Mio Shirai
In February 2012, Ice Ribbon formed a partnership with Japanese pop group hy4_4yh (Hyper Yo-yo). The partnership led to the group making musical appearances at Ice Ribbon events, performing Maki Narumiya's new entrance theme and, on March 7, the two promoting the first "Hyper Ribbon" event, which featured both matches and musical performances. On December 12, 2012, Neoplus officially announced the creation of Corazon Joshi Puroresu, Ice Ribbon's sister promotion, which has a more theatrical take on professional wrestling. Following Sayaka Obihiro's December 2012 departure from Ice Ribbon, the promotion put "19 O'Clock Girls ProWrestling" on hiatus as it considered the future of the program. On January 4, 2014, Ice Ribbon was dealt another blow, when Hikaru Shida announced she was also leaving the promotion the following March. On January 22, longtime freelancer Mio Shirai signed a contract with Ice Ribbon. Following her September 2015 retirement, she became a referee and trainer for Ice Ribbon. On January 3, 2016, Ice Ribbon original Aoi Kizuki announced her departure from the promotion.