Akiyama Mizuki is a second year student at Kamiyama High School. They are the animator of the underground music circle 25-ji, Nightcord de., going by the alias "Amia".Mizuki is an animator and video maker who uploads music videos online. They were captivated by Kanade's music upon listening to it, and made an MV for the song. Kanade invited Mizuki to 25-ji, Nightcord de. after seeing this video.Since Junior High, Mizuki was treated as an outcast for dressing and acting oddly.