King Regis Lucis Caelum CXIII is a character from Final Fantasy XV and the father of Noctis Lucis Caelum. He is the 113th king of the royal family of Lucis, the last kingdom to control a crystal; Niflheim’s army seeks to conquer Lucis, take its crystal, and end the reign of the Caelum family.
In the trailer revealed at the “Square Enix 1st Production Department Premiere” in January 2011, Regis is shown sitting on his throne, pondering and talking to himself. He is also seen facing off against a mysterious white-robed man. Regis wields a falchion with an engine attached to its hilt and has the power to manipulate weapons; they all point menacingly towards the robed man opposing him. In the E3 2013 trailer, Regis is surrounded by Niflheim forces.
Final Fantasy XV Characters Wiki 