He is Lunair's father and the current Duke of Aeria's Third Quarter. While his appearance might be that of an affectionate man, he is quite cruel and practical when pursuing his goals. He provided Alden with "volunteers" for his experiments on the quintessence, who, in truth, were prisoners of war. His plans increased in violence to the extent that pushed Alden to escape Aeria forever. Duke Rayne treats his subordinates with a misleading mask of kindness, which hides his real motives and true nature. In secret, Duke Rayne is in fact Agatha, the daughter of one of the immortal priestesses from the beginning of the game's history and the game's main antagonist. He shares this secret with his most trusted ally, General Dirk, who is himself Agatha's husband from long ago.