Voice: Green is a baby of the group, and they need a cutesy girly voice, such as Nico. They will be a pure attribute though, so they need innocence in their voice. A babyish voice would be well suited for this role. A soprano is a must. They will be hitting the highest notes for this group, so don't strain your voice. Itsuki Inubozaki is a girl who loves to sing, so it's okay to sound cheerful when you sing and not shy (no girl who auditions for this should sing shyly on purpose), just try to sound babyish and cutesy.