The whole group calls Kanade “K”. The whole group calls Mafuyu “Yuki”. The whole group calls Ena “Enanan”. The whole group calls Mizuki “Amia”.

Yoisaki Kanade (宵崎奏) is a third-year student taking online classes. She is the leader and composer of the underground music circle 25-ji, Nightcord de., going by the alias K. Asahina Mafuyu (朝比奈まふゆ) is a third-year student at Miyamasuzaka Girls Academy. She is the lyricist of the underground music circle 25-ji, Nightcord de. going by the alias "Yuki". 