The captain of the Atlantean Royal Guard and a loyal subject of the king, Rodunn turned against his ruler along with the rest of Atlantis after the nation's period under the rule of Gamemnae. He was determined to see Aquaman die, but after a confrontation with him, when Aquaman saved his former captain's life, Rodunn returned to Atlantis determined to tell everyone of their mistake. Formerly a respected military tactician, he is now regarded by others as a madman.