Washio Reina (鷲尾伶菜) is a Japanese singer and dancer. She debuted in 2011 as a singer-performer of the group FLOWER of LDH agency. Later that year she re-debuted as a member of the super-group E-girls. On October 2, 2020 she debuted as a solo artist under the stage name Rei (伶). As of July 2023, she has again been going by her full name.