Ai Kago
As a fan of idol singers, Tanemura created the series out of desire to write lyrics. Her previous series, "Time Stranger Kyoko", was cut short due to the main protagonist, Kyoko, having a strong personality, which failed to appeal to her editors and reader demographic. As a result of this, Tanemura decided to give Mitsuki a more subdued personality and later had the idea of making her sickly to explain her shy behavior. Mitsuki's corkscrew hairstyle was inspired by Morning Musume member Ai Kago, while her character was modeled on one of Tanemura's assistants, Airi Teito.