Adelbert is the first important character that Yuri meets in Shin Makoku. He is Julia's former fiancée and abandons Shin Makoku, as he feels that the way of the Mazoku is wrong. He believes that the Mazoku are simply toys of the Original King. Though in the beginning he is considered an enemy, as the series progresses he begins to protect Yuri, though he still wants Yuri to show him what he is worth as the new king.