|Birthdate||February 23, 2004|
|Current Age||15 Years Old|
|Idol Career Info|
|Debuted||September 7, 2019 / Sakamichi Kenshusei|
Morimoto Mari is a member of Sakamichi Kenshusei
- Her audition SHOWROOM number was #4. Her nickname during the auditions was Roppu-chan (ロップちゃん).
- Her favorite Nogizaka46 members are Saito Asuka and Iwamoto Renka. Her favorite Keyakizaka46 member is Watanabe Rika. Her favorite Hinatazaka46 members are Kanemura Miku and Hamagishi Hiyori.