Tomomi Kasai

 is a Japanese singer, actress and a former member of the idol group AKB48, belonging to Team A. She had a recurring role on "Kamen Rider W" as Elizabeth, alongside group member Tomomi Itano. Together, they make up the sub-unit Queen & Elizabeth.
On November 10, 2012, it was announced she would be making her solo debut. On November 25, Kasai performed her solo song for the first time, the title announced as . It was released on December 26. On December 17, Kasai announced that she would leave the group. Her farewell ceremony was on May 3, 2013.