Aoki Erina was born on April 16, 1990 in Saitama, Japan. She has two younger brothers.
Aoki has played the piano since kindergarten.
2004-2009: Hello Pro Egg
In June 2004, Aoki successfully passed the Hello Pro Egg 2004 Audition and became a founding member of Hello Pro Egg alongside 31 other girls. She made her first concert appearance as a member during the Hello! Project 2005 Winter All-Stars Dairanbu concert tour.
From June 7-13, 2006, Aoki appeared in the stage-play "Himeyuri no Hana wo Yurasu Kaze".
From October 13-22, 2006, she appeared in the stage-play "Ouji Mephisto -Gozen 0-ji no Joutaijou-".
From October 31 to November 4, 2007, she appeared in the stage play "Uchuu ni Tatchi".
From April 9-13, 2008, she appeared in the stage play "Watashi, Wakaranu".
In September 2008, she was absent from the 2008 Hello! Project Shinjin Kouen 9gatsu ~Shibakouen STEP!~ concert. She would later withdraw from Hello Pro Egg, and her last activity as a member was as a back-up dancer at the Hello! Project 2009 Winter Kettei! Hello☆Pro Award '09 ~Elder Club Sotsugyou Kinen Special~ concert.
Sometime in 2012, Aoki married and had a daughter.
- Name: Aoki Erina (青木英里奈)
- Nickname: Enna (えんな)
- Birthdate: April 16, 1990
- Birthplace: Saitama, Japan
- Blood Type: A
- Height: 161 cm (5 ft 3.3 in)?
- Western Zodiac: Aries
- Eastern Zodiac: Horse
- Hello! Project Status:
- 2004-06-20: Hello Pro Egg member
- 2009-02-01: Left
- UP-FRONT GROUP Status:
- 2004-06-20: Joined UP-FRONT AGENCY
- 2009-02-01: Left
- Hello! Project Groups:
- Hello Pro Egg (2004-2009)
- Concert Units:
- Wonderful Hearts (2006-2009)
-  Doutoku Joshi Tandai Ecoken (道徳女子短大 エコ研)
-  Himeyuri no Hana wo Yurasu Kaze (ひめゆりの花を揺らす風)
-  Ouji Mephisto -Gozen 0-ji no Joutaijou- (王子メフィスト -午前0時の招待状-)
-  Uchuu ni Touch (宇宙にタッチ)
-  Watashi, Wakaranu (私、わからぬ)
- Her hobbies are playing the keyboard and reading books.
- Her specialties are playing the keyboard, piano, and drums.
- She dislikes injections.
- Her favorite animal are Yorkshire Terriers.
- Her favorite colors are black, red, and yellow.
- She has modeled for UNI.T Agency.
- She is good friends with Korenaga Miki, Noto Arisa, Morozuka Kanami, Sengoku Minami, and Sawada Yuri.
- Her record for the Long Jump (6/27/2006) is 2m 11cm
- On November 8, 2016 she attended Up Up Girls (Kakko Kari)'s Budokan concert alongside several other former Hello Pro Egg members.