A resident of the "Dark Dimension" of the Marvel Comics multiverse, Umar is a Faltine, a higher-dimensional energy being trapped in human form. She is the sister of Dormammu, a major adversary to Earth's Sorcerer Supreme, Doctor Strange, and the mother to Strange's love interest, Clea, through which she has served as recurring enemy of Strange herself. Her powers have been depicted as exceeding those of Earth's sorcerers, including Strange, making defeating her very difficult. Umar and Dormammu have been historically depicted in a constant battle over the throne of the Dark Dimension, a mystical realm to which they had initially been banished by their people, over which Dormammu typically rules. whereas Umar is usually depicted in a form resembling a human woman.