Anne Kurusu is a first-year student at Kokureikan High School and the undisputed ace of its climbing team. Her extraordinary competition skills have bestowed upon her the title "Princess of Climbing," a testament to her dominance in the sport.

Publicly, Anne projects a friendly and sportsmanlike image, especially towards her fan club. This persona includes participating in a civil exhibition match against Konomi Kasahara and offering apparent encouragement. Privately, however, her demeanor shifts dramatically. Following the exhibition, Anne confronts Konomi alone, delivering harsh criticism and asserting Hanamiya Girls' High School has no chance at the upcoming Combined Japan High School Cup. This calculated psychological tactic aims to undermine Konomi's confidence, revealing a strategically ruthless nature beneath her gracious exterior.

Despite this tendency to demoralize opponents in private, Anne maintains professionalism in competition. When ultimately defeated by Konomi in the series finale, she accepts the loss gracefully, displaying competitor's composure.

Physically, Anne possesses red hair and distinctive petrol-colored eyes. Her narrative role is that of a skilled rival, challenging the protagonist through both her climbing expertise and psychological tactics.