- Name: Ogawa Rena (小川麗奈)
- Nickname: Rena-chan (れなこ), Renako (れなこ)
- Birthday: March 27, 2000
- Birthplace: Tochigi, Japan
- Blood type: A
- Height: 158cm
- Specialty: Piano, bending her thumb to touch her wrist
- Hobbies: Music appreciation
- Favorite Color: Red
- Looks Up To: Sugaya Risako
- Hello! Project groups:
Ogawa Rena participated in but failed the 2010 "Morning Musume 9th Generation" audition, and was later introduced as a member of Hello! Pro Kenshuusei in July 2011 at the "Hello! Pro Egg Kakikyuuka Mae Special! ~Shinjin-san!? Irassha~i!~" event. She went on to take both the 2011 "Morning Musume 10th Generation Genki Jirushi" and "Morning Musume 11th Generation ~Suppin Utahime~" auditions, but failed to pass either.
On January 2, 2015 she was revealed to be part of a new eight member group, later named Kobushi Factory. The unit consisted entirely of trainees from Hello! Pro Kenshuusei, including Fujii Rio, Hirose Ayaka, Nomura Minami, Hamaura Ayano, Taguchi Natsumi, Wada Sakurako, and Inoue Rei.
An announcement was made through the official Hello! Project website on July 13, 2017, stating that Rena would be on hiatus from all activities until mid-August due to medical concerns regarding anxiety. An update to her condition was announced on August 16th, revealing that she showed no signs of improvement thus far and would continue her medical hiatus on the recommendation of her doctors. On September 6, 2017 it was announced that Rena had decided to graduate from Kobushi Factory and Hello! Project. In her final statement she expressed her desire to not become a burden to her group, and her hopes that fans would remember her and welcome her into their ranks as a supporter.
- [2017.02.xx] Greeting ~Fujii Rio・Ogawa Rena~ (Greeting ~藤井梨央・小川麗奈~)
- [2017.03.25] Fujii Rio / Ogawa Rena Mini Photobook "Greeting -Photobook-" (藤井梨央・小川麗奈ミニ写真集「Greeting-Photobook-」) (Fujii Rio, Ogawa Rena)
-  JK Ninja Girls (JKニンジャガールズ)
- TV Programs
- [2013–2014] ~Onedari Entame! ~Hapi☆Pure (～おねだりエンタメ! ～はぴ☆ぷれ)
- [2015–2017] The Girls Live
-  S-cene
-  Hello Pro Kenshuusei no Tadaima Kenshuuchuu! (ハロプロ研修生のただ今研修中!)
-  UP-FRONT CHANNEL Recommend
- [2015–2017] Hello! Station (ハロ！ステ)
- Radio Dramas
-  Week End Survivor ~Purge Game~ (Week End Survivor~粛清ゲーム~)
- She is the first member of Hello! Project from Tochigi prefecture.
- She shares the same last name with S/mileage former member Ogawa Saki and former Morning Musume member Ogawa Makoto.
- Has been learning piano since she was two years old.
- On a rainy day she would watch TV.
- She would sing the song "Ame no Furanai Hoshi de wa Aisenai Darou?" by Morning Musume on a rainy day.
- Sports she is best at are track and field.
- Her favorite season is spring.
- Favorite flower is the sunflower.
- Her favorite Hello! Project songs are "Dance de Bakoon!" by °C-ute, "Namidacchi" by Morning Musume, and "Icchoume Rock!" by Berryz Kobo.
- Wrote in a magazine that her dream is to become an idol everyone knows.
- Her favorite sport is basketball.
- Enjoys reading mystery novels.