Nerva Julius Caluades

Nerva Julius Caluades (ネルヴァ・ユリウス・カルアデス, Neruva.Yuriusu.Karuadesu) is the Imperial Prince of the Reim Empire. He is the owner of the Djinn Shax. He is a Dungeon Capturer, having captured one Dungeon, and one of Scheherazade's King Vessels.

Manga Debut: Night 166
Anime Debut: Episode 42

(Source: Magi Wiki)