Demetrius (デミトリアス,Demitoriasu?) is a major character in Tales of the Rays. He is the King of Sellund. Weak and sickly since birth, he has appointed Prime Minister Gefion to perform most of his duties. He is the once who assists Ickx Neve and Mileena Weiss when she is away on business. While not the most gifted communicator, he possesses a wealth of knowledge regarding mirror weapon mirrage technology and equipment.