Rena Matsui is a member of the Japanese idol group SKE48. She is in Team S. She takes part in not only SKE48 but AKB48 selection members for CD. Rena Matsui participated in the first SKE48 audition in July 2008, which she passed along with 22 other participants; Kinto. The group made their debut in October 5, 2008. She was chosen as the selection member of AKB48 for CD by "10nen Zakura" for the first time.