Romani Archaman, nicknamed Dr. Roman, is the head of the medical department and later acting director of Chaldea Security Organization during the Grand Order conflicts of Fate/Grand Order.

Spoiler

Romani's true identity is Solomon, the King of Magic. He was summoned by Marisbury Animusphere and participated in Fuyuki's Holy Grail War, in 2004, emerging victorious. His wish to the Grail was "to become human" and he was thus reborn as a normal person.