Fromis 9 is a South Korean girl group formed by CJ E&M through the 2017 reality show Idol School on Mnet. The group's name, pronounced as "promise" in Korean, also means "to keep their promise to be the best girl group". It is composed of nine members: Roh Ji-sun, Song Ha-young, Lee Sae-rom, Lee Chae-young, Lee Na-gyung, Park Ji-won, Lee Seo-yeon, Baek Ji-heon and Jang Gyu-ri

Stage Name: Saerom / 새롬
Real Name: Lee Sae-rom / 이새롬
Nicknames: Visual Saerom, Rom-Sae
Birthday: January 7, 1997
Birthplace: Suwon, South Korea
Blood Type: B
Height: 163 cm
Position in group: Team Captain (leader), Lead Dancer, Vocalist, Rapper, Visual
Languages: Korean, English
Education: Hanlim Multi Art High School, Applied Music Department Badge 4th (Alumni), Dongduk Women’s University
Rank 3 on Idol School (71.037 votes)

Stage Name: Hayoung / 하영
Real Name: Song Ha-young / 송하영
Nicknames: Song A-Ji, Mal-Babo, HaBBang
Birthday: September 29, 1997
Birthplace: Gwangju, South Korea
Blood Type: A
Height: 165 cm

Weight: 45.6 kg
Position in group: Vice-Captain, Main Dancer, Main Vocalist
Languages: Korean
Education: Hanlim Multi Art High School, Practical Dance Department Badge 5th (Alumni)
Rank 2 on Idol School (71.549 votes)

Stage Name: Gyuri / 규리
Real Name: Jang Gyu-ri / 장규리
Birthday: December 27, 1997
Birthplace: South Korea
Blood Type: B
Height: 168 cm

Weight: 51 kg

Position in group: Lead Vocalist, Face of the Group
Languages: Korean, English
Rank 9 on Idol School (57.230 votes)

Stage Name: Jiwon / 지원
Real Name: Park Ji-won / 박지원
Nicknames: Megan, kkomaengie
Birthday: March 20, 1998
Birthplace: Busan, South Korea
Blood Type: A

Height: 158 cm

Position in group: Main Vocalist
Languages: Korean
Education: Chungdam Senior high school
Rank 6 on Idol School (63.816 votes)

Stage Name: Jisun / 지선
Real Name: Roh Ji-sun / 노지선
Birthday: November 23, 1998
Birthplace: Seoul, South Korea
Blood Type: B

Height: 158 cm
Position in group: Vocalist, Center
Languages: Korean
Education: Daejin Girls High School

Siblings: one older brother
Rank 1 on Idol School (71,834 votes)

Stage Name: Seoyeon / 서연
Real Name: Lee Seo-yeon / 이서연
Nicknames: Sleep Head
Birthday: January 22, 2000
Birthplace: Seoul, South Korea
Blood Type: A
Height: 157 cm

Weight: 47 kg
Position in group: Main Rapper, Lead Dancer, Lead Vocalist
Languages: Korean
Education: SOPA (but she gave up in order to pursue her music career)
Rank 7 on Idol School (61.083 votes)

Stage Name: Chaeyoung / 채영
Real Name: Lee Chae-young / 이채영
Nicknames: Chaeng-ramji
Birthday: May 14, 2000
Birthplace: Pohang, South Korea
Blood Type: B
Height: 169 cm

Weight: 54 kg
Position in group: Main Dancer, Lead Rapper, Vocalist
Languages: Korean
Education: Hanlim Multi Art High School, Broadcasting & Entertainment Department Badge 8th (Senior)
Rank 4 on Idol School (65,318 votes)

Stage Name: Nagyung / 나경
Real Name: Lee Na-gyung / 이나경
Nicknames: Lee Nakko
Birthday: June 1, 2000
Birthplace: Bundang, South Korea
Blood Type: A
Height: 159 cm

Weight: 42 kg
Position in group: Lead Vocalist, Visual
Languages: Korean, Mandarin
Rank 5 on Idol School (64.001 votes)

Stage Name: Jiheon / 지헌
Real Name: Baek Ji-heon / 백지헌
Nicknames: Kkulging, Honey Maknae
Birthday: April 17, 2003
Birthplace: Boseong County, South Korea
Blood Type: B
Height: 165 cm

Position in group: Vocalist, Maknae
Languages: Korean
Education: Jeungpyeong Middle School
Rank 8 on Idol School