command and operations divisions while he served as a engineer, security guard, and transporter chief.
While on his way to his duty assignment, he and a sciences technician were encountered on level two, corridor three by a rapier-wielding Lieutenant Sulu, who was under the influence of the Psi 2000 virus declared "Richelieu, beware!" Sulu eventually called the two "cowards" after they ran back the way they came. Their incident was later reported to the bridge. Thereafter, Bobby was among the guards who entered the engineering control room to apprehend the polywater intoxicated Kevin Riley, who had taken control of the ship through that station. (TOS: "The Naked Time")
During the Romulan Neutral Zone Incursion, when the Enterprise was attempting to outrun a plasma torpedo, Kirk signed off on his clipboard and handed it to Bobby, instructing him to "feed this into the space recorder and jettison immediately." (TOS: "Balance of Terror")
He later served as member of the ship's security. When the Enterprise was thrown back in time to 1969, Bobby was attacked by United States Air Force Captain John Christopher, who stole his phaser. (TOS: "Tomorrow is Yesterday") He later joined the landing party during its beam down to Deneva. (TOS: "Operation -- Annihilate!")
James Blish's novelization of "Operation -- Annihilate!" referred to this character as Abrams, which corresponds with the name given in the script. The novel A Choice of Catastrophes calls him Robert Abrams.
The novel Provenance of Shadows refers to him as Crewman Tiroli.