Rena Matsui (松井 玲奈, Matsui Rena, born July 27, 1991) is a Japanese actress, singer, novelist, YouTuber and former member of the Japanese idol girl groups SKE48 and Nogizaka46. As a member of the former, she also participated in the main lineup of AKB48's singles. As an actress, she has played roles in numerous films and television series, including Kamen Rider Build the Movie: Be the One and the ninety-ninth NHK asadora Manpuku.