R. Fletcher was a Starfleet officer in the 23rd century.
In 2385, they were a captain assigned to Starfleet Academy's Starfleet Training Command. Their office, located on the second level of a building, was in room #211. Their rank, name, and office were listed on a directory placard. (Star Trek II: The Wrath of Khan, set artwork)
This character was only mentioned in writing.
This officer was named after Robert Fletcher. The placard was sold on It's A Wrap! sale and auction for US$31.99. [1]