Iona Hikawa attends Blue Sky Kingdom as a student, initially projecting a cold, aloof demeanor while excelling in combat. Her emotional isolation stems from a past betrayal by a former friend, which cemented her belief that relying on others brings only pain. This trauma fuels her solitary dedication to her Pretty Cure duties.

She debuts as Cure Fortune during a critical battle where existing Cures face defeat, fighting independently with formidable strength, agility, and mastery of her Fortune Violin. Her initial interactions with the team, particularly Megumi Hoshizora/Cure Happy, radiate distrust as she dismisses their teamwork philosophy.

Overcoming profound trust issues defines her growth. Forced alliances and witnessing the genuine bonds among other Cures begin challenging her solitary stance. A pivotal confrontation with Phantom—an enemy exploiting her past trauma and fear of betrayal—pushes her toward despair and near-defeat. The unwavering trust and support from Megumi and the team during this crisis fracture her emotional barriers.

Gradually, she embraces teamwork and friendship, forging a deep bond with Megumi that evolves their rivalry into mutual respect and trust. Integrating her combat prowess into group strategies, she becomes a reliable team member. Though maintaining her serious, disciplined nature, she grows more open, protective of friends, and willing to express care.

Her transformation phrase, "Precure! Open My Heart!", reflects her journey from isolation to connection. She wields the Fortune Violin to fire musical-note energy blasts ("Fortune Wave") and create barriers. Her signature attack, "Precure Fortune Blizzard", unleashes freezing energy beams. She later gains combination-attack capabilities with other Cures.

Her Cure design features dark blue, white, and gold with musical-note motifs and a violin bow. In civilian life, she has long, straight black hair and reserved fashion.

Regarding "Eiga Precure All Stars: Minna de Utau Kiseki no Mahō!", no specific information exists detailing unique character development, background revelations, or distinct actions for Iona Hikawa/Cure Fortune within that film narrative beyond her participation alongside other Cures. Information about her role or contributions specific to that movie's plot is unavailable.