|Birthdate||May 5, 1998|
|Current Age||25 Years Old|
|Idol Career Info|
|Former Team||2nd Generation|
|Debuted||December 5, 2018 / Keyakizaka46 2nd Generation|
Matsudaira Riko was a member of Sakurazaka46's 2nd Generation. She is currently affiliated with Image Entertainment.
- Her audition SHOWROOM number was #58.
- Audition song: Ito (Nakajima Miyuki)
- She coincidentally performed the same audition song as 1st Generation member Watanabe Rika.
- Hobbies: Listening to rock
- Favorite Foods: Gyoza
- Favorite Colors: Pink, white and black
- Skills: Basketball and talking with stuffed toys
- Keyakizaka46 Oshimen: Watanabe Rika
- If she were to compare herself to an animal, it would be a rabbit because she cries quickly and easily tremble (with fear).
- She is a self-proclaimed "Do-in-kya (ド陰キャ)" meaning she has a "uncool" and gloomy character.
- When she was a student she never stayed long in any clubs or put in any effort, so she applied to become an idol in order to change herself.
- On Keyakitte, Kakenai?, she scored the lowest on the Academic Test in the whole group.
- She used to update her blog and send mail on Keyakizaka46's Mobile Mail App daily.
- Her main goal as an idol was to become a model.
- Sakamichi Joint Auditions finalist → Keyakizaka46 2nd Generation → Sakurazaka46 2nd Generation → Graduation
- She passed the Sakamichi Joint Auditions on August 20, 2018
- Joined Keyakizaka46 2nd Generation on December 5, 2018
- Transferred to Sakurazaka46 2nd Generation on October 14, 2020
- Graduated from Sakurazaka46 2nd Generation on March 14, 2021 (Announcement: January 8, 2021)
- Sajin (Eien Yori Nagai Isshun 〜Ano Koro, Tashika ni Sonzaishita Watashitachi〜)
- Concentration (Eien Yori Nagai Isshun 〜Ano Koro, Tashika ni Sonzaishita Watashitachi〜)