Mai Hidaka

Mai is the mother of Ai Hidaka. She is 29 years old, which means that she became a mother at the age of 16. She was once a legendary S Rank super idol who won the Ultimate Idol, though was only active for 3 years before retiring. Her image song "ALIVE" was extremely popular, which she later allowed her daughter Ai to use when she became an idol. Late in Ai's story, she comes out of retirement with Manami Okamoto as her manager.

(Source: project-im@s wiki)