Silas was a male Human officer in Starfleet in the 24th century.
Biography
As of the 2350s decade, Silas held the rank of captain, and was assigned to Starfleet Academy, where he served as a proctor during cadet training missions. In that capacity, he oversaw an exercise where Cadet William T. Riker was to retrieve the damaged starship USS Caspian from an asteroid field. (TNG comic: "Thin Ice")