A bright girl who loves sports. She hates injustice and has a sense of justice twice as strong as anyone else! She comes from a musical family; her father is a music teacher and her mother is a world-class violinist. A second-year middle school student who hates losing more than anything. She loves sweets, and her favorite is the cake from her childhood friend Kanade's house. She is cheerful but a bit clumsy. She often gets into arguments with Kanade. Catchphrase: If I don't settle this here, I'm not a woman! Transforms into Cure Melody. Transformation phrase: Strumming the wild tune! Cure Melody! Apparently, her academic performance is quite poor.

A second-year middle school girl who is good at studying and making sweets. She looks quiet, but she has a stubborn side and won't back down on things she doesn't agree with. Her dream for the future is to become a pâtissier and take over her family's cupcake shop. She deeply respects her father, who is a cake artisan. She loves cats and is an absolute "paw pad fanatic." She is Hibiki's childhood friend. She is helpful and caring. She often gets into arguments with Hibiki. She has a younger brother named Sota Minamino. Transforms into Cure Rhythm. Transformation phrase: Strumming the graceful tune! Cure Rhythm!

Hummy's best friend and a former songstress of Major Land. Her heart was once tainted by evil, making her an enemy of the PreCure, but she was reborn as a PreCure through Hummy's desire to protect her. She is a hard worker who cares for her friends. She studies using books borrowed from Otokichi-san and tries her hand at various things. She has a curious personality and wants to know everything. She is terrified of ghosts. She even gets scared of creatures she sees for the first time. Transforms into Cure Beat. Transformation phrase: Strumming the soul's tune! Cure Beat!!

The princess of Major Land. She acted as the Masked PreCure to save her father, Mephisto, whose heart had been tainted by evil. After her father regained his kind heart, she removed her mask and fought alongside Melody, Rhythm, and Beat. She is younger than the other three but is the most reliable one. A third-grade elementary student. She is sharp-tongued, a bit cheeky, and mature for her age. Transforms into Cure Muse. Transformation phrase: Strumming the goddess's tune! Cure Muse!

A fairy from Major Land who sings the "Melody of Happiness." She came to find the PreCure to fight alongside her and collect the notes of the "Legendary Score" that were scattered across the human world. She is positive and easygoing. She ends her sentences with "nya."

Hibiki's father, who works as a music teacher at Private Aria Academy Junior High. He serves as the conductor for the Music Prince Troupe and instructs the members. He truly loves and enjoys music.

Hibiki's mother and a violinist who travels the world on performance tours. She frequently contacts Hibiki and her husband, Dan, via computer. Her personality is somewhat forceful.

Kanade's father, who works at the cupcake shop "Lucky Spoon." He is a devoted husband who boasts that he makes cupcakes just to see his wife Misora's smile.

Kanade's mother, who works at the cupcake shop "Lucky Spoon." She loves the cupcakes her husband makes.

The King of Major Land. His heart was tainted by evil due to Noise, and he attempted to complete the Melody of Sorrow, but he regained his original kind heart thanks to the PreCure. He has a cheerful personality and dotes on his daughter, Ako. Now that he has regained his heart, he is an ally.