Regis Lucis Caelum

Regis Lucis Caelum is a major character in the Final Fantasy XV Universe, his most major appearance being in the feature film Kingsglaive: Final Fantasy XV. He is the main protagonist of A King's Tale: Final Fantasy XV, and also appears in Final Fantasy XV. He appears as a boss in Final Fantasy XV: Episode Ardyn.

As the king of Lucis, he is referred to as King Regis or Regis Lucis Caelum CXIII. He uses the Ring of the Lucii to channel the power of Insomnia's Crystal to maintain the Wall around the metropolis, but this gradually drains his life-force. Regis thus feels ambivalent that his son, Noctis Lucis Caelum, will have the same fate befall him.