Derian was an elderly Drenai statesman, aide and friend to Orien, Battle King of the Drenai. He aided Orien in hiding away the Armour of Bronze, although was personally against the idea. He also attempted to convince Orien not to abdicate, but could not alter the plans of his king. The two parted as comrades.
Derian is described simply as elderly, slender and wearing a blue robe. Blue robes are garments commonly worn by Source priests, although Derian is not identified as such; rather he is termed a statesman. Whatever the case, it is implicit is his age and relationship with Orien that he was an important member of the group of individuals who originally formed the Drenai nation.