Patty Gatsby, originally Sanae Nakazawa, first encountered Tsubasa Ozora at Nankatsu Elementary School. Initially embracing her tomboy persona, she spearheaded the school football team's cheerleading squad, earning the nickname "Anego" (big sister) through her bossy but protective demeanor. Her early reluctance toward Tsubasa dissolved upon seeing his football talent, sparking a lasting romantic interest. She continued her steadfast support as team manager in junior high, where rival Kumi Sugimoto vied for Tsubasa's affection. Following Tsubasa's rejection of Kumi and confrontation with Sanae's aggressive admirer, Koshi Kanda, the pair formally confessed their mutual feelings.

Their bond endured a long-distance phase when Tsubasa pursued football in Brazil. Sanae worked at a family restaurant, saving to visit him for a brief São Paulo reunion. After Tsubasa returned to Japan for the World Youth tournament, he proposed with an engagement ring post-competition. They married soon after in a Western-style ceremony attended by friends.

Accompanying Tsubasa to Barcelona for his professional career, she settled into a supportive spouse role. During this time, she recognized signs of psychological pressure affecting his performance. Later, she revealed her pregnancy with twins, amidst Tsubasa's participation in the Madrid Olympics. Opting to return to Japan for childbirth near family, she expressed determination for a safe delivery while hoping Tsubasa could attend.

Her personality evolved from a mood-swinging, boyish cheerleader toward a more feminine and mature individual, though childhood rivalries sometimes triggered jealousy. She maintained close friendships, notably with Yukari Nishimoto and Manabu Takasugi, acting as a confidante for team secrets. Throughout every stage, her dedication remained unwavering: supporting Tsubasa's dreams while pursuing her own alongside him.