Emperor
Emperor (from the Roman title Imperator, meaning one with authority to command an army) is the title of an autocratic ruler of a large nation, typically one that has conquered several other nations and declared itself an empire.
Emperors in Science Fiction
- Emperor (Star Wars): Ruler of the Galactic Empire
- Emperor (Warhammer 40,000): Immortal, god-like ruler of the Imperium of Man
- Charles zi Britannia: Ruler of the Holy Britannian Empire from Code Geass.