Stephen Turner

Grand admiral Stephen Turner was a human Starfleet officer living in the 23rd century.

History
In 2285 he ordered Captain Stiles to assume command of the prototype USS Excelsior and bring Admiral Kirk back to Earth. 

When Kirk later contacted him to inform him of the planned invasion of the Federation by the Terran Empire from the mirror universe he ordered Kirk to report back to Starfleet, which Kirk refused. 

When reporter Lyndra Dean from the Proxima News Service published a story on Kirk's defense of the Federation against the Empire he had her brought to his office to find out where her information came from. However, she refused.