- Name: Saito Haruna (齋藤陽菜)
- Nickname: Haatan (はーたん)
- Birthdate: May 24, 2004
- Birthplace: Tochigi, Japan
- Blood Type: A
- Height: 153cm
- Bands / Groups:
- Originally a member of AKB48 Kenkyuusei, a candidate for the 3rd AKB48 Group Draft that was drafted by Team B in the first round, she was promoted to Team B on September 7, 2019.
- Her first choice as a draft member was AKB48.
- She can behave like a partner, but she can be shy.
- Her hobbies include the acoustic guitar.
- Her special talent is memorizing thousands of Pi digits while playing Otama.
- She admires Sashihara Rino and Watanabe Mayu.