Mayu Mitsui (三井 麻由, Mitsui Mayu) is a Japanese gravure idol and actress born on October 8, 1989 in Chiba Prefecture, Japan. She starred in the film Saikin, Imouto no Yousu ga Chotto Okashiin da ga. She currently goes by the stage name of Mayu (繭) and also worked under the name of Mayu Fujisaki (藤咲 まゆ, Fujisaki Mayu).