- Houjou Hibiki - civilian name of Cure Melody
- Minamino Kanade - civilian name of Cure Rhythm
- Cure Muse - masked cure
- Mephisto - King of Minor Land
- Siren/Kurokawa Ellen - Mephisto's cat assistant. Transforms into Cure Beat.
- Bassdrum, Baritone, Falsetto - Trio the Minor members
- Negatone - monsters of the week
- Minamino Souta - Kanade's younger brother
- Shirabe Ako - friend of Souta's; revealed to be Cure Muse and sports a new outfit
- Nishijima Waon - classmate and sport friend of Hibiki
- Higashiyama Seika - senior and club president of Kanade
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