Yoisaki Kanade is a home-schooled student. She's the composer of the underground music circle 25-ji, Night Code de. going by the alias "K".Kanade is traumatized by a time when her own music caused despair to her father. Ever since that incident, she has been writing music to make others happy, and started the music circle 25-ji, Night Code de.Kanade appears to be very accepting and sympathetic towards her fellow circle members. She'd like to make other people happy with her music.