Nursel is a supporting character in Legend of Crystania: The Motion Picture, a mage associated with the community overseen by Lord Haven. In English-language materials the same character is also rendered as Nasser or Nasare. Nursel frequently acts as guardian and mentor to the young prince Redon, and he is characterized as calm and thoughtful. His maturity gives him a stabilizing effect on Redon, who is consumed by grief over the murder of his parents and a desire for vengeance. This steadiness matters both while Lord Haven is alive and after Haven's death, when Nursel continues to guide the grieving prince.

As a mage, Nursel casts a variety of spells, and his magical abilities allow him to support those around him during the dangers encountered in Crystania, including the confrontation tied to the god Barbas. His role in the film is that of an adviser and protector rather than a central hero, and his defining relationship is with Redon, whose more impulsive nature is balanced by Nursel's composed judgment. Throughout the events of the story, Nursel remains a reliable and dependable presence rather than a character who undergoes significant personal change.