Emergency Medical Android
The Emergency Medical Android was a character from The Voyager Encounter simulation in the Museum of Kyrian Heritage. 

In this simulation, the "EMA" developed biogenic weapons during the Vaskan-Kyrian war and tortured prisoners with a neural solvent to gain tactical information for the . 

The EMH backup module was discovered in 3074, and  had to defend himself from accusations of committing war crimes in 2374, although the simple fact of his holographic nature was enough to make the Kyrians question what they had known, ultimately allowing The Doctor to debunk the utterly inaccurate revisionist history the simulation taught. ()

Fictional characters
Holograms
Medical practitioners