Nonsense101 said: Let's see there's Reimu, Cirno, Meiling, Suwako, Yukari, Youmu, Sakuya and Utsuho of course. There's anothe one but I can't make it out.
It's possibly Marisa. All the characters are from Unthinkable Natural Law, I think.
Character henshins in order (using the real belt for a reference): Reimu = Kuuga Utsuho = Agito Sakuya = Ryuki Youmu = Faiz Yukari = Blade Suwako = Hibiki Marisa = Kabuto Meiling = Den-O Cirno = Kiva