Answer
Brine King, portrayed by John Rhys-Davies, is the ruler of the underwater kingdom of Xebel and father to Mera. He is a powerful and ruthless warrior who seeks to conquer the surface world and unite the seven underwater kingdoms under his rule. While Aquaman seeks peace between the surface world and the underwater realms, Brine King is determined to fight for dominance, causing tension and conflict in the film's narrative.