How many movies have Mai Nakahara and Rina Hidaka acted in together?

They have worked on 3 movies together! Their first movie together was 声優DVD企画 宝探し～至高のペルソナ～in マザー牧場 (2012) while their highest rated movie together was Arpeggio of Blue Steel -Ars Nova Cadenza- (2015). They have not worked together since Arpeggio of Blue Steel -Ars Nova Cadenza- (2015). They are most known for their science fiction films together.