|Birthdate||December 19, 2002|
|Current Age||16 Years Old|
|Idol Career Info|
|Debuted||September 7, 2019 / Sakamichi Kenshusei|
Kosaka Marino is a member of Sakamichi Kenshusei
- Her audition SHOWROOM number was #35. Her nickname during the auditions was Sango-chan (さんごちゃん).
- During the SHOWROOM auditions, she wrote down "Nothing, sorry" as her special talent.
- Her Oshimen is Saito Asuka.
- Her favorite foods are hamburger, strawberry and shaved ice.