The project is produced by 58-year-old Yasushi Akimoto, best known for his producing works for Onyanko Club, AKB48 and other derived groups.
Following the first four last week, Sony Music and Aniplex have revealed visuals of the last four girls from their Digital Idol project on its official website.
The audition for the eight voice actresses of the characters, who will also perform as a real idol group on stage, will be held till December 17, then its final examination is scheduled on December 24.