Aoki Erina (青木英里奈)
- Nicknames: Enna
- Birthdate: April 16, 1990
- Birthplace: Saitama, Japan
- Height: 161cm
- Blood type: A
- Sign: Aries
- Close friends: Korenaga Miki, Morozuka Kanami, Sengoku Minami, Noto Arisa, Sawada Yuri
- Hobbies: Keyboard, reading books
- Special skills: Keyboard (played since kindergarten), piano, drums
- Favorite Colour: Red, yellow, black
- FavoriteThing: Dogs (Yorkshire terrier)
- Disliked Thing: Injections
- Siblings: Two little brothers
Aoki Erina joined Hello! Project as a member of Hello! Pro Egg in June 2004 when she passed the auditions alongside thirty-two other girls.
- She is close friends with Korenaga Miki, Morozuka Kanami, Sengoku Minami, Noto Arisa, and Sawada Yuri.
- She has two siblings, younger brothers.
- Her record for the Long Jump (6/27/2006) is 2m 11cm.
- Made her first concert appearance at Hello! Project 2005 Winter All Stars Dairanbu.
- Hello! Pro Egg (2004-2005) No confirmed date of her graduation