2012–2014 Kawaei auditioned for AKB48 and was selected to join the 11th generation as a
kenkyūsei (trainee) in July 2010. In March 2012, she was promoted to Team 4, and was transferred to Team A in August. Soon after the TV series
Shiritsu Bakaleya Kōkō ended on June 30, it was announced that Kawaei would participate in its film adaptation. It would star several members from the groups
Johnny's Jr. and AKB48. Kawaei was a member of the AKB48 subunit Anrire with
Anna Iriyama and
Rena Katō. They appeared in
Rino Sashihara's 2012 single "
Ikujinashi Masquerade", which charted at number one in the Japanese
Oricon weekly singles chart. In 2013, during a broadcast of a special episode of the comedy show
Mecha-Mecha Iketeru!, it was announced that Kawaei would perform as center in a song of the special unit BKA48 that will be included on AKB48's single "
Sayonara Crawl" to be released in May. At the 2013 AKB48 general election, she placed 25th with 26,764 votes,
2014–present At AKB48's 2014 general election she placed 16th with 39,120 votes and thus gained a place in the promotional line-up for the next single "
Kokoro no Placard". On March 26, 2015, Kawaei announced that she would leave AKB48 and transition to acting, citing her inability to participate in handshake events after the handsaw assault as the reason. She made her debut voice role in the
anime film , voicing Minifalulu, the younger sister of Falulu. == Personal life ==