Nova Bluenote is a main character and third-year student at St. Muse Academy, an institution training individuals to balance and control the "spirits of sound" to ensure harmony between humans and sound. He belongs to a group of five academically struggling students assigned a special mission related to the academy's purpose. As a core member of this third-year group, Nova undertakes the activities and challenges of their special mission. His design features animal ears, a tail, and rosy cheeks.