In Persian lore Demrush was a deev fiercer than Arshenk; he lived in a dark cave filled with all of the treasure he had plundered from India and Persia. Demrush had kidnapped and held captive Peri Merjận, chaining her to the center of his mountain dwelling. Her two brothers, Dậl Peri and Milận Shậh Peri, tried to save her but failed, ultimately she was rescued when the mortal hero, Tahmuras, slew Demrush.