- Name: Shimakura Rika (島倉りか)
- Birthdate: August 20, 2000
- Birthplace: Tokyo, Japan
- Blood Type: A
- Height: 153.7cm
- Specialties: Eating watermleon quickly, catching insects
- Hobbies: Watching Hello! Project videos, karaoke, watching movies, picking fruit
- Looks Up To: Morito Chisaki, Inoue Rei
- Hello! Project groups:
Shimakura Rika became a finalist in the "Morning Musume '16 Shinseiki Audition", but failed to pass. It was later announced through an official website update on March 6, 2017 that Shimakura had joined Hello Pro Kenshuusei, alongside Hibi Marina, Eguchi Saya, Doi Rena, Okamura Minami, Matsunaga Riai, Yamada Ichigo, and Nakayama Natsume. She made her first live appearance and was formally introduced at the ""Hello Pro Kenshuusei Happyoukai 2017 3gatsu ~Marching!~" event on March 11, 2017.
Shimakura was awarded Best Performance with 324 audience votes on May 6, 2018 at the "Hello! Project Kenshuusei Happyoukai 2018 ~Haru no Koukai Jitsuryoku Shindan Test~" event, for her performance of "Fiesta! Fiesta!" by Juice=Juice. On June 9, 2018 during the "Hello! Project Kenshuusei Happyoukai 2018 6gatsu ~Niji~" event in Tokyo, it was announced that Shimakura would join the upcoming group featuring previously announced leader Ichioka Reina, along with Nishida Shiori and Eguchi Saya. The group would be unveiled at a later date in 2018.
- TV Programs
-  Hello Pro no Oshigoto Challenge! (ハロプロのお仕事チャレンジ!)
-  Hello Pro Kouhaku Taiko THE☆BATTLE 2019 (ハロプロ紅白対抗 ザ☆バトル2019)
-  Hello Pro no Oshigoto Challenge! 2 (ハロプロのお仕事チャレンジ!2)
-  Kagome GO! ME. "ONE DAY"
- Music Videos
-  Bokutachi Karen na Shounen Gasshoudan (僕たち可憐な少年合唱団) (as Yuria and Julian, team ♯Gumi)
-  Attack No.1 (アタックNo.1)
-  Fushigi no Kuni no Alice Tachi (不思議の国のアリスたち)
-  Reborn ~13-nin no Tamashi wa Kami-sama no Yume wo Miru~ (リボーン~13人の魂は神様の夢を見る~) (as Ono no Komachi)
-  Arabeyooooonds Nights (アラビヨーンズナイト) (as Aladdin)
- [2019–] Kanazawa Tomoko no Vivid Midnight (金澤朋子のVivid Midnight)
- [2020–] BEYOOOOONDS no Biyo～～～～～tto Tobikoe Night! (BEYOOOOONDSのビヨ～～～～～っと飛び越えナイト!)
- [2020–] BEYOOOOONDS no O no Kazu wa Itsutsu Desu (BEYOOOOONDSのOの数は5つです)
- Her favorite types of music are Hello! Project, Showa kayokyoku pop, Disney, and J-Pop.
- Particularly likes Showa era idols and songs, especially Matsuda Seiko, and hopes to have activities in the future involving Showa idol music.
- Her Favorite sports are badminton and baseball.
- Favorite food is watermelon and salmon.
- Her motto is "Do one good deed each day" (一日一善).
- Thinks her charm point is the dimple that only appears on her left cheek.
- Her favorite school subject is physical education.
- She loves dinosaurs; her favorite dinosaur is the Megalosaurus (she has previously named the tyrannosaurus, pteranodon, and parasaurolophus).
- She has two younger siblings.
- Her favorite Hello! Project song is "Ranrarun ~Anata ni Muchuu~" by Country Girls.
- Began learning to play guitar in 2019 as a hobby, but wants to become skilled enough to perform.
- During her December 2019 "Shimakura Rika 1001 Nights" talk event, she revealed that she originally wasn't aiming to become an idol; her mother sent in her application to Morning Musume's 13th generation audition without asking her. She started learning about Hello! Project after she was accepted into the audition. After failing the final round, she felt it was something worth working hard for.