Nao Midorikawa is a second-year student at Nanairogaoka Middle School and one of the five main Precure warriors from the Smile Precure! team, transforming into Cure March. In the film Precure All Stars New Stage 2: Kokoro no Tomodachi, she joins her teammates Miyuki Hoshizora, Akane Hino, Yayoi Kise, and Reika Aoki along with many other Precure teams to attend a party at Fairy Academy. The event is disrupted by a mysterious shadow entity that steals the Cures' transformation items, leaving them powerless. Nao is one of the victims whose Smile Pact is taken, but she remains resolute and supports her friends even without her powers. Her background as the eldest of seven siblings has shaped her into a dependable, big-sister type who is athletic and a member of the girls' soccer team, known for her physical prowess and energetic nature. Her strong sense of justice and intolerance for wrongdoing drive her to protect others, and despite a tough exterior, she has a soft spot for cute things and is well-liked by her peers. Her motivation is rooted in safeguarding her family and friends, first demonstrated when she awakened as Cure March by defending her younger siblings. In the film's narrative, Nao's role is a steadfast ally who, alongside the other Smile Cures, supports the DokiDoki! Precure team in recovering the stolen transformation items and defeating Shadow. Key relationships include her close bond with her Smile teammates, particularly Reika Aoki, and interactions with the fairy students Grell and En-En. Nao's character development in the film emphasizes courage and loyalty, as she never wavers in her determination to protect the Fairy Academy and her fellow Cures. Her notable abilities as Cure March involve wind-based attacks such as March Shoot, where she channels fighting spirit into a powerful gust, and she is known for her agility and acrobatic fighting style.