Ai Hoshino was an idol for B-Komachi, and the mother of Aquamarine (Aqua for short) and Ruby. Originally hailing from an abusive and solemn past, Ai Hoshino was a bumpkin with no professionalism who eventually managed to become an idol due to some connections. Due to that, Ai Hoshino lacked any memory of loving or ever being loved herself, using lies as the best way to express her love. It was only moments before her death that Ai Hoshino realized true love; the love she has for her baby twins.