Birthday: June 25 Three Sizes: 78-55-79 Considered as a younger clone of Haruka, Ai is described as the unstoppable mini-tank who never loses heart. Her mother, Mai Hidaka, was one of the most well-known idols in Japan, and became pregnant with Ai when she was 15 years old. Her theme color is red, like Haruka. Her character song is 'ALIVE'. (Sources: Wikipedia, idolmaster.jp)