Choi Soo Young
- Position: Sub Vocalist
- Stage name: Sooyoung
- Nickname: ShikShin (Food God), NaSoo (Interrupter)
- Birth date: February 10, 1990 (age 21)
- Blood Type: O
- Height: 170 cm
- Weight: 45 kg
- Birth place: Gwangju, Gyeonggi-do, South Korea
- Education: Jungshin All-Girls High School
- Languages: Chinese (Basic), Japanese (Fluent), English (Basic)
- Religion: Christianity
- Hobbies: Watching Movies, Internet, Food
- Favorite Artists: Craig David, TLC, Morning Musume, CHEMISTRY, S.E.S, BoA
- Favorite Actors: Tsukamoto Takashi, Fujiwara Tatsuya, Sean Penn, Jang Seo Hee
- Speciality: Japanese, Dance, Acting
- Favorite time: Shower time
- Favorite color: Black
- Favorite fashion: Chic Style, Hotpants and Onepieces
- Motto: "Let's not procrastinate"
- Roommate: Taeyeon & Yoona (Old Dorm), Jessica (New Dorm)
Kim Tae Yeon
- Position: Leader & Main Vocalist
- Stage name: Taeyeon
- Nicknames: Umma, Ajumma, Kid Leader, Tete
- Birth date: March 9, 1989 (age 22)
- Horoscope: Pisces
- Birth place: Jeollabuk-do, Jeonju, South Korea
- Blood Type: O
- Height: 160 cm
- Weight: 44 kg
- School: Jeonju Art High School
- Languages: English (Basic), Chinese (Basic), Japanese (Basic)
- Hobbies: Swimming
- Interests: Makeup, Perfume, Music
- Siblings: Brother (JiWoon)
- Motto: "Don't do something that you'll regret later".
- Roommate: Sooyoung & Yoona (Old Dorm), Sunny (New Dorm)
Jung Soo Yeon
- Position: Main Vocalist
- Korean name: Jung Soo Yeon
- Nicknames: Ice Princess, Sica, Sicachu
- Birthdate: April 18, 1989 (Age 22)
- Birthplace: San Francisco, California, United States of America
- Blood Type: B
- Height: 163 cm
- Weight: 45 kg
- Religion: Christian
- Siblings: Brother, Sister (Krystal)
- Education: Korea Kent Foreign School
- Languages: Korean (Fluent), Chinese (Basic), Japanese (Basic)
- Hobbies: Boxing, Soccer
- Speciality: Piano, English
- Favorite food: Chocolate Icecream
- Favorite fashion: A Simple White T-Shirt with Denim
- Makeup point: Lips
- Motto: Follow my heart ..
- Roommate: Hyoyeon (Old Dorm), Sooyoung (New Dorm)
Lee Sun Kyu
- Position: Sub Vocalist
- Stage name: Sunny
- Nickname: DJ Soon, Sunny Bunny
- Birth date: May 15, 1989 (age 22)
- Horoscope: Taurus
- Birth place: United States
- Blood Type: B
- Height: 155 cm
- Weight: 43 kg
- Education: Baehwa All-Girls High School
- Languages: English (Basic), Chinese (Basic), Japanese (Basic)
- Hobbies: Swimming, Video Games, Sports
- Interests: Music, Fashion, reading magazines, dancing, singing & shopping
- Favorite color: Yellow and Pink
- Favorite food: Japanese Ramen
- Favorite fashion: Denim
- Motto: "Everyday Sunny Day".
- Roommate: Yuri (Old Dorm), Taeyeon (New Dorm)
Im Yoon Ah
- Position: Sub Vocalist
- Stage name: Yoona
- Nick names: Deer Yoona, Him Yoona (Strength Yoona), Goddess Yoong, Yoong
- Birth date: May 30, 1990 (age 21)
- Birth place: Seoul, South Korea
- Blood Type: B
- Height: 166 cm
- Weight: 44 kg
- Education: British School, Dongguk University (Theater Major)
- Languages: English (Basic), Chinese (Basic), Japanese (Basic)
- Hobbies: Movies and Music
- Favorite time: A Morning When I Have Free Time
- Favorite color: Purple, Blue
- Favorite food: Icecream
- Motto: "Be confident in everything".
- Roommate: Taeyeon & Sooyoung (Old Dorm), Yuri (New Dorm)
Seo Joo Hyun
- Position: Lead Vocalist
- Stage name: Seo Hyun
- Nickname: Maknae, Seororo
- Birth date: June 28, 1991 (Age 20)
- Birth place: Seoul, South Korea
- Blood Type: A
- Height: 168 cm
- Weight: 46 kg
- Education: Daeyoung High School, Dongguk University (Theater Major)
- Languages: English (Basic), Chinese (Fluent), Japanese (Basic)
- Favorite Movie: Pirates of the Caribbean
- Motto: "If your dream is alive, then one day it will come true".
- Roommate: Tiffany (Old Dorm), Hyoyeon (New Dorm)
Hwang Mi Young
- Position: Sub Vocalist
- Stage name: Tiffany
- Korean name: Hwang Mi Young
- Nicknames: Spongebob Hwang, Fany Fany Tiffany, Human Jukebox, Mushroom
- Birth date: August 1, 1989 (age 22)
- Birth place: California, United States of America
- Blood Type: O
- Height: 162 cm
- Weight: 50 kg
- Religion: Christian
- Siblings: Brother (Leo), Sister (Michelle)
- Hobbies/ Skills: Playing the Flute, English
- Education: Korea Kent Foreign School, South Pointe High School, Diamond Bar High School
- Languages: Korean (Fluent), Chinese (Conversational), Japanese (Conversational), Spanish (Basic)
- Motto: Just work hard (Practice makes Perfect)
- Roommate: Seo Hyun (Old Dorm), Solo (New Dorm)
Kim Hyo Yeon
- Position: Sub Vocalist & Main Dancer
- Stage name: Hyoyeon
- Nicknames: Princess Fiona, Dancing Queen
- Birth date: September 22, 1989 (Age 22)
- Birth place: Incheon, South Korea
- Blood Type: AB
- Height: 160 cm
- Weight: 45 kg
- Languages: Chinese (Fluent), Japanese (Basic), English (Basic)
- Education: Chungbuk Middle School
- Hobbies: Shopping, Movies
- Favorite food: Soup, Korean food
- Favorite fashion: Feminine Shoes with Baggy Pants
- Motto: "Everyone that works hard will succeed".
- Roommate: Jessica (Old Dorm), Seo Hyun (New Dorm)
Kwon Yu Ri
- Position: Sub Vocalist & Dancer
- Stage name: Yuri
- Nicknames: Black Pearl, Kkamyool, Kkamchi
- Birth date: December 5, 1989 (age 22)
- Birth place: Goyang, Gyeonggi-do, South Korea
- Blood Type: AB
- Height: 167 cm
- Weight: 45 kg
- Education: NeungGok High School, Chung-Ang University (Drama Major)
- Languages: English (Basic), Chinese (Fluent), Japanese (Basic)
- Hobbies: Dancing, Ballet, Piano, Swimming, Violin
- Specialities: Acting, Swimming, Reading.
- Favorite time: A Quiet Morning
- Favorite food: Salad and Fruits
- Roommate: Sunny (Old Dorm), Yoona (New Dorm)
- Official Instagram: https://instagram.com/yulyulk/