M.C. Minor was a Starfleet flag officer in the 23rd century.

In 2285, they were a rear admiral at Starfleet Academy's Starfleet Training Command. Their position at the Academy was that of Commandante Cadets. Their office, located on the second level of a building, was in room #203. Their rank, name, position, 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 illustrator Michael Minor. The placard was sold on It's A Wrap! sale and auction. [1]