For the mirror universe counterpart, please see M. Moreira (mirror).
M. Moreira was a Starfleet officer in the 23rd century.
Moreira a member of the Tactical Ops team listed on the dedication plaques of the USS Discovery and the USS Enterprise. (DIS: "Context Is for Kings", Discovery dedication plaque; DIS: "Such Sweet Sorrow")
This character was only mentioned in writing.
This officer was named after property master Mario Moreira.