"The eternal elementary school student," Harada Aoi is the youngest first generation member and she is known for her young appearance and childish nature. She took a one year break from activities, starting May 2018, in order to focus on her studies for the last year of highschool and enter a good university. She resumed her activities on July 5, 2019 where she did a surprise come-back at Keyaki Republic. After returning she had noticably matured both in mind and body. Since returning she has been taking the role as the intelligent girl of the group, scoring highest on academic tests and appearing on quiz shows.