Rudia is a beastman who is a member of the Cult of Shabranigdu. He appears in The Silver Beast. When Lina Inverse first encounters Rudia, he and fellow beastman Vileus are acting as bodyguards for Krotz. When Krotz sees the body of Balgumon, recently killed by Xelloss, he orders Rudia and Vileus to awaken Grouj. The two beastmen refuse, as Grouj has become violent and unpredictable since donning a set of Zanaffar Armor. Krotz then orders the beastmen to fight Lina and her party while he awakens Grouj himself.