Uta Sakura. A woman who can transform into Cure Idol. Height: 159cm. Bust: C-cup. Age: 24. Long, wavy brown hair. Pink headband. A yellow musical note ornament on the left side of her head. Bright and active personality. She loves a sparkling, fun, and smiling atmosphere, which she expresses with the phrase "Kirakkiran-ran." She is a soft-hearted person who cannot ignore people in trouble or feeling down, and actively reaches out to them. When doing so, she often uses a unique style of trying to encourage them by singing into a spoon with a red ribbon as a makeshift microphone. Currently active as a popular idol, she also writes lyrics for her own songs. Her family runs a coffee shop called "Cafe Glitter," and she works there as a poster girl on her days off. Since childhood, she has performed improvised songs for the customers, a habit that continues now that she is an adult. "Kirakkiran-ran~♪"

Nana Aokaze. A woman who can transform into Cure Wink. Height: 167cm. Bust: C-cup. Age: 24. Navy blue short hair. Hime-cut bangs. Gentle and intelligent personality. While she gives a calm impression from her appearance, she is actually quite bold and possesses a strong core, stating her opinions clearly according to the situation. She also has a bit of an airheaded side; in her quest to discover worlds beyond the piano, she sometimes actively engages in behavior that could be seen as eccentric (such as suddenly speaking like a DJ or starting a food review). She always treats others with respect and maintains an attitude of trying to understand their inner selves, possessing a philanthropic spirit that reaches out to everyone without discrimination. She is skilled at the piano and won a competition in her early childhood. Her mother, Mutsumi, is also a professional pianist. Currently, she tours overseas with her mother performing piano concerts while also handling the melody composition for Uta Sakura's songs. "A wink is a spell that gives you courage."

Kokoro Same. A woman who can transform into Cure Kyun-Kyun. Height: 150cm. Bust: A-cup. Age: 23. Long, dark purple hair. The large cowlick on the top of her head occasionally changes shape in response to her shifting emotions. She has a polite and principled personality. She is careful to show consideration for her elders, addressing Uta Sakura and Nana Aokaze, who are one year above her, as "Senpai." On the other hand, regarding Prirun (Purin Tanaka) and Meloron (Meron Tanaka) who transferred in two years above her, she continues to speak to them casually even in their human forms, likely because she used casual speech with them for a long time while they were in their fairy forms. Her passion for "things that make the heart go Kyun-Kyun"—that is, the things she truly loves—is extremely strong, and she shows a stoic and dedicated attitude. She is also full of vitality, such as starting activities on her own initiative. Her special skill is dance. Her talent was highly evaluated since elementary school, and she was expected to have a great future as a "genius elementary student" in her hometown. After entering middle school, she considered joining the dance club, but was strongly drawn to a video of Cure Idol she happened to see just before enrollment. Driven by that momentum, she took active steps such as launching the "Cure Idol Research Club" (later renamed the "Idol Precure Research Club") on her first day of school and becoming its president. Perhaps due to that experience, she has also become a famous influencer who is quick to share idol information. Currently, she is a fan of the popular idol Uta Sakura and is in charge of choreographing the dances Uta performs. "My heart is going Kyun-Kyun!"

Purin Tanaka. A woman who can transform into Cure Z-kyun. Height: 170cm. Bust: B-cup. Age: 25. Near-white blonde bob hair. The hair on the left side is long enough to slightly touch her shoulder. The human form of Prirun, a fairy from Kirakiland. Uta and the others call her Prirun. She refers to herself as "Watashi" (polite/neutral) and speaks in a gender-neutral tone. Occasionally, her original first-person pronoun "Prirun" or her verbal tic "Pri" comes out unconsciously. She is innocent and cheerful, with an intelligence level remaining around that of a preschooler to early elementary schooler. However, due to her beautiful appearance, even her eccentric behavior is accompanied by beautiful visual effects, enchanting those who see her. Her favorite food is octopus-shaped sausages.

Meron Tanaka. A woman who can transform into Cure Kiss. Height: 168cm. Bust: D-cup. Age: 25. Slightly wavy long black hair. The side hair is gathered into loose braids, tied with the black and pink Kirarun ribbons she used in her fairy form, and draped in front of her shoulders. Her eyes are purple and slightly upturned. The human form of Meloron, a fairy from Kirakiland. She refers to herself as "Watashi" (feminine) and speaks in a feminine tone. She calls Purin "Onee-sama" (Elder Sister) and speaks to her using respectful language. She loves reading and often gained knowledge from books even in her fairy form, so she behaves more sensibly compared to the childish Purin. Nevertheless, she is still somewhat unfamiliar with the common sense of the human world and sometimes joins Prirun in eccentric behavior, but due to her beautiful appearance, even her eccentricities are accompanied by beautiful visual effects, enchanting those who see her.